{"id":31479,"date":"2023-04-22T15:13:50","date_gmt":"2023-07-22T05:21:32","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%9c%a8java%e4%b8%ad%e8%bf%9b%e8%a1%8c%e7%ba%a6%e6%9d%9f%e7%bc%96%e7%a8%8b%e3%80%82\/"},"modified":"2024-04-30T00:45:32","modified_gmt":"2024-04-29T16:45:32","slug":"%e5%9c%a8java%e4%b8%ad%e8%bf%9b%e8%a1%8c%e7%ba%a6%e6%9d%9f%e7%bc%96%e7%a8%8b%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%9c%a8java%e4%b8%ad%e8%bf%9b%e8%a1%8c%e7%ba%a6%e6%9d%9f%e7%bc%96%e7%a8%8b%e3%80%82\/","title":{"rendered":"\u5728Java\u4e2d\u8fdb\u884c\u7ea6\u675f\u7f16\u7a0b"},"content":{"rendered":"<h1>\u9996\u5148<\/h1>\n<p>\u5236\u7d04\u7f16\u7a0b\u662f\u4e00\u79cd\u7f16\u7a0b\u8303\u5f0f\u3002\u5728\u7ea6\u675f\u7f16\u7a0b\u4e2d\uff0c\u6211\u4eec\u901a\u8fc7\u4f7f\u7528\u7ea6\u675f\u6765\u63cf\u8ff0\u53d8\u91cf\u4e4b\u95f4\u7684\u5173\u7cfb\u6765\u7f16\u5199\u7a0b\u5e8f\u3002<br \/>\n\u76ee\u524d\uff0c\u5f53\u63d0\u5230\u4eba\u5de5\u667a\u80fd\u65f6\uff0c\u5f80\u5f80\u4f1a\u88ab\u8ba4\u4e3a\u662f\u6df1\u5ea6\u5b66\u4e60\u7684\u540c\u4e49\u8bcd\uff0c\u4f46\u5728\u8fc7\u53bb\uff0c\u7ea6\u675f\u7f16\u7a0b\u548c\u6570\u503c\u5904\u7406\u7b49\u4e5f\u88ab\u79f0\u4e3a\u4eba\u5de5\u667a\u80fd\u3002<br \/>\n\u6211\u4eec\u5c06\u5728Java\u4e2d\u5b9e\u73b0\u4e00\u4e2a\u7ea6\u675f\u7f16\u7a0b\u5e93\uff0c\u5e76\u5c1d\u8bd5\u89e3\u51b3\u516b\u7687\u540e\u3001\u586b\u5b57\u8c1c\u548c\u6570\u72ec\u7b49\u95ee\u9898\u3002<\/p>\n<h1>\u9488\u5bf9\u7684\u95ee\u9898<\/h1>\n<p>\u6211\u4eec\u5c06\u9488\u5bf9\u6700\u7b80\u5355\u7684\u95ee\u9898\u8fdb\u884c\u8ba8\u8bba\u3002\u5177\u4f53\u6765\u8bf4\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e9b\u4f8b\u5b50\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u5909\u6570\u306e\u5b9a\u7fa9\u57df\u306f\u6574\u6570\u306e\u307f\u3068\u3057\u307e\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u5909\u6570\u306e\u5b9a\u7fa9\u57df\u306f\u6709\u9650\u3067\u3001\u305d\u306e\u7bc4\u56f2\u306f\u554f\u984c\u306e\u4e2d\u3067\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308b\u3082\u306e\u3068\u3057\u307e\u3059\u3002<\/ul>\n<h1>\u7b80\u5355\u7684\u4f8b\u9898<\/h1>\n<p>\u4e3a\u4e86\u89e3\u91ca\uff0c\u6211\u4eec\u6765\u8003\u8651\u4e00\u4e2a\u7b80\u5355\u7684\u4f8b\u5b50\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u5f0f a + b = c \u3092\u6e80\u305f\u3059\u5909\u6570a, b, c\u306e\u5024\u3092\u6c42\u3081\u3066\u304f\u3060\u3055\u3044\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u305f\u3060\u3057 a &lt; b \u3068\u3057\u307e\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u5909\u6570a, b, c\u306e\u5b9a\u7fa9\u57df\u306f{1, 2, 3}\u3068\u3057\u307e\u3059\u3002<\/ul>\n<h1>\u65b9\u6cd5<\/h1>\n<p>\u6211\u4eec\u53ea\u9700\u8981\u627e\u5230\u6bcf\u4e2a\u53d8\u91cf\u5b9a\u4e49\u57df\u7684\u503c\u6ee1\u8db3\u7ea6\u675f\u6761\u4ef6\u7684\u7ec4\u5408\uff0c\u56e0\u6b64\u6211\u4eec\u53ef\u4ee5\u8003\u8651\u4e00\u4e2a\u7b80\u5355\u7684\u4e09\u91cd\u5faa\u73af\u7a0b\u5e8f\u6765\u89e3\u51b3\u3002\u5728Java\u4e2d\u8868\u8fbe\u5982\u4e0b\uff1a<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">for<\/span> <span class=\"o\">(<\/span><span class=\"kt\">int<\/span> <span class=\"n\">a<\/span> <span class=\"o\">:<\/span> <span class=\"nc\">List<\/span><span class=\"o\">.<\/span><span class=\"na\">of<\/span><span class=\"o\">(<\/span><span class=\"mi\">1<\/span><span class=\"o\">,<\/span> <span class=\"mi\">2<\/span><span class=\"o\">,<\/span> <span class=\"mi\">3<\/span><span class=\"o\">))<\/span>\r\n    <span class=\"k\">for<\/span> <span class=\"o\">(<\/span><span class=\"kt\">int<\/span> <span class=\"n\">b<\/span> <span class=\"o\">:<\/span> <span class=\"nc\">List<\/span><span class=\"o\">.<\/span><span class=\"na\">of<\/span><span class=\"o\">(<\/span><span class=\"mi\">1<\/span><span class=\"o\">,<\/span> <span class=\"mi\">2<\/span><span class=\"o\">,<\/span> <span class=\"mi\">3<\/span><span class=\"o\">))<\/span>\r\n        <span class=\"k\">for<\/span> <span class=\"o\">(<\/span><span class=\"kt\">int<\/span> <span class=\"n\">c<\/span> <span class=\"o\">:<\/span> <span class=\"nc\">List<\/span><span class=\"o\">.<\/span><span class=\"na\">of<\/span><span class=\"o\">(<\/span><span class=\"mi\">1<\/span><span class=\"o\">,<\/span> <span class=\"mi\">2<\/span><span class=\"o\">,<\/span> <span class=\"mi\">3<\/span><span class=\"o\">))<\/span>\r\n            <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"n\">a<\/span> <span class=\"o\">&lt;<\/span> <span class=\"n\">b<\/span><span class=\"o\">)<\/span>\r\n                <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"n\">a<\/span> <span class=\"o\">+<\/span> <span class=\"n\">b<\/span> <span class=\"o\">==<\/span> <span class=\"n\">c<\/span><span class=\"o\">)<\/span>\r\n                    <span class=\"n\">answer<\/span><span class=\"o\">(<\/span><span class=\"n\">a<\/span><span class=\"o\">,<\/span> <span class=\"n\">b<\/span><span class=\"o\">,<\/span> <span class=\"n\">c<\/span><span class=\"o\">);<\/span>\r\n<\/code><\/pre>\n<p>\u5728\u627e\u5230\u7b54\u6848\u65f6\u8c03\u7528\u7684\u56de\u8c03\u51fd\u6570\u662fanswer\u3002<br \/>\n\u5728\u8fd9\u4e2a\u7a0b\u5e8f\u4e2d\uff0c\u5d4c\u5957\u7684for\u5faa\u73af\u7684\u6700\u5185\u90e8\u4f1a\u6267\u884c27\u6b21\uff0c\u53733 x 3 x 3\u3002<br \/>\n\u8003\u8651\u5230\u8fd0\u884c\u6548\u7387\uff0c\u6211\u4eec\u53ef\u4ee5\u7a0d\u5fae\u6539\u8fdb\u5b83\u3002\u7ea6\u675f\u6761\u4ef6a &lt; b\u53ef\u4ee5\u5728\u53d8\u91cfa\u548cb\u7684\u503c\u786e\u5b9a\u540e\u8fdb\u884c\u68c0\u67e5\uff0c\u56e0\u6b64\u53ef\u4ee5\u5c06\u5176\u6539\u5199\u4e3a\u4ee5\u4e0b\u5f62\u5f0f\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">for<\/span> <span class=\"o\">(<\/span><span class=\"kt\">int<\/span> <span class=\"n\">a<\/span> <span class=\"o\">:<\/span> <span class=\"nc\">List<\/span><span class=\"o\">.<\/span><span class=\"na\">of<\/span><span class=\"o\">(<\/span><span class=\"mi\">1<\/span><span class=\"o\">,<\/span> <span class=\"mi\">2<\/span><span class=\"o\">,<\/span> <span class=\"mi\">3<\/span><span class=\"o\">))<\/span>\r\n    <span class=\"k\">for<\/span> <span class=\"o\">(<\/span><span class=\"kt\">int<\/span> <span class=\"n\">b<\/span> <span class=\"o\">:<\/span> <span class=\"nc\">List<\/span><span class=\"o\">.<\/span><span class=\"na\">of<\/span><span class=\"o\">(<\/span><span class=\"mi\">1<\/span><span class=\"o\">,<\/span> <span class=\"mi\">2<\/span><span class=\"o\">,<\/span> <span class=\"mi\">3<\/span><span class=\"o\">))<\/span>\r\n        <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"n\">a<\/span> <span class=\"o\">&lt;<\/span> <span class=\"n\">b<\/span><span class=\"o\">)<\/span>\r\n            <span class=\"k\">for<\/span> <span class=\"o\">(<\/span><span class=\"kt\">int<\/span> <span class=\"n\">c<\/span> <span class=\"o\">:<\/span> <span class=\"nc\">List<\/span><span class=\"o\">.<\/span><span class=\"na\">of<\/span><span class=\"o\">(<\/span><span class=\"mi\">1<\/span><span class=\"o\">,<\/span> <span class=\"mi\">2<\/span><span class=\"o\">,<\/span> <span class=\"mi\">3<\/span><span class=\"o\">))<\/span>\r\n                <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"n\">a<\/span> <span class=\"o\">+<\/span> <span class=\"n\">b<\/span> <span class=\"o\">==<\/span> <span class=\"n\">c<\/span><span class=\"o\">)<\/span>\r\n                    <span class=\"n\">answer<\/span><span class=\"o\">(<\/span><span class=\"n\">a<\/span><span class=\"o\">,<\/span> <span class=\"n\">b<\/span><span class=\"o\">,<\/span> <span class=\"n\">c<\/span><span class=\"o\">);<\/span>\r\n<\/code><\/pre>\n<p>\u6ee1\u8db3\u6761\u4ef6a &lt; b\u7684\u7ec4\u5408\u53ea\u6709\u4e09\u79cd\uff1a(1, 2), (1, 3), (2, 3)\u3002\u5bf9\u4e8e\u8fd9\u4e09\u79cd\u7ec4\u5408\uff0c\u5c06\u6267\u884c\u5d4c\u5957\u7684for\u5faa\u73af\u6700\u5185\u90e8\u7684for (int c : List.of(1, 2, 3))\uff0c\u8fd9\u6837\u603b\u5171\u6267\u884c9\u6b21\u3002\u4e0e\u524d\u8ff0\u4ee3\u7801\u76f8\u6bd4\uff0c\u6027\u80fd\u9884\u8ba1\u53ef\u4ee5\u63d0\u9ad8\u7ea63\u500d\u3002\u7531\u4e8e\u7ea6\u675f\u68c0\u67e5\u6b21\u6570\u4e5f\u51cf\u5c11\u4e86\uff0c\u53ef\u80fd\u4f1a\u66f4\u5feb\u3002<br \/>\n\u8ba9\u6211\u4eec\u7528\u8fd9\u79cd\u65b9\u6cd5\u6765\u6784\u5efa\u7a0b\u5e8f\u3002<br \/>\n\u603b\u7ed3\u5982\u4e0b\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u5404\u5909\u6570\u306b\u5b9a\u7fa9\u57df\u306e\u5024\u3092\u9806\u6b21\u4ee3\u5165\u3059\u308b\u30eb\u30fc\u30d7\u3092\u5165\u308c\u5b50\u306b\u3057\u307e\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u5236\u7d04\u306f\u306a\u308b\u3079\u304f\u5916\u5074\u306e\u30eb\u30fc\u30d7\u5185\u3067\u30c1\u30a7\u30c3\u30af\u3059\u308b\u3053\u3068\u306b\u3088\u308a\u52b9\u7387\u3092\u4e0a\u3052\u307e\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u89e3\u304c\u898b\u3064\u304b\u3063\u305f\u6642\u70b9\u3067\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u3092\u547c\u3073\u51fa\u3057\u307e\u3059\u3002<\/ul>\n<h1>\u6a21\u7279\u513f (M\u00f3 t\u00e8 \u00e9r)<\/h1>\n<p>\u4f5c\u4e3a\u5019\u9009\u73ed\u7ea7\uff0c\u4ee5\u4e0b\u51e0\u4e2a\u53ef\u80fd\u8003\u8651\u7684\u9009\u9879\uff1a<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u554f\u984c (Problem)<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u89e3\u304f\u3079\u304d\u554f\u984c\u306e\u30af\u30e9\u30b9\u3067\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u5909\u6570 (Variable)<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u554f\u984c\u306b\u8868\u308c\u308b\u5909\u6570\u3067\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u5b9a\u7fa9\u57df (Domain)<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u5404\u5909\u6570\u306e\u5b9a\u7fa9\u57df\u3067\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u5236\u7d04 (Constraint)<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u5909\u6570\u304c\u6e80\u305f\u3059\u3079\u304d\u5236\u7d04\u5f0f\u3067\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u5236\u7d04\u5f0f(Predicate)<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u5236\u7d04\u5f0f\u3092\u30e9\u30e0\u30c0\u5f0f\u3067\u8868\u73fe\u3059\u308b\u305f\u3081\u306e\u95a2\u6570\u578b\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u3067\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u554f\u984c\u89e3\u6c7a (Solver)<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u554f\u984c\u3092\u89e3\u304d\u307e\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u89e3 (Answer)<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u89e3\u304c\u898b\u3064\u304b\u3063\u305f\u3068\u304d\u306b\u547c\u3073\u51fa\u3055\u308c\u308b\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u3067\u3059\u3002<\/ul>\n<p>\u5982\u679c\u4ee5UML\u7c7b\u56fe\u8868\u793a\uff0c\u5c06\u5982\u4e0b\u6240\u793a\u3002<\/p>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d0d0e37434c4406bea24a\/19-0.png\" alt=\"SimpleModel.png\" \/><\/div>\n<h1>\u7f16\u7801<\/h1>\n<p>\u57df\uff08Domain\uff09\u662f\u4e00\u4e2a\u5305\u542b\u4e0d\u53d8\u6574\u6570\u7684\u5217\u8868\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">Domain<\/span> <span class=\"kd\">extends<\/span> <span class=\"nc\">AbstractList<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Integer<\/span><span class=\"o\">&gt;<\/span> <span class=\"o\">{<\/span>\r\n\r\n    <span class=\"kd\">private<\/span> <span class=\"kd\">final<\/span> <span class=\"kt\">int<\/span><span class=\"o\">[]<\/span> <span class=\"n\">elements<\/span><span class=\"o\">;<\/span>\r\n\r\n    <span class=\"kd\">private<\/span> <span class=\"nf\">Domain<\/span><span class=\"o\">(<\/span><span class=\"kt\">int<\/span><span class=\"o\">...<\/span> <span class=\"n\">elements<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">elements<\/span> <span class=\"o\">=<\/span> <span class=\"n\">elements<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"o\">}<\/span>\r\n\r\n    <span class=\"kd\">public<\/span> <span class=\"kd\">static<\/span> <span class=\"nc\">Domain<\/span> <span class=\"nf\">of<\/span><span class=\"o\">(<\/span><span class=\"kt\">int<\/span><span class=\"o\">...<\/span> <span class=\"n\">elements<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"k\">new<\/span> <span class=\"nf\">Domain<\/span><span class=\"o\">(<\/span><span class=\"nc\">Arrays<\/span><span class=\"o\">.<\/span><span class=\"na\">copyOf<\/span><span class=\"o\">(<\/span><span class=\"n\">elements<\/span><span class=\"o\">,<\/span> <span class=\"n\">elements<\/span><span class=\"o\">.<\/span><span class=\"na\">length<\/span><span class=\"o\">));<\/span>\r\n    <span class=\"o\">}<\/span>\r\n\r\n    <span class=\"kd\">public<\/span> <span class=\"kd\">static<\/span> <span class=\"nc\">Domain<\/span> <span class=\"nf\">range<\/span><span class=\"o\">(<\/span><span class=\"kt\">int<\/span> <span class=\"n\">startInclusive<\/span><span class=\"o\">,<\/span> <span class=\"kt\">int<\/span> <span class=\"n\">endExclusive<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"k\">new<\/span> <span class=\"nf\">Domain<\/span><span class=\"o\">(<\/span><span class=\"nc\">IntStream<\/span><span class=\"o\">.<\/span><span class=\"na\">range<\/span><span class=\"o\">(<\/span><span class=\"n\">startInclusive<\/span><span class=\"o\">,<\/span> <span class=\"n\">endExclusive<\/span><span class=\"o\">).<\/span><span class=\"na\">toArray<\/span><span class=\"o\">());<\/span>\r\n    <span class=\"o\">}<\/span>\r\n\r\n    <span class=\"kd\">public<\/span> <span class=\"kd\">static<\/span> <span class=\"nc\">Domain<\/span> <span class=\"nf\">rangeClosed<\/span><span class=\"o\">(<\/span><span class=\"kt\">int<\/span> <span class=\"n\">startInclusive<\/span><span class=\"o\">,<\/span> <span class=\"kt\">int<\/span> <span class=\"n\">endInclusive<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"nf\">range<\/span><span class=\"o\">(<\/span><span class=\"n\">startInclusive<\/span><span class=\"o\">,<\/span> <span class=\"n\">endInclusive<\/span> <span class=\"o\">+<\/span> <span class=\"mi\">1<\/span><span class=\"o\">);<\/span>\r\n    <span class=\"o\">}<\/span>\r\n\r\n    <span class=\"nd\">@Override<\/span> <span class=\"kd\">public<\/span> <span class=\"nc\">Integer<\/span> <span class=\"nf\">get<\/span><span class=\"o\">(<\/span><span class=\"kt\">int<\/span> <span class=\"n\">index<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span> <span class=\"k\">return<\/span> <span class=\"n\">elements<\/span><span class=\"o\">[<\/span><span class=\"n\">index<\/span><span class=\"o\">];<\/span> <span class=\"o\">}<\/span>\r\n    <span class=\"nd\">@Override<\/span> <span class=\"kd\">public<\/span> <span class=\"kt\">int<\/span> <span class=\"nf\">size<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span> <span class=\"k\">return<\/span> <span class=\"n\">elements<\/span><span class=\"o\">.<\/span><span class=\"na\">length<\/span><span class=\"o\">;<\/span> <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<p>\u53d8\u91cf\u662f\u4e00\u4e2a\u5177\u6709\u540d\u79f0\u548c\u5b9a\u4e49\u57df\u7684\u7c7b\u3002\u5b83\u4fdd\u5b58\u4e86\u4e0e\u8be5\u53d8\u91cf\u76f8\u5173\u7684\u6240\u6709\u7ea6\u675f\u7684\u5f15\u7528\u3002\u7531\u4e8e\u5b9e\u4f8b\u7684\u751f\u6210\u662f\u901a\u8fc7\u95ee\u9898\u7684\u5de5\u5382\u65b9\u6cd5\u5b8c\u6210\u7684\uff0c\u56e0\u6b64\u6784\u9020\u51fd\u6570\u5177\u6709\u5305\u4f5c\u7528\u57df\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">Variable<\/span> <span class=\"o\">{<\/span>\r\n\r\n    <span class=\"kd\">public<\/span> <span class=\"kd\">final<\/span> <span class=\"nc\">String<\/span> <span class=\"n\">name<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"kd\">public<\/span> <span class=\"kd\">final<\/span> <span class=\"nc\">Domain<\/span> <span class=\"n\">domain<\/span><span class=\"o\">;<\/span>\r\n\r\n    <span class=\"kd\">private<\/span> <span class=\"kd\">final<\/span> <span class=\"nc\">List<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Constraint<\/span><span class=\"o\">&gt;<\/span> <span class=\"n\">_constraints<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">ArrayList<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Constraint<\/span><span class=\"o\">&gt;();<\/span>\r\n    <span class=\"kd\">public<\/span> <span class=\"kd\">final<\/span> <span class=\"nc\">List<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Constraint<\/span><span class=\"o\">&gt;<\/span> <span class=\"n\">constraints<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">Collections<\/span><span class=\"o\">.<\/span><span class=\"na\">unmodifiableList<\/span><span class=\"o\">(<\/span><span class=\"n\">_constraints<\/span><span class=\"o\">);<\/span>\r\n\r\n    <span class=\"nc\">Variable<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span> <span class=\"n\">name<\/span><span class=\"o\">,<\/span> <span class=\"nc\">Domain<\/span> <span class=\"n\">domain<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">name<\/span> <span class=\"o\">=<\/span> <span class=\"n\">name<\/span><span class=\"o\">;<\/span>\r\n        <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">domain<\/span> <span class=\"o\">=<\/span> <span class=\"n\">domain<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"o\">}<\/span>\r\n\r\n    <span class=\"kt\">void<\/span> <span class=\"nf\">add<\/span><span class=\"o\">(<\/span><span class=\"nc\">Constraint<\/span> <span class=\"n\">constraint<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">_constraints<\/span><span class=\"o\">.<\/span><span class=\"na\">add<\/span><span class=\"o\">(<\/span><span class=\"n\">constraint<\/span><span class=\"o\">);<\/span>\r\n    <span class=\"o\">}<\/span>\r\n\r\n    <span class=\"nd\">@Override<\/span>\r\n    <span class=\"kd\">public<\/span> <span class=\"nc\">String<\/span> <span class=\"nf\">toString<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"n\">name<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"o\">}<\/span>\r\n\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<p>\u7ea6\u675f\u5f0f\uff08Predicate\uff09\u662f\u7528\u4e8e\u4ee5\u8868\u8fbe\u5f0f\u5f62\u5f0f\u8868\u793a\u7ea6\u675f\u7684\u51fd\u6570\u63a5\u53e3\u3002<br \/>\n\u53ea\u5b9a\u4e49\u4e86\u4e00\u4e2atest\uff08int &#8230;\uff09\u65b9\u6cd5\uff0c\u8be5\u65b9\u6cd5\u5728\u6240\u6709\u4e0e\u7ea6\u675f\u76f8\u5173\u7684\u53d8\u91cf\u7684\u503c\u88ab\u7ed1\u5b9a\u65f6\u4f5c\u4e3a\u53c2\u6570\u8c03\u7528\u3002<br \/>\n\u901a\u8fc7\u4f7f\u7528\u5b83\uff0c\u53ef\u4ee5\u4f7f\u7528Lambda\u8868\u8fbe\u5f0f\u8868\u793a\u7ea6\u675f\u5f0f\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nd\">@FunctionalInterface<\/span>\r\n<span class=\"kd\">public<\/span> <span class=\"kd\">interface<\/span> <span class=\"nc\">Predicate<\/span> <span class=\"o\">{<\/span>\r\n\r\n    <span class=\"kt\">boolean<\/span> <span class=\"nf\">test<\/span><span class=\"o\">(<\/span><span class=\"kt\">int<\/span><span class=\"o\">...<\/span> <span class=\"n\">values<\/span><span class=\"o\">);<\/span>\r\n\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<p>\u5236\u7d04\uff08Predicate\uff09\u662f\u4e00\u4e2a\u5177\u6709\u7ea6\u675f\u5f0f\uff08Predicate\uff09\u548c\u4e0e\u7ea6\u675f\u76f8\u5173\u7684\u53d8\u91cf\u5f15\u7528\u7684\u4e0d\u53d8\u7c7b\u3002<br \/>\n\u7531\u4e8e\u5b9e\u4f8b\u7684\u521b\u5efa\u662f\u901a\u8fc7\u95ee\u9898\uff08Problem\uff09\u7684\u5de5\u5382\u65b9\u6cd5\u8fdb\u884c\u7684\uff0c\u56e0\u6b64\u6784\u9020\u51fd\u6570\u5177\u6709\u5305\u8303\u56f4\u7684\u53ef\u89c1\u6027\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">Constraint<\/span> <span class=\"o\">{<\/span>\r\n\r\n    <span class=\"kd\">public<\/span> <span class=\"kd\">final<\/span> <span class=\"nc\">Predicate<\/span> <span class=\"n\">predicate<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"kd\">public<\/span> <span class=\"kd\">final<\/span> <span class=\"nc\">List<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Variable<\/span><span class=\"o\">&gt;<\/span> <span class=\"n\">variables<\/span><span class=\"o\">;<\/span>\r\n\r\n    <span class=\"nc\">Constraint<\/span><span class=\"o\">(<\/span><span class=\"nc\">Predicate<\/span> <span class=\"n\">predicate<\/span><span class=\"o\">,<\/span> <span class=\"nc\">Variable<\/span><span class=\"o\">...<\/span> <span class=\"n\">variables<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">predicate<\/span> <span class=\"o\">=<\/span> <span class=\"n\">predicate<\/span><span class=\"o\">;<\/span>\r\n        <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">variables<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">List<\/span><span class=\"o\">.<\/span><span class=\"na\">of<\/span><span class=\"o\">(<\/span><span class=\"n\">variables<\/span><span class=\"o\">);<\/span>\r\n    <span class=\"o\">}<\/span>\r\n\r\n    <span class=\"nd\">@Override<\/span>\r\n    <span class=\"kd\">public<\/span> <span class=\"nc\">String<\/span> <span class=\"nf\">toString<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"s\">\"\u5236\u7d04\"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">variables<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<p>\u95ee\u9898\u662f\u4e00\u4e2a\u5177\u6709\u76f8\u5173\u53d8\u91cf\u548c\u7ea6\u675f\u7684\u7c7b\u3002<br \/>\n\u53d8\u91cf\u7684\u5b9a\u4e49\u662f\u901a\u8fc7variable(String, Domain)\u8fdb\u884c\u7684\u3002<br \/>\n\u7ea6\u675f\u7684\u5b9a\u4e49\u662f\u901a\u8fc7constraint(Predicate, Variable&#8230;)\u8fdb\u884c\u7684\u3002<br \/>\n\u4e3a\u4e86\u7b80\u5355\u5730\u8868\u793a\u591a\u4e2a\u53d8\u91cf\u4e4b\u95f4\u7684\u7ea6\u675f\uff0c\u6709\u4e00\u4e2a\u65b9\u6cd5allDifferent(Variable&#8230;)\uff0c\u8be5\u65b9\u6cd5\u8981\u6c42\u4efb\u610f\u4e24\u4e2a\u53d8\u91cf\u7684\u503c\u90fd\u4e0d\u76f8\u540c\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">Problem<\/span> <span class=\"o\">{<\/span>\r\n\r\n    <span class=\"kd\">private<\/span> <span class=\"nc\">List<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Variable<\/span><span class=\"o\">&gt;<\/span> <span class=\"n\">_variables<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">ArrayList<\/span><span class=\"o\">&lt;&gt;();<\/span>\r\n    <span class=\"kd\">public<\/span> <span class=\"nc\">List<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Variable<\/span><span class=\"o\">&gt;<\/span> <span class=\"n\">variables<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">Collections<\/span><span class=\"o\">.<\/span><span class=\"na\">unmodifiableList<\/span><span class=\"o\">(<\/span><span class=\"n\">_variables<\/span><span class=\"o\">);<\/span>\r\n    <span class=\"kd\">private<\/span> <span class=\"nc\">Map<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">String<\/span><span class=\"o\">,<\/span> <span class=\"nc\">Variable<\/span><span class=\"o\">&gt;<\/span> <span class=\"n\">variableMap<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">HashMap<\/span><span class=\"o\">&lt;&gt;();<\/span>\r\n\r\n    <span class=\"kd\">private<\/span> <span class=\"nc\">List<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Constraint<\/span><span class=\"o\">&gt;<\/span> <span class=\"n\">_constraints<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">ArrayList<\/span><span class=\"o\">&lt;&gt;();<\/span>\r\n    <span class=\"kd\">public<\/span> <span class=\"nc\">List<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Constraint<\/span><span class=\"o\">&gt;<\/span> <span class=\"n\">constraints<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">Collections<\/span><span class=\"o\">.<\/span><span class=\"na\">unmodifiableList<\/span><span class=\"o\">(<\/span><span class=\"n\">_constraints<\/span><span class=\"o\">);<\/span>\r\n\r\n    <span class=\"kd\">public<\/span> <span class=\"nc\">Variable<\/span> <span class=\"nf\">variable<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span> <span class=\"n\">name<\/span><span class=\"o\">,<\/span> <span class=\"nc\">Domain<\/span> <span class=\"n\">domain<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"n\">variableMap<\/span><span class=\"o\">.<\/span><span class=\"na\">containsKey<\/span><span class=\"o\">(<\/span><span class=\"n\">name<\/span><span class=\"o\">))<\/span>\r\n            <span class=\"k\">throw<\/span> <span class=\"k\">new<\/span> <span class=\"nf\">IllegalArgumentException<\/span><span class=\"o\">(<\/span><span class=\"s\">\"\u5909\u6570\u540d\u304c\u91cd\u8907: \"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">name<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"nc\">Variable<\/span> <span class=\"n\">v<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Variable<\/span><span class=\"o\">(<\/span><span class=\"n\">name<\/span><span class=\"o\">,<\/span> <span class=\"n\">domain<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">_variables<\/span><span class=\"o\">.<\/span><span class=\"na\">add<\/span><span class=\"o\">(<\/span><span class=\"n\">v<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">variableMap<\/span><span class=\"o\">.<\/span><span class=\"na\">put<\/span><span class=\"o\">(<\/span><span class=\"n\">name<\/span><span class=\"o\">,<\/span> <span class=\"n\">v<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"n\">v<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"o\">}<\/span>\r\n\r\n    <span class=\"kd\">public<\/span> <span class=\"nc\">Variable<\/span> <span class=\"nf\">variable<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span> <span class=\"n\">name<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"n\">variableMap<\/span><span class=\"o\">.<\/span><span class=\"na\">get<\/span><span class=\"o\">(<\/span><span class=\"n\">name<\/span><span class=\"o\">);<\/span>\r\n    <span class=\"o\">}<\/span>\r\n\r\n    <span class=\"kd\">public<\/span> <span class=\"nc\">Constraint<\/span> <span class=\"nf\">constraint<\/span><span class=\"o\">(<\/span><span class=\"nc\">Predicate<\/span> <span class=\"n\">predicate<\/span><span class=\"o\">,<\/span> <span class=\"nc\">Variable<\/span><span class=\"o\">...<\/span> <span class=\"n\">variables<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"nc\">Constraint<\/span> <span class=\"n\">c<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Constraint<\/span><span class=\"o\">(<\/span><span class=\"n\">predicate<\/span><span class=\"o\">,<\/span> <span class=\"n\">variables<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"k\">for<\/span> <span class=\"o\">(<\/span><span class=\"nc\">Variable<\/span> <span class=\"n\">v<\/span> <span class=\"o\">:<\/span> <span class=\"n\">variables<\/span><span class=\"o\">)<\/span>\r\n            <span class=\"n\">v<\/span><span class=\"o\">.<\/span><span class=\"na\">add<\/span><span class=\"o\">(<\/span><span class=\"n\">c<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">_constraints<\/span><span class=\"o\">.<\/span><span class=\"na\">add<\/span><span class=\"o\">(<\/span><span class=\"n\">c<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"n\">c<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"o\">}<\/span>\r\n\r\n    <span class=\"kd\">public<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">allDifferent<\/span><span class=\"o\">(<\/span><span class=\"nc\">Variable<\/span><span class=\"o\">...<\/span> <span class=\"n\">variables<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"k\">for<\/span> <span class=\"o\">(<\/span><span class=\"kt\">int<\/span> <span class=\"n\">i<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"n\">size<\/span> <span class=\"o\">=<\/span> <span class=\"n\">variables<\/span><span class=\"o\">.<\/span><span class=\"na\">length<\/span><span class=\"o\">;<\/span> <span class=\"n\">i<\/span> <span class=\"o\">&lt;<\/span> <span class=\"n\">size<\/span><span class=\"o\">;<\/span> <span class=\"o\">++<\/span><span class=\"n\">i<\/span><span class=\"o\">)<\/span>\r\n            <span class=\"k\">for<\/span> <span class=\"o\">(<\/span><span class=\"kt\">int<\/span> <span class=\"n\">j<\/span> <span class=\"o\">=<\/span> <span class=\"n\">i<\/span> <span class=\"o\">+<\/span> <span class=\"mi\">1<\/span><span class=\"o\">;<\/span> <span class=\"n\">j<\/span> <span class=\"o\">&lt;<\/span> <span class=\"n\">size<\/span><span class=\"o\">;<\/span> <span class=\"o\">++<\/span><span class=\"n\">j<\/span><span class=\"o\">)<\/span>\r\n                <span class=\"n\">constraint<\/span><span class=\"o\">(<\/span><span class=\"n\">a<\/span> <span class=\"o\">-&gt;<\/span> <span class=\"n\">a<\/span><span class=\"o\">[<\/span><span class=\"mi\">0<\/span><span class=\"o\">]<\/span> <span class=\"o\">!=<\/span> <span class=\"n\">a<\/span><span class=\"o\">[<\/span><span class=\"mi\">1<\/span><span class=\"o\">],<\/span> <span class=\"n\">variables<\/span><span class=\"o\">[<\/span><span class=\"n\">i<\/span><span class=\"o\">],<\/span> <span class=\"n\">variables<\/span><span class=\"o\">[<\/span><span class=\"n\">j<\/span><span class=\"o\">]);<\/span>\r\n    <span class=\"o\">}<\/span>\r\n\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<p>\u89e3(Answer)\u662f\u4e00\u4e2a\u7528\u4e8e\u63a5\u6536\u627e\u5230\u7684\u89e3\u7684\u56de\u8c03\u51fd\u6570\u3002<br \/>\n\u5b83\u4ee5\u53d8\u91cf\u548c\u503c\u7684\u5bf9\u4f5c\u4e3aMap\u8fdb\u884c\u63a5\u6536\u3002<br \/>\n\u7531\u4e8e\u5b9e\u8d28\u4e0a\u662f\u51fd\u6570\u63a5\u53e3\uff0c\u56e0\u6b64\u53ef\u4ee5\u4f7f\u7528Lambda\u8868\u8fbe\u5f0f\u6765\u7f16\u5199\u56de\u8c03\u51fd\u6570\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">interface<\/span> <span class=\"nc\">Answer<\/span> <span class=\"o\">{<\/span>\r\n\r\n    <span class=\"kt\">void<\/span> <span class=\"nf\">answer<\/span><span class=\"o\">(<\/span><span class=\"nc\">Map<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Variable<\/span><span class=\"o\">,<\/span> <span class=\"nc\">Integer<\/span><span class=\"o\">&gt;<\/span> <span class=\"n\">result<\/span><span class=\"o\">);<\/span>\r\n\r\n<span class=\"o\">}<\/span>\r\n\r\n<\/code><\/pre>\n<p>\u95ee\u9898\u89e3\u51b3\u5668\uff08Solver\uff09\u5177\u6709\u4e00\u4e2asolve(Problem, Answer)\u65b9\u6cd5\uff0c\u8be5\u65b9\u6cd5\u4ece\u95ee\u9898\uff08Problem\uff09\u4e2d\u627e\u5230\u89e3\u7b54\u3002<\/p>\n<p>\u7531\u4e8e\u53d8\u91cf\u6570\u91cf\u53ef\u53d8\uff0c\u6240\u4ee5\u65e0\u6cd5\u901a\u8fc7\u7c7b\u4f3c\u4e8e\u4e4b\u524d\u6240\u8ff0\u7684\u5d4c\u5957for\u5faa\u73af\u6765\u5b9e\u73b0\u7ed1\u5b9a\uff0c\u800c\u662f\u901a\u8fc7\u9012\u5f52\u8c03\u7528\u6765\u8fdb\u884c\u7ed1\u5b9a\u3002<\/p>\n<p>\u91cd\u8f7d\u7684solve(Problem, List, Answer)\u65b9\u6cd5\u53ef\u4ee5\u901a\u8fc7List\u6307\u5b9a\u89e3\u51b3\u95ee\u9898\u65f6\u7684\u53d8\u91cf\u7ed1\u5b9a\u987a\u5e8f\u3002<\/p>\n<p>\u5185\u90e8\u7684\u9759\u6001\u65b9\u6cd5constraintOrder(List, List)\u6839\u636e\u53d8\u91cf\u7ed1\u5b9a\u987a\u5e8f\u6765\u786e\u5b9a\u53ef\u5e94\u7528\u7684\u7ea6\u675f\uff08Constraint\uff09\u987a\u5e8f\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">Solver<\/span> <span class=\"o\">{<\/span>\r\n\r\n    <span class=\"kd\">static<\/span> <span class=\"kd\">final<\/span> <span class=\"nc\">Logger<\/span> <span class=\"n\">logger<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">Logger<\/span><span class=\"o\">.<\/span><span class=\"na\">getLogger<\/span><span class=\"o\">(<\/span><span class=\"nc\">Solver<\/span><span class=\"o\">.<\/span><span class=\"na\">class<\/span><span class=\"o\">.<\/span><span class=\"na\">getName<\/span><span class=\"o\">());<\/span>\r\n\r\n    <span class=\"kd\">static<\/span> <span class=\"nc\">List<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">List<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Constraint<\/span><span class=\"o\">&gt;&gt;<\/span> <span class=\"nf\">constraintOrder<\/span><span class=\"o\">(<\/span><span class=\"nc\">List<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Variable<\/span><span class=\"o\">&gt;<\/span> <span class=\"n\">bindingOrder<\/span><span class=\"o\">,<\/span> <span class=\"nc\">List<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Constraint<\/span><span class=\"o\">&gt;<\/span> <span class=\"n\">constraints<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"kt\">int<\/span> <span class=\"n\">variableSize<\/span> <span class=\"o\">=<\/span> <span class=\"n\">bindingOrder<\/span><span class=\"o\">.<\/span><span class=\"na\">size<\/span><span class=\"o\">();<\/span>\r\n        <span class=\"kt\">int<\/span> <span class=\"n\">constraintSize<\/span> <span class=\"o\">=<\/span> <span class=\"n\">constraints<\/span><span class=\"o\">.<\/span><span class=\"na\">size<\/span><span class=\"o\">();<\/span>\r\n        <span class=\"nc\">List<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">List<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Constraint<\/span><span class=\"o\">&gt;&gt;<\/span> <span class=\"n\">result<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">ArrayList<\/span><span class=\"o\">&lt;&gt;(<\/span><span class=\"n\">variableSize<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"nc\">Set<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Constraint<\/span><span class=\"o\">&gt;<\/span> <span class=\"n\">done<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">HashSet<\/span><span class=\"o\">&lt;&gt;(<\/span><span class=\"n\">constraintSize<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"nc\">Set<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Variable<\/span><span class=\"o\">&gt;<\/span> <span class=\"n\">bound<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">HashSet<\/span><span class=\"o\">&lt;&gt;(<\/span><span class=\"n\">variableSize<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"k\">for<\/span> <span class=\"o\">(<\/span><span class=\"nc\">Variable<\/span> <span class=\"n\">v<\/span> <span class=\"o\">:<\/span> <span class=\"n\">bindingOrder<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n            <span class=\"n\">bound<\/span><span class=\"o\">.<\/span><span class=\"na\">add<\/span><span class=\"o\">(<\/span><span class=\"n\">v<\/span><span class=\"o\">);<\/span>\r\n            <span class=\"nc\">List<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Constraint<\/span><span class=\"o\">&gt;<\/span> <span class=\"n\">list<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">ArrayList<\/span><span class=\"o\">&lt;&gt;();<\/span>\r\n            <span class=\"n\">result<\/span><span class=\"o\">.<\/span><span class=\"na\">add<\/span><span class=\"o\">(<\/span><span class=\"n\">list<\/span><span class=\"o\">);<\/span>\r\n            <span class=\"k\">for<\/span> <span class=\"o\">(<\/span><span class=\"nc\">Constraint<\/span> <span class=\"n\">c<\/span> <span class=\"o\">:<\/span> <span class=\"n\">constraints<\/span><span class=\"o\">)<\/span>\r\n                <span class=\"k\">if<\/span> <span class=\"o\">(!<\/span><span class=\"n\">done<\/span><span class=\"o\">.<\/span><span class=\"na\">contains<\/span><span class=\"o\">(<\/span><span class=\"n\">c<\/span><span class=\"o\">)<\/span> <span class=\"o\">&amp;&amp;<\/span> <span class=\"n\">bound<\/span><span class=\"o\">.<\/span><span class=\"na\">containsAll<\/span><span class=\"o\">(<\/span><span class=\"n\">c<\/span><span class=\"o\">.<\/span><span class=\"na\">variables<\/span><span class=\"o\">))<\/span> <span class=\"o\">{<\/span>\r\n                    <span class=\"n\">list<\/span><span class=\"o\">.<\/span><span class=\"na\">add<\/span><span class=\"o\">(<\/span><span class=\"n\">c<\/span><span class=\"o\">);<\/span>\r\n                    <span class=\"n\">done<\/span><span class=\"o\">.<\/span><span class=\"na\">add<\/span><span class=\"o\">(<\/span><span class=\"n\">c<\/span><span class=\"o\">);<\/span>\r\n                <span class=\"o\">}<\/span>\r\n        <span class=\"o\">}<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"n\">result<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"o\">}<\/span>\r\n\r\n    <span class=\"kd\">public<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">solve<\/span><span class=\"o\">(<\/span><span class=\"nc\">Problem<\/span> <span class=\"n\">problem<\/span><span class=\"o\">,<\/span> <span class=\"nc\">List<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Variable<\/span><span class=\"o\">&gt;<\/span> <span class=\"n\">bindingOrder<\/span><span class=\"o\">,<\/span> <span class=\"nc\">Answer<\/span> <span class=\"n\">answer<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"kt\">int<\/span> <span class=\"n\">variableSize<\/span> <span class=\"o\">=<\/span> <span class=\"n\">problem<\/span><span class=\"o\">.<\/span><span class=\"na\">variables<\/span><span class=\"o\">.<\/span><span class=\"na\">size<\/span><span class=\"o\">();<\/span>\r\n        <span class=\"nc\">List<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">List<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Constraint<\/span><span class=\"o\">&gt;&gt;<\/span> <span class=\"n\">constraintOrder<\/span> <span class=\"o\">=<\/span> <span class=\"n\">constraintOrder<\/span><span class=\"o\">(<\/span><span class=\"n\">bindingOrder<\/span><span class=\"o\">,<\/span> <span class=\"n\">problem<\/span><span class=\"o\">.<\/span><span class=\"na\">constraints<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"kt\">int<\/span><span class=\"o\">[]<\/span> <span class=\"n\">arguments<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"kt\">int<\/span><span class=\"o\">[<\/span><span class=\"n\">variableSize<\/span><span class=\"o\">];<\/span>\r\n        <span class=\"nc\">Map<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Variable<\/span><span class=\"o\">,<\/span> <span class=\"nc\">Integer<\/span><span class=\"o\">&gt;<\/span> <span class=\"n\">result<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">LinkedHashMap<\/span><span class=\"o\">&lt;&gt;(<\/span><span class=\"n\">variableSize<\/span><span class=\"o\">);<\/span>\r\n\r\n        <span class=\"k\">new<\/span> <span class=\"nf\">Object<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\r\n\r\n            <span class=\"kt\">boolean<\/span> <span class=\"nf\">test<\/span><span class=\"o\">(<\/span><span class=\"kt\">int<\/span> <span class=\"n\">i<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n                <span class=\"k\">for<\/span> <span class=\"o\">(<\/span><span class=\"nc\">Constraint<\/span> <span class=\"n\">c<\/span> <span class=\"o\">:<\/span> <span class=\"n\">constraintOrder<\/span><span class=\"o\">.<\/span><span class=\"na\">get<\/span><span class=\"o\">(<\/span><span class=\"n\">i<\/span><span class=\"o\">))<\/span> <span class=\"o\">{<\/span>\r\n                    <span class=\"kt\">int<\/span> <span class=\"n\">p<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"o\">;<\/span>\r\n                    <span class=\"k\">for<\/span> <span class=\"o\">(<\/span><span class=\"nc\">Variable<\/span> <span class=\"n\">v<\/span> <span class=\"o\">:<\/span> <span class=\"n\">c<\/span><span class=\"o\">.<\/span><span class=\"na\">variables<\/span><span class=\"o\">)<\/span>\r\n                        <span class=\"n\">arguments<\/span><span class=\"o\">[<\/span><span class=\"n\">p<\/span><span class=\"o\">++]<\/span> <span class=\"o\">=<\/span> <span class=\"n\">result<\/span><span class=\"o\">.<\/span><span class=\"na\">get<\/span><span class=\"o\">(<\/span><span class=\"n\">v<\/span><span class=\"o\">);<\/span>\r\n                    <span class=\"k\">if<\/span> <span class=\"o\">(!<\/span><span class=\"n\">c<\/span><span class=\"o\">.<\/span><span class=\"na\">predicate<\/span><span class=\"o\">.<\/span><span class=\"na\">test<\/span><span class=\"o\">(<\/span><span class=\"n\">arguments<\/span><span class=\"o\">))<\/span>\r\n                        <span class=\"k\">return<\/span> <span class=\"kc\">false<\/span><span class=\"o\">;<\/span>\r\n                <span class=\"o\">}<\/span>\r\n                <span class=\"k\">return<\/span> <span class=\"kc\">true<\/span><span class=\"o\">;<\/span>\r\n            <span class=\"o\">}<\/span>\r\n\r\n            <span class=\"kt\">void<\/span> <span class=\"nf\">solve<\/span><span class=\"o\">(<\/span><span class=\"kt\">int<\/span> <span class=\"n\">i<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n                <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"n\">i<\/span> <span class=\"o\">&gt;=<\/span> <span class=\"n\">variableSize<\/span><span class=\"o\">)<\/span>\r\n                    <span class=\"n\">answer<\/span><span class=\"o\">.<\/span><span class=\"na\">answer<\/span><span class=\"o\">(<\/span><span class=\"n\">result<\/span><span class=\"o\">);<\/span>\r\n                <span class=\"k\">else<\/span> <span class=\"o\">{<\/span>\r\n                    <span class=\"nc\">Variable<\/span> <span class=\"n\">v<\/span> <span class=\"o\">=<\/span> <span class=\"n\">bindingOrder<\/span><span class=\"o\">.<\/span><span class=\"na\">get<\/span><span class=\"o\">(<\/span><span class=\"n\">i<\/span><span class=\"o\">);<\/span>\r\n                    <span class=\"nc\">Domain<\/span> <span class=\"n\">d<\/span> <span class=\"o\">=<\/span> <span class=\"n\">v<\/span><span class=\"o\">.<\/span><span class=\"na\">domain<\/span><span class=\"o\">;<\/span>\r\n                    <span class=\"k\">for<\/span> <span class=\"o\">(<\/span><span class=\"kt\">int<\/span> <span class=\"n\">value<\/span> <span class=\"o\">:<\/span> <span class=\"n\">d<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n                        <span class=\"n\">result<\/span><span class=\"o\">.<\/span><span class=\"na\">put<\/span><span class=\"o\">(<\/span><span class=\"n\">v<\/span><span class=\"o\">,<\/span> <span class=\"n\">value<\/span><span class=\"o\">);<\/span>\r\n                        <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"n\">test<\/span><span class=\"o\">(<\/span><span class=\"n\">i<\/span><span class=\"o\">))<\/span>\r\n                            <span class=\"n\">solve<\/span><span class=\"o\">(<\/span><span class=\"n\">i<\/span> <span class=\"o\">+<\/span> <span class=\"mi\">1<\/span><span class=\"o\">);<\/span>\r\n                    <span class=\"o\">}<\/span>\r\n                <span class=\"o\">}<\/span>\r\n            <span class=\"o\">}<\/span>\r\n\r\n        <span class=\"o\">}.<\/span><span class=\"na\">solve<\/span><span class=\"o\">(<\/span><span class=\"mi\">0<\/span><span class=\"o\">);<\/span>\r\n    <span class=\"o\">}<\/span>\r\n\r\n    <span class=\"kd\">public<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">solve<\/span><span class=\"o\">(<\/span><span class=\"nc\">Problem<\/span> <span class=\"n\">problem<\/span><span class=\"o\">,<\/span> <span class=\"nc\">Answer<\/span> <span class=\"n\">answer<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"n\">solve<\/span><span class=\"o\">(<\/span><span class=\"n\">problem<\/span><span class=\"o\">,<\/span> <span class=\"n\">problem<\/span><span class=\"o\">.<\/span><span class=\"na\">variables<\/span><span class=\"o\">,<\/span> <span class=\"n\">answer<\/span><span class=\"o\">);<\/span>\r\n    <span class=\"o\">}<\/span>\r\n\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<h1>\u8003\u8bd5<\/h1>\n<p>\u8ba9\u6211\u4eec\u6765\u89e3\u51b3\u4e00\u4e2a\u7b80\u5355\u7684\u5b9e\u9645\u4f8b\u5b50\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nc\">Problem<\/span> <span class=\"n\">problem<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Problem<\/span><span class=\"o\">();<\/span>\r\n<span class=\"nc\">Domain<\/span> <span class=\"n\">domain<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">Domain<\/span><span class=\"o\">.<\/span><span class=\"na\">of<\/span><span class=\"o\">(<\/span><span class=\"mi\">1<\/span><span class=\"o\">,<\/span> <span class=\"mi\">2<\/span><span class=\"o\">,<\/span> <span class=\"mi\">3<\/span><span class=\"o\">);<\/span>\r\n<span class=\"nc\">Variable<\/span> <span class=\"no\">A<\/span> <span class=\"o\">=<\/span> <span class=\"n\">problem<\/span><span class=\"o\">.<\/span><span class=\"na\">variable<\/span><span class=\"o\">(<\/span><span class=\"s\">\"A\"<\/span><span class=\"o\">,<\/span> <span class=\"n\">domain<\/span><span class=\"o\">);<\/span>\r\n<span class=\"nc\">Variable<\/span> <span class=\"no\">B<\/span> <span class=\"o\">=<\/span> <span class=\"n\">problem<\/span><span class=\"o\">.<\/span><span class=\"na\">variable<\/span><span class=\"o\">(<\/span><span class=\"s\">\"B\"<\/span><span class=\"o\">,<\/span> <span class=\"n\">domain<\/span><span class=\"o\">);<\/span>\r\n<span class=\"nc\">Variable<\/span> <span class=\"no\">C<\/span> <span class=\"o\">=<\/span> <span class=\"n\">problem<\/span><span class=\"o\">.<\/span><span class=\"na\">variable<\/span><span class=\"o\">(<\/span><span class=\"s\">\"C\"<\/span><span class=\"o\">,<\/span> <span class=\"n\">domain<\/span><span class=\"o\">);<\/span>\r\n<span class=\"nc\">Constraint<\/span> <span class=\"no\">X<\/span> <span class=\"o\">=<\/span> <span class=\"n\">problem<\/span><span class=\"o\">.<\/span><span class=\"na\">constraint<\/span><span class=\"o\">(<\/span><span class=\"n\">a<\/span> <span class=\"o\">-&gt;<\/span> <span class=\"n\">a<\/span><span class=\"o\">[<\/span><span class=\"mi\">0<\/span><span class=\"o\">]<\/span> <span class=\"o\">+<\/span> <span class=\"n\">a<\/span><span class=\"o\">[<\/span><span class=\"mi\">1<\/span><span class=\"o\">]<\/span> <span class=\"o\">==<\/span> <span class=\"n\">a<\/span><span class=\"o\">[<\/span><span class=\"mi\">2<\/span><span class=\"o\">],<\/span> <span class=\"no\">A<\/span><span class=\"o\">,<\/span> <span class=\"no\">B<\/span><span class=\"o\">,<\/span> <span class=\"no\">C<\/span><span class=\"o\">);<\/span>\r\n<span class=\"nc\">Constraint<\/span> <span class=\"no\">Y<\/span> <span class=\"o\">=<\/span> <span class=\"n\">problem<\/span><span class=\"o\">.<\/span><span class=\"na\">constraint<\/span><span class=\"o\">(<\/span><span class=\"n\">a<\/span> <span class=\"o\">-&gt;<\/span> <span class=\"n\">a<\/span><span class=\"o\">[<\/span><span class=\"mi\">0<\/span><span class=\"o\">]<\/span> <span class=\"o\">&lt;<\/span> <span class=\"n\">a<\/span><span class=\"o\">[<\/span><span class=\"mi\">1<\/span><span class=\"o\">],<\/span> <span class=\"no\">A<\/span><span class=\"o\">,<\/span> <span class=\"no\">B<\/span><span class=\"o\">);<\/span>\r\n<span class=\"nc\">Solver<\/span> <span class=\"n\">solver<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Solver<\/span><span class=\"o\">();<\/span>\r\n<span class=\"n\">solver<\/span><span class=\"o\">.<\/span><span class=\"na\">solve<\/span><span class=\"o\">(<\/span><span class=\"n\">problem<\/span><span class=\"o\">,<\/span> <span class=\"n\">result<\/span> <span class=\"o\">-&gt;<\/span> <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">result<\/span><span class=\"o\">));<\/span>\r\n<\/code><\/pre>\n<p>\u7ed3\u679c\u5982\u4e0b\u3002<\/p>\n<pre class=\"post-pre\"><code>{A=1, B=2, C=3}\r\n<\/code><\/pre>\n<p>\u53d8\u91cf\u7684\u7ed1\u5b9a\u987a\u5e8f\u548c\u7ea6\u675f\u7684\u5e94\u7528\u987a\u5e8f\u5982\u4e0b\u6240\u793a\u3002<\/p>\n<p>0: A []<br \/>\n1: B [\u7ea6\u675f[A, B]]<br \/>\n2: C [\u7ea6\u675f[A, B, C]]<\/p>\n<h1>\u516b\u7687\u540e<\/h1>\n<p>\u30a8\u30a4\u30c8\u30fb\u30af\u30a4\u30fc\u30f3\u306f\u30c1\u30a7\u30b9\u306e\u76e4\u4e0a\u30678\u3064\u306e\u30af\u30a4\u30fc\u30f3\u3092\u914d\u7f6e\u3059\u308b\u554f\u984c\u3067\u3059\u3002\u30af\u30a4\u30fc\u30f3\u306f\u4e0a\u4e0b\u5de6\u53f3\u659c\u3081\u306e8\u65b9\u5411\u306b\u9032\u3080\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u304c\u3001\u4ed6\u306e\u99d2\u306b\u53d6\u3089\u308c\u308b\u3088\u3046\u306a\u4f4d\u7f6e\u306b\u306f\u914d\u7f6e\u3057\u3066\u306f\u3044\u3051\u307e\u305b\u3093\u3002\u3053\u308c\u306f\u5c06\u68cb\u306e\u98db\u8eca\u3068\u89d2\u884c\u3092\u5408\u308f\u305b\u305f\u52d5\u304d\u3068\u8a00\u3048\u307e\u3059\u3002\u307e\u305f\u3001\u4e00\u8fba\u306e\u30de\u30b9\u3092n\u3068\u3057\u305f\u5909\u5f62\u7248\u3092\u300cn-\u30af\u30a4\u30fc\u30f3\u300d\u3068\u547c\u3073\u307e\u3059\u3002<\/p>\n<p>n-\u30af\u30a4\u30fc\u30f3\u30d1\u30ba\u30eb\u3067\u306f\u3001n\u500b\u306e\u5909\u6570\u3092\u5b9a\u7fa9\u3057\u3001\u305d\u308c\u305e\u308c\u304c\u7570\u306a\u308b\u5024\u3092\u6301\u3061\u3001\u659c\u3081\u306b\u3082\u91cd\u306a\u3089\u306a\u3044\u3088\u3046\u306b\u914d\u7f6e\u3059\u308b\u554f\u984c\u3068\u3057\u3066\u89e3\u304b\u308c\u307e\u3059\u3002\u3053\u3053\u3067\u306fn\u306e\u5024\u304c1\u304b\u308910\u307e\u3067\u306e\u7bc4\u56f2\u3067\u3001\u305d\u308c\u305e\u308c\u306e\u89e3\u306e\u500b\u6570\u3092\u6c42\u3081\u3066\u307f\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">class<\/span> <span class=\"nc\">TestNQueens<\/span> <span class=\"o\">{<\/span>\r\n\r\n    <span class=\"kd\">static<\/span> <span class=\"nc\">Logger<\/span> <span class=\"n\">logger<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">Logger<\/span><span class=\"o\">.<\/span><span class=\"na\">getLogger<\/span><span class=\"o\">(<\/span><span class=\"nc\">TestNQueens<\/span><span class=\"o\">.<\/span><span class=\"na\">class<\/span><span class=\"o\">.<\/span><span class=\"na\">getName<\/span><span class=\"o\">());<\/span>\r\n\r\n    <span class=\"kd\">static<\/span> <span class=\"kt\">int<\/span> <span class=\"nf\">nQueens<\/span><span class=\"o\">(<\/span><span class=\"kd\">final<\/span> <span class=\"kt\">int<\/span> <span class=\"n\">n<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"kt\">long<\/span> <span class=\"n\">start<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">currentTimeMillis<\/span><span class=\"o\">();<\/span>\r\n        <span class=\"nc\">Problem<\/span> <span class=\"n\">problem<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Problem<\/span><span class=\"o\">();<\/span>\r\n        <span class=\"nc\">Domain<\/span> <span class=\"n\">domain<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">Domain<\/span><span class=\"o\">.<\/span><span class=\"na\">range<\/span><span class=\"o\">(<\/span><span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"n\">n<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"nc\">Variable<\/span><span class=\"o\">[]<\/span> <span class=\"n\">rows<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">IntStream<\/span><span class=\"o\">.<\/span><span class=\"na\">range<\/span><span class=\"o\">(<\/span><span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"n\">n<\/span><span class=\"o\">)<\/span>\r\n            <span class=\"o\">.<\/span><span class=\"na\">mapToObj<\/span><span class=\"o\">(<\/span><span class=\"n\">i<\/span> <span class=\"o\">-&gt;<\/span> <span class=\"n\">problem<\/span><span class=\"o\">.<\/span><span class=\"na\">variable<\/span><span class=\"o\">(<\/span><span class=\"s\">\"R\"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">i<\/span><span class=\"o\">,<\/span> <span class=\"n\">domain<\/span><span class=\"o\">))<\/span>\r\n            <span class=\"o\">.<\/span><span class=\"na\">toArray<\/span><span class=\"o\">(<\/span><span class=\"nc\">Variable<\/span><span class=\"o\">[]::<\/span><span class=\"k\">new<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"k\">for<\/span> <span class=\"o\">(<\/span><span class=\"kt\">int<\/span> <span class=\"n\">i<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"o\">;<\/span> <span class=\"n\">i<\/span> <span class=\"o\">&lt;<\/span> <span class=\"n\">n<\/span><span class=\"o\">;<\/span> <span class=\"o\">++<\/span><span class=\"n\">i<\/span><span class=\"o\">)<\/span>\r\n            <span class=\"k\">for<\/span> <span class=\"o\">(<\/span><span class=\"kt\">int<\/span> <span class=\"n\">j<\/span> <span class=\"o\">=<\/span> <span class=\"n\">i<\/span> <span class=\"o\">+<\/span> <span class=\"mi\">1<\/span><span class=\"o\">;<\/span> <span class=\"n\">j<\/span> <span class=\"o\">&lt;<\/span> <span class=\"n\">n<\/span><span class=\"o\">;<\/span> <span class=\"o\">++<\/span><span class=\"n\">j<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n                <span class=\"kt\">int<\/span> <span class=\"n\">distance<\/span> <span class=\"o\">=<\/span> <span class=\"n\">j<\/span> <span class=\"o\">-<\/span> <span class=\"n\">i<\/span><span class=\"o\">;<\/span>\r\n                <span class=\"n\">problem<\/span><span class=\"o\">.<\/span><span class=\"na\">constraint<\/span><span class=\"o\">(<\/span>\r\n                   <span class=\"o\">(<\/span><span class=\"n\">x<\/span><span class=\"o\">,<\/span> <span class=\"n\">y<\/span><span class=\"o\">)<\/span> <span class=\"o\">-&gt;<\/span> <span class=\"n\">x<\/span> <span class=\"o\">!=<\/span> <span class=\"n\">y<\/span> <span class=\"o\">&amp;&amp;<\/span> <span class=\"nc\">Math<\/span><span class=\"o\">.<\/span><span class=\"na\">abs<\/span><span class=\"o\">(<\/span><span class=\"n\">x<\/span> <span class=\"o\">-<\/span> <span class=\"n\">y<\/span><span class=\"o\">)<\/span> <span class=\"o\">!=<\/span> <span class=\"n\">distance<\/span><span class=\"o\">,<\/span> <span class=\"n\">rows<\/span><span class=\"o\">[<\/span><span class=\"n\">i<\/span><span class=\"o\">],<\/span> <span class=\"n\">rows<\/span><span class=\"o\">[<\/span><span class=\"n\">j<\/span><span class=\"o\">]);<\/span>\r\n            <span class=\"o\">}<\/span>\r\n        <span class=\"nc\">Solver<\/span> <span class=\"n\">solver<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Solver<\/span><span class=\"o\">();<\/span>\r\n        <span class=\"kt\">int<\/span><span class=\"o\">[]<\/span> <span class=\"n\">answers<\/span> <span class=\"o\">=<\/span> <span class=\"o\">{<\/span><span class=\"mi\">0<\/span><span class=\"o\">};<\/span>\r\n        <span class=\"n\">solver<\/span><span class=\"o\">.<\/span><span class=\"na\">solve<\/span><span class=\"o\">(<\/span><span class=\"n\">problem<\/span><span class=\"o\">,<\/span> <span class=\"n\">m<\/span> <span class=\"o\">-&gt;<\/span> <span class=\"o\">++<\/span><span class=\"n\">answers<\/span><span class=\"o\">[<\/span><span class=\"mi\">0<\/span><span class=\"o\">]);<\/span>\r\n        <span class=\"n\">logger<\/span><span class=\"o\">.<\/span><span class=\"na\">info<\/span><span class=\"o\">(<\/span><span class=\"s\">\"n=\"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">n<\/span> <span class=\"o\">+<\/span> <span class=\"s\">\" : answers=\"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">answers<\/span><span class=\"o\">[<\/span><span class=\"mi\">0<\/span><span class=\"o\">]<\/span>\r\n            <span class=\"o\">+<\/span> <span class=\"s\">\" : elapse=\"<\/span> <span class=\"o\">+<\/span> <span class=\"o\">(<\/span><span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">currentTimeMillis<\/span><span class=\"o\">()<\/span> <span class=\"o\">-<\/span> <span class=\"n\">start<\/span><span class=\"o\">)<\/span> <span class=\"o\">+<\/span> <span class=\"s\">\"ms.\"<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"n\">answers<\/span><span class=\"o\">[<\/span><span class=\"mi\">0<\/span><span class=\"o\">];<\/span>\r\n    <span class=\"o\">}<\/span>\r\n\r\n    <span class=\"nd\">@Test<\/span>\r\n    <span class=\"kt\">void<\/span> <span class=\"nf\">test<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"n\">assertEquals<\/span><span class=\"o\">(<\/span><span class=\"mi\">1<\/span><span class=\"o\">,<\/span> <span class=\"n\">nQueens<\/span><span class=\"o\">(<\/span><span class=\"mi\">1<\/span><span class=\"o\">));<\/span>\r\n        <span class=\"n\">assertEquals<\/span><span class=\"o\">(<\/span><span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"n\">nQueens<\/span><span class=\"o\">(<\/span><span class=\"mi\">2<\/span><span class=\"o\">));<\/span>\r\n        <span class=\"n\">assertEquals<\/span><span class=\"o\">(<\/span><span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"n\">nQueens<\/span><span class=\"o\">(<\/span><span class=\"mi\">3<\/span><span class=\"o\">));<\/span>\r\n        <span class=\"n\">assertEquals<\/span><span class=\"o\">(<\/span><span class=\"mi\">2<\/span><span class=\"o\">,<\/span> <span class=\"n\">nQueens<\/span><span class=\"o\">(<\/span><span class=\"mi\">4<\/span><span class=\"o\">));<\/span>\r\n        <span class=\"n\">assertEquals<\/span><span class=\"o\">(<\/span><span class=\"mi\">10<\/span><span class=\"o\">,<\/span> <span class=\"n\">nQueens<\/span><span class=\"o\">(<\/span><span class=\"mi\">5<\/span><span class=\"o\">));<\/span>\r\n        <span class=\"n\">assertEquals<\/span><span class=\"o\">(<\/span><span class=\"mi\">4<\/span><span class=\"o\">,<\/span> <span class=\"n\">nQueens<\/span><span class=\"o\">(<\/span><span class=\"mi\">6<\/span><span class=\"o\">));<\/span>\r\n        <span class=\"n\">assertEquals<\/span><span class=\"o\">(<\/span><span class=\"mi\">40<\/span><span class=\"o\">,<\/span> <span class=\"n\">nQueens<\/span><span class=\"o\">(<\/span><span class=\"mi\">7<\/span><span class=\"o\">));<\/span>\r\n        <span class=\"n\">assertEquals<\/span><span class=\"o\">(<\/span><span class=\"mi\">92<\/span><span class=\"o\">,<\/span> <span class=\"n\">nQueens<\/span><span class=\"o\">(<\/span><span class=\"mi\">8<\/span><span class=\"o\">));<\/span>\r\n        <span class=\"n\">assertEquals<\/span><span class=\"o\">(<\/span><span class=\"mi\">352<\/span><span class=\"o\">,<\/span> <span class=\"n\">nQueens<\/span><span class=\"o\">(<\/span><span class=\"mi\">9<\/span><span class=\"o\">));<\/span>\r\n        <span class=\"n\">assertEquals<\/span><span class=\"o\">(<\/span><span class=\"mi\">724<\/span><span class=\"o\">,<\/span> <span class=\"n\">nQueens<\/span><span class=\"o\">(<\/span><span class=\"mi\">10<\/span><span class=\"o\">));<\/span>\r\n    <span class=\"o\">}<\/span>\r\n\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<p>\u7ed3\u679c\u5982\u4e0b\u3002\u4e0e\u7ef4\u57fa\u767e\u79d1\u7684\u63cf\u8ff0\u76f8\u7b26\u3002<\/p>\n<pre class=\"post-pre\"><code>2020-05-19T16:31:06.863 \u60c5\u5831 n=1 : answers=1 : elapse=27ms. \r\n2020-05-19T16:31:06.941 \u60c5\u5831 n=2 : answers=0 : elapse=3ms. \r\n2020-05-19T16:31:06.942 \u60c5\u5831 n=3 : answers=0 : elapse=0ms. \r\n2020-05-19T16:31:06.944 \u60c5\u5831 n=4 : answers=2 : elapse=0ms. \r\n2020-05-19T16:31:06.947 \u60c5\u5831 n=5 : answers=10 : elapse=2ms. \r\n2020-05-19T16:31:06.953 \u60c5\u5831 n=6 : answers=4 : elapse=5ms. \r\n2020-05-19T16:31:06.963 \u60c5\u5831 n=7 : answers=40 : elapse=10ms. \r\n2020-05-19T16:31:06.984 \u60c5\u5831 n=8 : answers=92 : elapse=20ms. \r\n2020-05-19T16:31:07.031 \u60c5\u5831 n=9 : answers=352 : elapse=45ms. \r\n2020-05-19T16:31:07.118 \u60c5\u5831 n=10 : answers=724 : elapse=87ms. \r\n<\/code><\/pre>\n<h1>\u533f\u540d\u6570\u5b66\u9898<\/h1>\n<p>\u4e0b\u9762\u6211\u6765\u5c1d\u8bd5\u89e3\u7b54\u4e0b\u9762\u7684\u8c1c\u9898\u2014\u2014\u8457\u540d\u7684SEND MORE MONEY\u3002\uff08\u8fd9\u9053\u8c1c\u9898\u8981\u6c42\u4e3a\u6bcf\u4e2a\u5b57\u6bcd\u5206\u914d\u4e00\u4e2a\u6570\u5b57\uff0c\u4f7f\u5f97\u65b9\u7a0b\u6210\u7acb\u3002\u76f8\u540c\u7684\u5b57\u6bcd\u8981\u6709\u76f8\u540c\u7684\u6570\u5b57\uff0c\u4e0d\u540c\u7684\u5b57\u6bcd\u8981\u6709\u4e0d\u540c\u7684\u6570\u5b57\uff0c\u9996\u4f4d\u6570\u5b57\u4e0d\u80fd\u4e3a\u96f6\u3002\uff09<\/p>\n<pre class=\"post-pre\"><code>  SEND\r\n+ MORE\r\n------\r\n MONEY\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>    <span class=\"kd\">static<\/span> <span class=\"nc\">Logger<\/span> <span class=\"n\">logger<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">Logger<\/span><span class=\"o\">.<\/span><span class=\"na\">getLogger<\/span><span class=\"o\">(<\/span><span class=\"nc\">TestSendMoreMoney<\/span><span class=\"o\">.<\/span><span class=\"na\">class<\/span><span class=\"o\">.<\/span><span class=\"na\">getName<\/span><span class=\"o\">());<\/span>\r\n\r\n    <span class=\"kd\">static<\/span> <span class=\"kt\">int<\/span> <span class=\"nf\">number<\/span><span class=\"o\">(<\/span><span class=\"kt\">int<\/span><span class=\"o\">...<\/span> <span class=\"n\">digits<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"nc\">IntStream<\/span><span class=\"o\">.<\/span><span class=\"na\">of<\/span><span class=\"o\">(<\/span><span class=\"n\">digits<\/span><span class=\"o\">).<\/span><span class=\"na\">reduce<\/span><span class=\"o\">(<\/span><span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"o\">(<\/span><span class=\"n\">t<\/span><span class=\"o\">,<\/span> <span class=\"n\">d<\/span><span class=\"o\">)<\/span> <span class=\"o\">-&gt;<\/span> <span class=\"n\">t<\/span> <span class=\"o\">*<\/span> <span class=\"mi\">10<\/span> <span class=\"o\">+<\/span> <span class=\"n\">d<\/span><span class=\"o\">);<\/span>\r\n    <span class=\"o\">}<\/span>\r\n\r\n    <span class=\"nd\">@Test<\/span>\r\n    <span class=\"kd\">public<\/span> <span class=\"kt\">void<\/span> <span class=\"n\">test\u5358\u4e00\u5236\u7d04<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"nc\">Problem<\/span> <span class=\"n\">problem<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Problem<\/span><span class=\"o\">();<\/span>\r\n        <span class=\"nc\">Domain<\/span> <span class=\"n\">first<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">Domain<\/span><span class=\"o\">.<\/span><span class=\"na\">of<\/span><span class=\"o\">(<\/span><span class=\"mi\">1<\/span><span class=\"o\">,<\/span> <span class=\"mi\">2<\/span><span class=\"o\">,<\/span> <span class=\"mi\">3<\/span><span class=\"o\">,<\/span> <span class=\"mi\">4<\/span><span class=\"o\">,<\/span> <span class=\"mi\">5<\/span><span class=\"o\">,<\/span> <span class=\"mi\">6<\/span><span class=\"o\">,<\/span> <span class=\"mi\">7<\/span><span class=\"o\">,<\/span> <span class=\"mi\">8<\/span><span class=\"o\">,<\/span> <span class=\"mi\">9<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"nc\">Domain<\/span> <span class=\"n\">rest<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">Domain<\/span><span class=\"o\">.<\/span><span class=\"na\">of<\/span><span class=\"o\">(<\/span><span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">1<\/span><span class=\"o\">,<\/span> <span class=\"mi\">2<\/span><span class=\"o\">,<\/span> <span class=\"mi\">3<\/span><span class=\"o\">,<\/span> <span class=\"mi\">4<\/span><span class=\"o\">,<\/span> <span class=\"mi\">5<\/span><span class=\"o\">,<\/span> <span class=\"mi\">6<\/span><span class=\"o\">,<\/span> <span class=\"mi\">7<\/span><span class=\"o\">,<\/span> <span class=\"mi\">8<\/span><span class=\"o\">,<\/span> <span class=\"mi\">9<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"nc\">Variable<\/span> <span class=\"no\">S<\/span> <span class=\"o\">=<\/span> <span class=\"n\">problem<\/span><span class=\"o\">.<\/span><span class=\"na\">variable<\/span><span class=\"o\">(<\/span><span class=\"s\">\"S\"<\/span><span class=\"o\">,<\/span> <span class=\"n\">first<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"nc\">Variable<\/span> <span class=\"no\">E<\/span> <span class=\"o\">=<\/span> <span class=\"n\">problem<\/span><span class=\"o\">.<\/span><span class=\"na\">variable<\/span><span class=\"o\">(<\/span><span class=\"s\">\"E\"<\/span><span class=\"o\">,<\/span> <span class=\"n\">rest<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"nc\">Variable<\/span> <span class=\"no\">N<\/span> <span class=\"o\">=<\/span> <span class=\"n\">problem<\/span><span class=\"o\">.<\/span><span class=\"na\">variable<\/span><span class=\"o\">(<\/span><span class=\"s\">\"N\"<\/span><span class=\"o\">,<\/span> <span class=\"n\">rest<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"nc\">Variable<\/span> <span class=\"no\">D<\/span> <span class=\"o\">=<\/span> <span class=\"n\">problem<\/span><span class=\"o\">.<\/span><span class=\"na\">variable<\/span><span class=\"o\">(<\/span><span class=\"s\">\"D\"<\/span><span class=\"o\">,<\/span> <span class=\"n\">rest<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"nc\">Variable<\/span> <span class=\"no\">M<\/span> <span class=\"o\">=<\/span> <span class=\"n\">problem<\/span><span class=\"o\">.<\/span><span class=\"na\">variable<\/span><span class=\"o\">(<\/span><span class=\"s\">\"M\"<\/span><span class=\"o\">,<\/span> <span class=\"n\">first<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"nc\">Variable<\/span> <span class=\"no\">O<\/span> <span class=\"o\">=<\/span> <span class=\"n\">problem<\/span><span class=\"o\">.<\/span><span class=\"na\">variable<\/span><span class=\"o\">(<\/span><span class=\"s\">\"O\"<\/span><span class=\"o\">,<\/span> <span class=\"n\">rest<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"nc\">Variable<\/span> <span class=\"no\">R<\/span> <span class=\"o\">=<\/span> <span class=\"n\">problem<\/span><span class=\"o\">.<\/span><span class=\"na\">variable<\/span><span class=\"o\">(<\/span><span class=\"s\">\"R\"<\/span><span class=\"o\">,<\/span> <span class=\"n\">rest<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"nc\">Variable<\/span> <span class=\"no\">Y<\/span> <span class=\"o\">=<\/span> <span class=\"n\">problem<\/span><span class=\"o\">.<\/span><span class=\"na\">variable<\/span><span class=\"o\">(<\/span><span class=\"s\">\"Y\"<\/span><span class=\"o\">,<\/span> <span class=\"n\">rest<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"nc\">Variable<\/span><span class=\"o\">[]<\/span> <span class=\"n\">variables<\/span> <span class=\"o\">=<\/span> <span class=\"o\">{<\/span><span class=\"no\">S<\/span><span class=\"o\">,<\/span> <span class=\"no\">E<\/span><span class=\"o\">,<\/span> <span class=\"no\">N<\/span><span class=\"o\">,<\/span> <span class=\"no\">D<\/span><span class=\"o\">,<\/span> <span class=\"no\">M<\/span><span class=\"o\">,<\/span> <span class=\"no\">O<\/span><span class=\"o\">,<\/span> <span class=\"no\">R<\/span><span class=\"o\">,<\/span> <span class=\"no\">Y<\/span><span class=\"o\">};<\/span>\r\n        <span class=\"n\">problem<\/span><span class=\"o\">.<\/span><span class=\"na\">allDifferent<\/span><span class=\"o\">(<\/span><span class=\"n\">variables<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"n\">problem<\/span><span class=\"o\">.<\/span><span class=\"na\">constraint<\/span><span class=\"o\">(<\/span><span class=\"n\">a<\/span> <span class=\"o\">-&gt;<\/span>\r\n            <span class=\"n\">number<\/span><span class=\"o\">(<\/span><span class=\"n\">a<\/span><span class=\"o\">[<\/span><span class=\"mi\">0<\/span><span class=\"o\">],<\/span> <span class=\"n\">a<\/span><span class=\"o\">[<\/span><span class=\"mi\">1<\/span><span class=\"o\">],<\/span> <span class=\"n\">a<\/span><span class=\"o\">[<\/span><span class=\"mi\">2<\/span><span class=\"o\">],<\/span> <span class=\"n\">a<\/span><span class=\"o\">[<\/span><span class=\"mi\">3<\/span><span class=\"o\">])<\/span> <span class=\"o\">+<\/span> <span class=\"n\">number<\/span><span class=\"o\">(<\/span><span class=\"n\">a<\/span><span class=\"o\">[<\/span><span class=\"mi\">4<\/span><span class=\"o\">],<\/span> <span class=\"n\">a<\/span><span class=\"o\">[<\/span><span class=\"mi\">5<\/span><span class=\"o\">],<\/span> <span class=\"n\">a<\/span><span class=\"o\">[<\/span><span class=\"mi\">6<\/span><span class=\"o\">],<\/span> <span class=\"n\">a<\/span><span class=\"o\">[<\/span><span class=\"mi\">1<\/span><span class=\"o\">])<\/span>\r\n            <span class=\"o\">==<\/span> <span class=\"n\">number<\/span><span class=\"o\">(<\/span><span class=\"n\">a<\/span><span class=\"o\">[<\/span><span class=\"mi\">4<\/span><span class=\"o\">],<\/span> <span class=\"n\">a<\/span><span class=\"o\">[<\/span><span class=\"mi\">5<\/span><span class=\"o\">],<\/span> <span class=\"n\">a<\/span><span class=\"o\">[<\/span><span class=\"mi\">2<\/span><span class=\"o\">],<\/span> <span class=\"n\">a<\/span><span class=\"o\">[<\/span><span class=\"mi\">1<\/span><span class=\"o\">],<\/span> <span class=\"n\">a<\/span><span class=\"o\">[<\/span><span class=\"mi\">7<\/span><span class=\"o\">]),<\/span> <span class=\"n\">variables<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"nc\">Solver<\/span> <span class=\"n\">solver<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Solver<\/span><span class=\"o\">();<\/span>\r\n        <span class=\"n\">solver<\/span><span class=\"o\">.<\/span><span class=\"na\">solve<\/span><span class=\"o\">(<\/span><span class=\"n\">problem<\/span><span class=\"o\">,<\/span> <span class=\"n\">m<\/span> <span class=\"o\">-&gt;<\/span> <span class=\"n\">logger<\/span><span class=\"o\">.<\/span><span class=\"na\">info<\/span><span class=\"o\">(<\/span><span class=\"n\">m<\/span><span class=\"o\">.<\/span><span class=\"na\">toString<\/span><span class=\"o\">()));<\/span>\r\n    <span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<p>\u4e8b\u60c5\u5c31\u662f\u8fd9\u6837\u4e86\u3002 .)<\/p>\n<pre class=\"post-pre\"><code>{S=9, E=5, N=6, D=7, M=1, O=0, R=8, Y=2}\r\n<\/code><\/pre>\n<p>\u89e3\u51b3\u65b9\u6848\u53ea\u6709\u4e00\u4e2a\u7ea6\u675f\u6761\u4ef6\uff0c\u6240\u6709\u53d8\u91cf\u90fd\u5728\u7ea6\u675f\u7ed1\u5b9a\u540e\u8fdb\u884c\u68c0\u67e5\u3002\u6362\u53e5\u8bdd\u8bf4\uff0c\u7ea6\u675f\u68c0\u67e5\u5728\u6700\u5185\u5c42\u5faa\u73af\u4e2d\u8fdb\u884c\uff0c\u56e0\u6b64\u6548\u7387\u4e0d\u592a\u9ad8\u3002\u5728\u6211\u7684\u73af\u5883\u4e0b\uff0c\u9700\u8981\u5c11\u4e8e2\u79d2\u3002<\/p>\n<p>\u5982\u679c\u6dfb\u52a0\u8fdb\u4f4d\u53d8\u91cf\uff0c\u5e76\u4e14\u5c06\u7ea6\u675f\u5b9a\u4e49\u4e3a\u6bcf\u4e2a\u4f4d\u6570\uff0c\u5c06\u4f1a\u7a0d\u5fae\u63d0\u901f\u4e00\u4e9b\u3002<\/p>\n<pre class=\"post-pre\"><code>    <span class=\"nd\">@Test<\/span>\r\n    <span class=\"kd\">public<\/span> <span class=\"kt\">void<\/span> <span class=\"n\">test\u6841\u3054\u3068\u306e\u5236\u7d04<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"nc\">Domain<\/span> <span class=\"n\">zero<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">Domain<\/span><span class=\"o\">.<\/span><span class=\"na\">of<\/span><span class=\"o\">(<\/span><span class=\"mi\">0<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"nc\">Domain<\/span> <span class=\"n\">first<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">Domain<\/span><span class=\"o\">.<\/span><span class=\"na\">of<\/span><span class=\"o\">(<\/span><span class=\"mi\">1<\/span><span class=\"o\">,<\/span> <span class=\"mi\">2<\/span><span class=\"o\">,<\/span> <span class=\"mi\">3<\/span><span class=\"o\">,<\/span> <span class=\"mi\">4<\/span><span class=\"o\">,<\/span> <span class=\"mi\">5<\/span><span class=\"o\">,<\/span> <span class=\"mi\">6<\/span><span class=\"o\">,<\/span> <span class=\"mi\">7<\/span><span class=\"o\">,<\/span> <span class=\"mi\">8<\/span><span class=\"o\">,<\/span> <span class=\"mi\">9<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"nc\">Domain<\/span> <span class=\"n\">rest<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">Domain<\/span><span class=\"o\">.<\/span><span class=\"na\">of<\/span><span class=\"o\">(<\/span><span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">1<\/span><span class=\"o\">,<\/span> <span class=\"mi\">2<\/span><span class=\"o\">,<\/span> <span class=\"mi\">3<\/span><span class=\"o\">,<\/span> <span class=\"mi\">4<\/span><span class=\"o\">,<\/span> <span class=\"mi\">5<\/span><span class=\"o\">,<\/span> <span class=\"mi\">6<\/span><span class=\"o\">,<\/span> <span class=\"mi\">7<\/span><span class=\"o\">,<\/span> <span class=\"mi\">8<\/span><span class=\"o\">,<\/span> <span class=\"mi\">9<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"nc\">Domain<\/span> <span class=\"n\">carry<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">Domain<\/span><span class=\"o\">.<\/span><span class=\"na\">of<\/span><span class=\"o\">(<\/span><span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">1<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"nc\">Problem<\/span> <span class=\"n\">problem<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Problem<\/span><span class=\"o\">();<\/span>\r\n        <span class=\"nc\">Variable<\/span> <span class=\"no\">Z<\/span> <span class=\"o\">=<\/span> <span class=\"n\">problem<\/span><span class=\"o\">.<\/span><span class=\"na\">variable<\/span><span class=\"o\">(<\/span><span class=\"s\">\"Z\"<\/span><span class=\"o\">,<\/span> <span class=\"n\">zero<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"nc\">Variable<\/span> <span class=\"no\">C1<\/span> <span class=\"o\">=<\/span> <span class=\"n\">problem<\/span><span class=\"o\">.<\/span><span class=\"na\">variable<\/span><span class=\"o\">(<\/span><span class=\"s\">\"C1\"<\/span><span class=\"o\">,<\/span> <span class=\"n\">carry<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"nc\">Variable<\/span> <span class=\"no\">C2<\/span> <span class=\"o\">=<\/span> <span class=\"n\">problem<\/span><span class=\"o\">.<\/span><span class=\"na\">variable<\/span><span class=\"o\">(<\/span><span class=\"s\">\"C2\"<\/span><span class=\"o\">,<\/span> <span class=\"n\">carry<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"nc\">Variable<\/span> <span class=\"no\">C3<\/span> <span class=\"o\">=<\/span> <span class=\"n\">problem<\/span><span class=\"o\">.<\/span><span class=\"na\">variable<\/span><span class=\"o\">(<\/span><span class=\"s\">\"C3\"<\/span><span class=\"o\">,<\/span> <span class=\"n\">carry<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"nc\">Variable<\/span> <span class=\"no\">C4<\/span> <span class=\"o\">=<\/span> <span class=\"n\">problem<\/span><span class=\"o\">.<\/span><span class=\"na\">variable<\/span><span class=\"o\">(<\/span><span class=\"s\">\"C4\"<\/span><span class=\"o\">,<\/span> <span class=\"n\">carry<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"nc\">Variable<\/span> <span class=\"no\">S<\/span> <span class=\"o\">=<\/span> <span class=\"n\">problem<\/span><span class=\"o\">.<\/span><span class=\"na\">variable<\/span><span class=\"o\">(<\/span><span class=\"s\">\"S\"<\/span><span class=\"o\">,<\/span> <span class=\"n\">first<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"nc\">Variable<\/span> <span class=\"no\">E<\/span> <span class=\"o\">=<\/span> <span class=\"n\">problem<\/span><span class=\"o\">.<\/span><span class=\"na\">variable<\/span><span class=\"o\">(<\/span><span class=\"s\">\"E\"<\/span><span class=\"o\">,<\/span> <span class=\"n\">rest<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"nc\">Variable<\/span> <span class=\"no\">N<\/span> <span class=\"o\">=<\/span> <span class=\"n\">problem<\/span><span class=\"o\">.<\/span><span class=\"na\">variable<\/span><span class=\"o\">(<\/span><span class=\"s\">\"N\"<\/span><span class=\"o\">,<\/span> <span class=\"n\">rest<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"nc\">Variable<\/span> <span class=\"no\">D<\/span> <span class=\"o\">=<\/span> <span class=\"n\">problem<\/span><span class=\"o\">.<\/span><span class=\"na\">variable<\/span><span class=\"o\">(<\/span><span class=\"s\">\"D\"<\/span><span class=\"o\">,<\/span> <span class=\"n\">rest<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"nc\">Variable<\/span> <span class=\"no\">M<\/span> <span class=\"o\">=<\/span> <span class=\"n\">problem<\/span><span class=\"o\">.<\/span><span class=\"na\">variable<\/span><span class=\"o\">(<\/span><span class=\"s\">\"M\"<\/span><span class=\"o\">,<\/span> <span class=\"n\">first<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"nc\">Variable<\/span> <span class=\"no\">O<\/span> <span class=\"o\">=<\/span> <span class=\"n\">problem<\/span><span class=\"o\">.<\/span><span class=\"na\">variable<\/span><span class=\"o\">(<\/span><span class=\"s\">\"O\"<\/span><span class=\"o\">,<\/span> <span class=\"n\">rest<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"nc\">Variable<\/span> <span class=\"no\">R<\/span> <span class=\"o\">=<\/span> <span class=\"n\">problem<\/span><span class=\"o\">.<\/span><span class=\"na\">variable<\/span><span class=\"o\">(<\/span><span class=\"s\">\"R\"<\/span><span class=\"o\">,<\/span> <span class=\"n\">rest<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"nc\">Variable<\/span> <span class=\"no\">Y<\/span> <span class=\"o\">=<\/span> <span class=\"n\">problem<\/span><span class=\"o\">.<\/span><span class=\"na\">variable<\/span><span class=\"o\">(<\/span><span class=\"s\">\"Y\"<\/span><span class=\"o\">,<\/span> <span class=\"n\">rest<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"nc\">Variable<\/span><span class=\"o\">[]<\/span> <span class=\"n\">variables<\/span> <span class=\"o\">=<\/span> <span class=\"o\">{<\/span><span class=\"no\">S<\/span><span class=\"o\">,<\/span> <span class=\"no\">E<\/span><span class=\"o\">,<\/span> <span class=\"no\">N<\/span><span class=\"o\">,<\/span> <span class=\"no\">D<\/span><span class=\"o\">,<\/span> <span class=\"no\">M<\/span><span class=\"o\">,<\/span> <span class=\"no\">O<\/span><span class=\"o\">,<\/span> <span class=\"no\">R<\/span><span class=\"o\">,<\/span> <span class=\"no\">Y<\/span><span class=\"o\">};<\/span>\r\n        <span class=\"n\">problem<\/span><span class=\"o\">.<\/span><span class=\"na\">allDifferent<\/span><span class=\"o\">(<\/span><span class=\"n\">variables<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"c1\">\/\/  C4 C3 C2 C1  Z<\/span>\r\n        <span class=\"c1\">\/\/   Z  S  E  N  D<\/span>\r\n        <span class=\"c1\">\/\/ + Z  M  O  R  E<\/span>\r\n        <span class=\"c1\">\/\/ ---------------<\/span>\r\n        <span class=\"c1\">\/\/   M  O  N  E  Y<\/span>\r\n        <span class=\"nc\">Predicate<\/span> <span class=\"n\">digitPredicate<\/span> <span class=\"o\">=<\/span> <span class=\"n\">a<\/span> <span class=\"o\">-&gt;<\/span> <span class=\"n\">a<\/span><span class=\"o\">[<\/span><span class=\"mi\">0<\/span><span class=\"o\">]<\/span> <span class=\"o\">+<\/span> <span class=\"n\">a<\/span><span class=\"o\">[<\/span><span class=\"mi\">1<\/span><span class=\"o\">]<\/span> <span class=\"o\">+<\/span> <span class=\"n\">a<\/span><span class=\"o\">[<\/span><span class=\"mi\">2<\/span><span class=\"o\">]<\/span> <span class=\"o\">==<\/span> <span class=\"n\">a<\/span><span class=\"o\">[<\/span><span class=\"mi\">3<\/span><span class=\"o\">]<\/span> <span class=\"o\">+<\/span> <span class=\"n\">a<\/span><span class=\"o\">[<\/span><span class=\"mi\">4<\/span><span class=\"o\">]<\/span> <span class=\"o\">*<\/span> <span class=\"mi\">10<\/span><span class=\"o\">;<\/span>\r\n        <span class=\"n\">problem<\/span><span class=\"o\">.<\/span><span class=\"na\">constraint<\/span><span class=\"o\">(<\/span><span class=\"n\">digitPredicate<\/span><span class=\"o\">,<\/span> <span class=\"no\">Z<\/span><span class=\"o\">,<\/span> <span class=\"no\">D<\/span><span class=\"o\">,<\/span> <span class=\"no\">E<\/span><span class=\"o\">,<\/span> <span class=\"no\">Y<\/span><span class=\"o\">,<\/span> <span class=\"no\">C1<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"n\">problem<\/span><span class=\"o\">.<\/span><span class=\"na\">constraint<\/span><span class=\"o\">(<\/span><span class=\"n\">digitPredicate<\/span><span class=\"o\">,<\/span> <span class=\"no\">C1<\/span><span class=\"o\">,<\/span> <span class=\"no\">N<\/span><span class=\"o\">,<\/span> <span class=\"no\">R<\/span><span class=\"o\">,<\/span> <span class=\"no\">E<\/span><span class=\"o\">,<\/span> <span class=\"no\">C2<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"n\">problem<\/span><span class=\"o\">.<\/span><span class=\"na\">constraint<\/span><span class=\"o\">(<\/span><span class=\"n\">digitPredicate<\/span><span class=\"o\">,<\/span> <span class=\"no\">C2<\/span><span class=\"o\">,<\/span> <span class=\"no\">E<\/span><span class=\"o\">,<\/span> <span class=\"no\">O<\/span><span class=\"o\">,<\/span> <span class=\"no\">N<\/span><span class=\"o\">,<\/span> <span class=\"no\">C3<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"n\">problem<\/span><span class=\"o\">.<\/span><span class=\"na\">constraint<\/span><span class=\"o\">(<\/span><span class=\"n\">digitPredicate<\/span><span class=\"o\">,<\/span> <span class=\"no\">C3<\/span><span class=\"o\">,<\/span> <span class=\"no\">S<\/span><span class=\"o\">,<\/span> <span class=\"no\">M<\/span><span class=\"o\">,<\/span> <span class=\"no\">O<\/span><span class=\"o\">,<\/span> <span class=\"no\">C4<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"n\">problem<\/span><span class=\"o\">.<\/span><span class=\"na\">constraint<\/span><span class=\"o\">(<\/span><span class=\"n\">digitPredicate<\/span><span class=\"o\">,<\/span> <span class=\"no\">C4<\/span><span class=\"o\">,<\/span> <span class=\"no\">Z<\/span><span class=\"o\">,<\/span> <span class=\"no\">Z<\/span><span class=\"o\">,<\/span> <span class=\"no\">M<\/span><span class=\"o\">,<\/span> <span class=\"no\">Z<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"nc\">Solver<\/span> <span class=\"n\">solver<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Solver<\/span><span class=\"o\">();<\/span>\r\n        <span class=\"n\">solver<\/span><span class=\"o\">.<\/span><span class=\"na\">solve<\/span><span class=\"o\">(<\/span><span class=\"n\">problem<\/span><span class=\"o\">,<\/span> <span class=\"n\">m<\/span> <span class=\"o\">-&gt;<\/span> <span class=\"n\">logger<\/span><span class=\"o\">.<\/span><span class=\"na\">info<\/span><span class=\"o\">(<\/span><span class=\"n\">m<\/span><span class=\"o\">.<\/span><span class=\"na\">toString<\/span><span class=\"o\">()));<\/span>\r\n    <span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<p>\u6211\u5df2\u7ecf\u80fd\u5728\u5927\u7ea60.3\u79d2\u7684\u65f6\u95f4\u5185\u89e3\u51b3\u4e86\u3002<\/p>\n<h1>\u6570\u72ec\u53ef\u4ee5\u6982\u62ec\u4e3a\u4e00\u79cd\u903b\u8f91\u62fc\u56fe\u6e38\u620f\u3002<\/h1>\n<p>\u6211\u5c06\u5c1d\u8bd5\u89e3\u7b54\u7ef4\u57fa\u767e\u79d1\u4e0a\u6570\u72ec\u9875\u9762\u4e2d\u7684\u7b2c\u4e00\u4e2a\u95ee\u9898\u3002<\/p>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d0d0e37434c4406bea24a\/58-0.png\" alt=\"image.png\" \/><\/div>\n<pre class=\"post-pre\"><code>    <span class=\"kd\">static<\/span> <span class=\"nc\">Logger<\/span> <span class=\"n\">logger<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">Logger<\/span><span class=\"o\">.<\/span><span class=\"na\">getLogger<\/span><span class=\"o\">(<\/span><span class=\"nc\">Test\u6570\u72ec<\/span><span class=\"o\">.<\/span><span class=\"na\">class<\/span><span class=\"o\">.<\/span><span class=\"na\">toString<\/span><span class=\"o\">());<\/span>\r\n\r\n    <span class=\"kd\">static<\/span> <span class=\"kt\">int<\/span> <span class=\"n\">\u8fba\u306e\u9577\u3055<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">9<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"kd\">static<\/span> <span class=\"kt\">int<\/span> <span class=\"n\">\u5c0f\u56db\u89d2\u5f62\u306e\u8fba\u306e\u9577\u3055<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">3<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"kd\">static<\/span> <span class=\"nc\">Domain<\/span> <span class=\"n\">\u5b9a\u7fa9\u57df<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">Domain<\/span><span class=\"o\">.<\/span><span class=\"na\">rangeClosed<\/span><span class=\"o\">(<\/span><span class=\"mi\">1<\/span><span class=\"o\">,<\/span> <span class=\"mi\">9<\/span><span class=\"o\">);<\/span>\r\n\r\n    <span class=\"kd\">static<\/span> <span class=\"nc\">String<\/span> <span class=\"n\">\u540d\u524d<\/span><span class=\"o\">(<\/span><span class=\"kt\">int<\/span> <span class=\"n\">r<\/span><span class=\"o\">,<\/span> <span class=\"kt\">int<\/span> <span class=\"n\">c<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"n\">r<\/span> <span class=\"o\">+<\/span> <span class=\"s\">\"@\"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">c<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"o\">}<\/span>\r\n\r\n    <span class=\"kd\">static<\/span> <span class=\"nc\">Variable<\/span><span class=\"o\">[][]<\/span> <span class=\"n\">\u5909\u6570\u5b9a\u7fa9<\/span><span class=\"o\">(<\/span><span class=\"nc\">Problem<\/span> <span class=\"n\">\u554f\u984c<\/span><span class=\"o\">,<\/span> <span class=\"kt\">int<\/span><span class=\"o\">[][]<\/span> <span class=\"n\">\u5165\u529b<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"nc\">Variable<\/span><span class=\"o\">[][]<\/span> <span class=\"n\">\u5909\u6570<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Variable<\/span><span class=\"o\">[<\/span><span class=\"n\">\u8fba\u306e\u9577\u3055<\/span><span class=\"o\">][<\/span><span class=\"n\">\u8fba\u306e\u9577\u3055<\/span><span class=\"o\">];<\/span>\r\n        <span class=\"k\">for<\/span> <span class=\"o\">(<\/span><span class=\"kt\">int<\/span> <span class=\"n\">r<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"o\">;<\/span> <span class=\"n\">r<\/span> <span class=\"o\">&lt;<\/span> <span class=\"n\">\u8fba\u306e\u9577\u3055<\/span><span class=\"o\">;<\/span> <span class=\"o\">++<\/span><span class=\"n\">r<\/span><span class=\"o\">)<\/span>\r\n            <span class=\"k\">for<\/span> <span class=\"o\">(<\/span><span class=\"kt\">int<\/span> <span class=\"n\">c<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"o\">;<\/span> <span class=\"n\">c<\/span> <span class=\"o\">&lt;<\/span> <span class=\"n\">\u8fba\u306e\u9577\u3055<\/span><span class=\"o\">;<\/span> <span class=\"o\">++<\/span><span class=\"n\">c<\/span><span class=\"o\">)<\/span>\r\n                <span class=\"n\">\u5909\u6570<\/span><span class=\"o\">[<\/span><span class=\"n\">r<\/span><span class=\"o\">][<\/span><span class=\"n\">c<\/span><span class=\"o\">]<\/span> <span class=\"o\">=<\/span> <span class=\"n\">\u554f\u984c<\/span><span class=\"o\">.<\/span><span class=\"na\">variable<\/span><span class=\"o\">(<\/span><span class=\"n\">\u540d\u524d<\/span><span class=\"o\">(<\/span><span class=\"n\">r<\/span><span class=\"o\">,<\/span> <span class=\"n\">c<\/span><span class=\"o\">),<\/span>\r\n                    <span class=\"n\">\u5165\u529b<\/span><span class=\"o\">[<\/span><span class=\"n\">r<\/span><span class=\"o\">][<\/span><span class=\"n\">c<\/span><span class=\"o\">]<\/span> <span class=\"o\">==<\/span> <span class=\"mi\">0<\/span> <span class=\"o\">?<\/span> <span class=\"n\">\u5b9a\u7fa9\u57df<\/span> <span class=\"o\">:<\/span> <span class=\"nc\">Domain<\/span><span class=\"o\">.<\/span><span class=\"na\">of<\/span><span class=\"o\">(<\/span><span class=\"n\">\u5165\u529b<\/span><span class=\"o\">[<\/span><span class=\"n\">r<\/span><span class=\"o\">][<\/span><span class=\"n\">c<\/span><span class=\"o\">]));<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"n\">\u5909\u6570<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"o\">}<\/span>\r\n\r\n    <span class=\"kd\">static<\/span> <span class=\"nc\">List<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Variable<\/span><span class=\"o\">[]&gt;<\/span> <span class=\"n\">\u5236\u7d04\u5b9a\u7fa9<\/span><span class=\"o\">(<\/span><span class=\"nc\">Problem<\/span> <span class=\"n\">\u554f\u984c<\/span><span class=\"o\">,<\/span> <span class=\"nc\">Variable<\/span><span class=\"o\">[][]<\/span> <span class=\"n\">\u5909\u6570<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"nc\">List<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Variable<\/span><span class=\"o\">[]&gt;<\/span> <span class=\"n\">\u5236\u7d04\u5909\u6570<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">ArrayList<\/span><span class=\"o\">&lt;&gt;();<\/span>\r\n        <span class=\"k\">for<\/span> <span class=\"o\">(<\/span><span class=\"kt\">int<\/span> <span class=\"n\">r<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"o\">;<\/span> <span class=\"n\">r<\/span> <span class=\"o\">&lt;<\/span> <span class=\"n\">\u8fba\u306e\u9577\u3055<\/span><span class=\"o\">;<\/span> <span class=\"o\">++<\/span><span class=\"n\">r<\/span><span class=\"o\">)<\/span>\r\n            <span class=\"n\">\u5236\u7d04\u5909\u6570<\/span><span class=\"o\">.<\/span><span class=\"na\">add<\/span><span class=\"o\">(<\/span><span class=\"n\">\u5909\u6570<\/span><span class=\"o\">[<\/span><span class=\"n\">r<\/span><span class=\"o\">]);<\/span>\r\n        <span class=\"k\">for<\/span> <span class=\"o\">(<\/span><span class=\"kt\">int<\/span> <span class=\"n\">c<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"o\">;<\/span> <span class=\"n\">c<\/span> <span class=\"o\">&lt;<\/span> <span class=\"n\">\u8fba\u306e\u9577\u3055<\/span><span class=\"o\">;<\/span> <span class=\"o\">++<\/span><span class=\"n\">c<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n            <span class=\"nc\">Variable<\/span><span class=\"o\">[]<\/span> <span class=\"n\">va<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Variable<\/span><span class=\"o\">[<\/span><span class=\"n\">\u8fba\u306e\u9577\u3055<\/span><span class=\"o\">];<\/span>\r\n            <span class=\"n\">\u5236\u7d04\u5909\u6570<\/span><span class=\"o\">.<\/span><span class=\"na\">add<\/span><span class=\"o\">(<\/span><span class=\"n\">va<\/span><span class=\"o\">);<\/span>\r\n            <span class=\"k\">for<\/span> <span class=\"o\">(<\/span><span class=\"kt\">int<\/span> <span class=\"n\">r<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"o\">;<\/span> <span class=\"n\">r<\/span> <span class=\"o\">&lt;<\/span> <span class=\"n\">\u8fba\u306e\u9577\u3055<\/span><span class=\"o\">;<\/span> <span class=\"o\">++<\/span><span class=\"n\">r<\/span><span class=\"o\">)<\/span>\r\n                <span class=\"n\">va<\/span><span class=\"o\">[<\/span><span class=\"n\">r<\/span><span class=\"o\">]<\/span> <span class=\"o\">=<\/span> <span class=\"n\">\u5909\u6570<\/span><span class=\"o\">[<\/span><span class=\"n\">r<\/span><span class=\"o\">][<\/span><span class=\"n\">c<\/span><span class=\"o\">];<\/span>\r\n        <span class=\"o\">}<\/span>\r\n        <span class=\"k\">for<\/span> <span class=\"o\">(<\/span><span class=\"kt\">int<\/span> <span class=\"n\">r<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"o\">;<\/span> <span class=\"n\">r<\/span> <span class=\"o\">&lt;<\/span> <span class=\"n\">\u8fba\u306e\u9577\u3055<\/span><span class=\"o\">;<\/span> <span class=\"n\">r<\/span> <span class=\"o\">+=<\/span> <span class=\"n\">\u5c0f\u56db\u89d2\u5f62\u306e\u8fba\u306e\u9577\u3055<\/span><span class=\"o\">)<\/span>\r\n            <span class=\"k\">for<\/span> <span class=\"o\">(<\/span><span class=\"kt\">int<\/span> <span class=\"n\">c<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"o\">;<\/span> <span class=\"n\">c<\/span> <span class=\"o\">&lt;<\/span> <span class=\"n\">\u8fba\u306e\u9577\u3055<\/span><span class=\"o\">;<\/span> <span class=\"n\">c<\/span> <span class=\"o\">+=<\/span> <span class=\"n\">\u5c0f\u56db\u89d2\u5f62\u306e\u8fba\u306e\u9577\u3055<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n                <span class=\"nc\">Variable<\/span><span class=\"o\">[]<\/span> <span class=\"n\">va<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Variable<\/span><span class=\"o\">[<\/span><span class=\"n\">\u8fba\u306e\u9577\u3055<\/span><span class=\"o\">];<\/span>\r\n                <span class=\"n\">\u5236\u7d04\u5909\u6570<\/span><span class=\"o\">.<\/span><span class=\"na\">add<\/span><span class=\"o\">(<\/span><span class=\"n\">va<\/span><span class=\"o\">);<\/span>\r\n                <span class=\"k\">for<\/span> <span class=\"o\">(<\/span><span class=\"kt\">int<\/span> <span class=\"n\">i<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"n\">p<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"o\">;<\/span> <span class=\"n\">i<\/span> <span class=\"o\">&lt;<\/span> <span class=\"n\">\u5c0f\u56db\u89d2\u5f62\u306e\u8fba\u306e\u9577\u3055<\/span><span class=\"o\">;<\/span> <span class=\"o\">++<\/span><span class=\"n\">i<\/span><span class=\"o\">)<\/span>\r\n                    <span class=\"k\">for<\/span> <span class=\"o\">(<\/span><span class=\"kt\">int<\/span> <span class=\"n\">j<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"o\">;<\/span> <span class=\"n\">j<\/span> <span class=\"o\">&lt;<\/span> <span class=\"n\">\u5c0f\u56db\u89d2\u5f62\u306e\u8fba\u306e\u9577\u3055<\/span><span class=\"o\">;<\/span> <span class=\"o\">++<\/span><span class=\"n\">j<\/span><span class=\"o\">,<\/span> <span class=\"o\">++<\/span><span class=\"n\">p<\/span><span class=\"o\">)<\/span>\r\n                        <span class=\"n\">va<\/span><span class=\"o\">[<\/span><span class=\"n\">p<\/span><span class=\"o\">]<\/span> <span class=\"o\">=<\/span> <span class=\"n\">\u5909\u6570<\/span><span class=\"o\">[<\/span><span class=\"n\">r<\/span> <span class=\"o\">+<\/span> <span class=\"n\">i<\/span><span class=\"o\">][<\/span><span class=\"n\">c<\/span> <span class=\"o\">+<\/span> <span class=\"n\">j<\/span><span class=\"o\">];<\/span>\r\n            <span class=\"o\">}<\/span>\r\n        <span class=\"k\">for<\/span> <span class=\"o\">(<\/span><span class=\"nc\">Variable<\/span><span class=\"o\">[]<\/span> <span class=\"n\">va<\/span> <span class=\"o\">:<\/span> <span class=\"n\">\u5236\u7d04\u5909\u6570<\/span><span class=\"o\">)<\/span>\r\n            <span class=\"n\">\u554f\u984c<\/span><span class=\"o\">.<\/span><span class=\"na\">allDifferent<\/span><span class=\"o\">(<\/span><span class=\"n\">va<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"n\">\u5236\u7d04\u5909\u6570<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"o\">}<\/span>\r\n\r\n    <span class=\"kd\">static<\/span> <span class=\"kt\">void<\/span> <span class=\"n\">\u7b54<\/span><span class=\"o\">(<\/span><span class=\"nc\">Variable<\/span><span class=\"o\">[][]<\/span> <span class=\"n\">\u5909\u6570<\/span><span class=\"o\">,<\/span> <span class=\"nc\">Map<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Variable<\/span><span class=\"o\">,<\/span> <span class=\"nc\">Integer<\/span><span class=\"o\">&gt;<\/span> <span class=\"n\">\u89e3\u7b54<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"k\">for<\/span> <span class=\"o\">(<\/span><span class=\"kt\">int<\/span> <span class=\"n\">r<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"o\">;<\/span> <span class=\"n\">r<\/span> <span class=\"o\">&lt;<\/span> <span class=\"n\">\u8fba\u306e\u9577\u3055<\/span><span class=\"o\">;<\/span> <span class=\"o\">++<\/span><span class=\"n\">r<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n            <span class=\"nc\">StringBuilder<\/span> <span class=\"n\">sb<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">StringBuilder<\/span><span class=\"o\">();<\/span>\r\n            <span class=\"k\">for<\/span> <span class=\"o\">(<\/span><span class=\"kt\">int<\/span> <span class=\"n\">c<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"o\">;<\/span> <span class=\"n\">c<\/span> <span class=\"o\">&lt;<\/span> <span class=\"n\">\u8fba\u306e\u9577\u3055<\/span><span class=\"o\">;<\/span> <span class=\"o\">++<\/span><span class=\"n\">c<\/span><span class=\"o\">)<\/span>\r\n                <span class=\"n\">sb<\/span><span class=\"o\">.<\/span><span class=\"na\">append<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span><span class=\"o\">.<\/span><span class=\"na\">format<\/span><span class=\"o\">(<\/span><span class=\"s\">\"%2d\"<\/span><span class=\"o\">,<\/span> <span class=\"n\">\u89e3\u7b54<\/span><span class=\"o\">.<\/span><span class=\"na\">get<\/span><span class=\"o\">(<\/span><span class=\"n\">\u5909\u6570<\/span><span class=\"o\">[<\/span><span class=\"n\">r<\/span><span class=\"o\">][<\/span><span class=\"n\">c<\/span><span class=\"o\">])));<\/span>\r\n            <span class=\"n\">logger<\/span><span class=\"o\">.<\/span><span class=\"na\">info<\/span><span class=\"o\">(<\/span><span class=\"n\">sb<\/span><span class=\"o\">.<\/span><span class=\"na\">toString<\/span><span class=\"o\">());<\/span>\r\n        <span class=\"o\">}<\/span>\r\n    <span class=\"o\">}<\/span>\r\n\r\n    <span class=\"kd\">static<\/span> <span class=\"kt\">void<\/span> <span class=\"n\">\u6570\u72ec\u675f\u7e1b\u9806\u5e8f\u6307\u5b9a\u306a\u3057<\/span><span class=\"o\">(<\/span><span class=\"kt\">int<\/span><span class=\"o\">[][]<\/span> <span class=\"n\">\u5165\u529b<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"nc\">Problem<\/span> <span class=\"n\">\u554f\u984c<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Problem<\/span><span class=\"o\">();<\/span>\r\n        <span class=\"nc\">Variable<\/span><span class=\"o\">[][]<\/span> <span class=\"n\">\u5909\u6570<\/span> <span class=\"o\">=<\/span> <span class=\"n\">\u5909\u6570\u5b9a\u7fa9<\/span><span class=\"o\">(<\/span><span class=\"n\">\u554f\u984c<\/span><span class=\"o\">,<\/span> <span class=\"n\">\u5165\u529b<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"n\">\u5236\u7d04\u5b9a\u7fa9<\/span><span class=\"o\">(<\/span><span class=\"n\">\u554f\u984c<\/span><span class=\"o\">,<\/span> <span class=\"n\">\u5909\u6570<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"nc\">Solver<\/span> <span class=\"n\">\u89e3\u6c7a<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Solver<\/span><span class=\"o\">();<\/span>\r\n        <span class=\"n\">\u89e3\u6c7a<\/span><span class=\"o\">.<\/span><span class=\"na\">solve<\/span><span class=\"o\">(<\/span><span class=\"n\">\u554f\u984c<\/span><span class=\"o\">,<\/span> <span class=\"n\">m<\/span> <span class=\"o\">-&gt;<\/span> <span class=\"n\">\u7b54<\/span><span class=\"o\">(<\/span><span class=\"n\">\u5909\u6570<\/span><span class=\"o\">,<\/span> <span class=\"n\">m<\/span><span class=\"o\">));<\/span>\r\n    <span class=\"o\">}<\/span>\r\n\r\n    <span class=\"nd\">@Test<\/span>\r\n    <span class=\"kt\">void<\/span> <span class=\"n\">testWikipedia\u675f\u7e1b\u9806\u5e8f\u6307\u5b9a\u306a\u3057<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"c1\">\/\/ Wikipedia \u6570\u72ec \u306e\u4f8b\u984c<\/span>\r\n        <span class=\"c1\">\/\/ https:\/\/ja.wikipedia.org\/wiki\/%E6%95%B0%E7%8B%AC<\/span>\r\n        <span class=\"kt\">int<\/span><span class=\"o\">[][]<\/span> <span class=\"n\">\u5165\u529b<\/span> <span class=\"o\">=<\/span> <span class=\"o\">{<\/span>\r\n            <span class=\"o\">{<\/span> <span class=\"mi\">5<\/span><span class=\"o\">,<\/span> <span class=\"mi\">3<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">7<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span> <span class=\"o\">},<\/span>\r\n            <span class=\"o\">{<\/span> <span class=\"mi\">6<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">1<\/span><span class=\"o\">,<\/span> <span class=\"mi\">9<\/span><span class=\"o\">,<\/span> <span class=\"mi\">5<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span> <span class=\"o\">},<\/span>\r\n            <span class=\"o\">{<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">9<\/span><span class=\"o\">,<\/span> <span class=\"mi\">8<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">6<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span> <span class=\"o\">},<\/span>\r\n            <span class=\"o\">{<\/span> <span class=\"mi\">8<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">6<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">3<\/span> <span class=\"o\">},<\/span>\r\n            <span class=\"o\">{<\/span> <span class=\"mi\">4<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">8<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">3<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">1<\/span> <span class=\"o\">},<\/span>\r\n            <span class=\"o\">{<\/span> <span class=\"mi\">7<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">2<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">6<\/span> <span class=\"o\">},<\/span>\r\n            <span class=\"o\">{<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">6<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">2<\/span><span class=\"o\">,<\/span> <span class=\"mi\">8<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span> <span class=\"o\">},<\/span>\r\n            <span class=\"o\">{<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">4<\/span><span class=\"o\">,<\/span> <span class=\"mi\">1<\/span><span class=\"o\">,<\/span> <span class=\"mi\">9<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">5<\/span> <span class=\"o\">},<\/span>\r\n            <span class=\"o\">{<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">8<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">7<\/span><span class=\"o\">,<\/span> <span class=\"mi\">9<\/span> <span class=\"o\">},<\/span>\r\n        <span class=\"o\">};<\/span>\r\n        <span class=\"n\">logger<\/span><span class=\"o\">.<\/span><span class=\"na\">info<\/span><span class=\"o\">(<\/span><span class=\"s\">\"test wikipedia\"<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"n\">\u6570\u72ec\u675f\u7e1b\u9806\u5e8f\u6307\u5b9a\u306a\u3057<\/span><span class=\"o\">(<\/span><span class=\"n\">\u5165\u529b<\/span><span class=\"o\">);<\/span>\r\n    <span class=\"o\">}<\/span>\r\n\r\n<\/code><\/pre>\n<p>\u6682\u65f6\u89e3\u51b3\u4e86\uff0c\u4f46\u82b1\u4e86\u8d85\u8fc720\u79d2\u7684\u65f6\u95f4\u3002<\/p>\n<pre class=\"post-pre\"><code>2020-05-16T21:01:31.789 \u60c5\u5831 test wikipedia \r\n2020-05-16T21:01:52.360 \u60c5\u5831  5 3 4 6 7 8 9 1 2 \r\n2020-05-16T21:01:52.361 \u60c5\u5831  6 7 2 1 9 5 3 4 8 \r\n2020-05-16T21:01:52.361 \u60c5\u5831  1 9 8 3 4 2 5 6 7 \r\n2020-05-16T21:01:52.362 \u60c5\u5831  8 5 9 7 6 1 4 2 3 \r\n2020-05-16T21:01:52.363 \u60c5\u5831  4 2 6 8 5 3 7 9 1 \r\n2020-05-16T21:01:52.363 \u60c5\u5831  7 1 3 9 2 4 8 5 6 \r\n2020-05-16T21:01:52.363 \u60c5\u5831  9 6 1 5 3 7 2 8 4 \r\n2020-05-16T21:01:52.364 \u60c5\u5831  2 8 7 4 1 9 6 3 5 \r\n2020-05-16T21:01:52.365 \u60c5\u5831  3 4 5 2 8 6 1 7 9 \r\n<\/code><\/pre>\n<p>\u53d8\u91cf\u7684\u7ed1\u5b9a\u987a\u5e8f\u7b80\u5355\u5730\u4ece\u4e0a\u5230\u4e0b\uff0c\u4ece\u5de6\u5230\u53f3\uff0c\u56e0\u6b64\u6211\u4f1a\u7a0d\u4f5c\u6539\u53d8\u3002<br \/>\n\u6211\u5c06\u6309\u7167\u4ee5\u4e0b\u7b56\u7565\u6765\u5b9a\u4e49\u7ed1\u5b9a\u987a\u5e8f\u3002<\/p>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d0d0e37434c4406bea24a\/63-0.png\" alt=\"image.png\" \/><\/div>\n<p>\u4ee5\u4e0b\u662f\u6839\u636e\u8fd9\u4e2a\u65b9\u9488\u6539\u53d8\u53d8\u91cf\u7ed1\u5b9a\u987a\u5e8f\u7684\u4ee3\u7801\u3002<\/p>\n<pre class=\"post-pre\"><code>    <span class=\"kd\">static<\/span> <span class=\"nc\">List<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Variable<\/span><span class=\"o\">&gt;<\/span> <span class=\"n\">\u675f\u7e1b\u9806\u5e8f\u5b9a\u7fa9<\/span><span class=\"o\">(<\/span><span class=\"nc\">List<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Variable<\/span><span class=\"o\">&gt;<\/span> <span class=\"n\">\u5909\u6570<\/span><span class=\"o\">,<\/span> <span class=\"nc\">List<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Variable<\/span><span class=\"o\">[]&gt;<\/span> <span class=\"n\">\u5236\u7d04\u5909\u6570<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"nc\">Set<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Variable<\/span><span class=\"o\">&gt;<\/span> <span class=\"n\">\u675f\u7e1b\u9806\u5e8f<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">LinkedHashSet<\/span><span class=\"o\">&lt;&gt;();<\/span>\r\n        <span class=\"k\">for<\/span> <span class=\"o\">(<\/span><span class=\"nc\">Variable<\/span> <span class=\"n\">v<\/span> <span class=\"o\">:<\/span> <span class=\"n\">\u5909\u6570<\/span><span class=\"o\">)<\/span>\r\n            <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"n\">v<\/span><span class=\"o\">.<\/span><span class=\"na\">domain<\/span><span class=\"o\">.<\/span><span class=\"na\">size<\/span><span class=\"o\">()<\/span> <span class=\"o\">==<\/span> <span class=\"mi\">1<\/span><span class=\"o\">)<\/span>\r\n                <span class=\"n\">\u675f\u7e1b\u9806\u5e8f<\/span><span class=\"o\">.<\/span><span class=\"na\">add<\/span><span class=\"o\">(<\/span><span class=\"n\">v<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"nc\">Collections<\/span><span class=\"o\">.<\/span><span class=\"na\">sort<\/span><span class=\"o\">(<\/span><span class=\"n\">\u5236\u7d04\u5909\u6570<\/span><span class=\"o\">,<\/span>\r\n            <span class=\"nc\">Comparator<\/span><span class=\"o\">.<\/span><span class=\"na\">comparingInt<\/span><span class=\"o\">(<\/span><span class=\"n\">a<\/span> <span class=\"o\">-&gt;<\/span> <span class=\"nc\">Arrays<\/span><span class=\"o\">.<\/span><span class=\"na\">stream<\/span><span class=\"o\">(<\/span><span class=\"n\">a<\/span><span class=\"o\">).<\/span><span class=\"na\">mapToInt<\/span><span class=\"o\">(<\/span><span class=\"n\">v<\/span> <span class=\"o\">-&gt;<\/span> <span class=\"n\">v<\/span><span class=\"o\">.<\/span><span class=\"na\">domain<\/span><span class=\"o\">.<\/span><span class=\"na\">size<\/span><span class=\"o\">()).<\/span><span class=\"na\">sum<\/span><span class=\"o\">()));<\/span>\r\n        <span class=\"k\">for<\/span> <span class=\"o\">(<\/span><span class=\"nc\">Variable<\/span><span class=\"o\">[]<\/span> <span class=\"n\">a<\/span> <span class=\"o\">:<\/span> <span class=\"n\">\u5236\u7d04\u5909\u6570<\/span><span class=\"o\">)<\/span>\r\n            <span class=\"k\">for<\/span> <span class=\"o\">(<\/span><span class=\"nc\">Variable<\/span> <span class=\"n\">v<\/span> <span class=\"o\">:<\/span> <span class=\"n\">a<\/span><span class=\"o\">)<\/span>\r\n                <span class=\"n\">\u675f\u7e1b\u9806\u5e8f<\/span><span class=\"o\">.<\/span><span class=\"na\">add<\/span><span class=\"o\">(<\/span><span class=\"n\">v<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">ArrayList<\/span><span class=\"o\">&lt;&gt;(<\/span><span class=\"n\">\u675f\u7e1b\u9806\u5e8f<\/span><span class=\"o\">);<\/span>\r\n    <span class=\"o\">}<\/span>\r\n\r\n    <span class=\"kd\">static<\/span> <span class=\"kt\">void<\/span> <span class=\"n\">\u6570\u72ec\u675f\u7e1b\u9806\u5e8f\u6307\u5b9a\u3042\u308a<\/span><span class=\"o\">(<\/span><span class=\"kt\">int<\/span><span class=\"o\">[][]<\/span> <span class=\"n\">\u5165\u529b<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"nc\">Problem<\/span> <span class=\"n\">\u554f\u984c<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Problem<\/span><span class=\"o\">();<\/span>\r\n        <span class=\"nc\">Variable<\/span><span class=\"o\">[][]<\/span> <span class=\"n\">\u5909\u6570<\/span> <span class=\"o\">=<\/span> <span class=\"n\">\u5909\u6570\u5b9a\u7fa9<\/span><span class=\"o\">(<\/span><span class=\"n\">\u554f\u984c<\/span><span class=\"o\">,<\/span> <span class=\"n\">\u5165\u529b<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"nc\">List<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Variable<\/span><span class=\"o\">[]&gt;<\/span> <span class=\"n\">\u5236\u7d04\u5909\u6570<\/span> <span class=\"o\">=<\/span> <span class=\"n\">\u5236\u7d04\u5b9a\u7fa9<\/span><span class=\"o\">(<\/span><span class=\"n\">\u554f\u984c<\/span><span class=\"o\">,<\/span> <span class=\"n\">\u5909\u6570<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"nc\">List<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Variable<\/span><span class=\"o\">&gt;<\/span> <span class=\"n\">\u675f\u7e1b\u9806\u5e8f<\/span> <span class=\"o\">=<\/span> <span class=\"n\">\u675f\u7e1b\u9806\u5e8f\u5b9a\u7fa9<\/span><span class=\"o\">(<\/span><span class=\"n\">\u554f\u984c<\/span><span class=\"o\">.<\/span><span class=\"na\">variables<\/span><span class=\"o\">,<\/span> <span class=\"n\">\u5236\u7d04\u5909\u6570<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"nc\">Solver<\/span> <span class=\"n\">\u89e3\u6c7a<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Solver<\/span><span class=\"o\">();<\/span>\r\n        <span class=\"n\">\u89e3\u6c7a<\/span><span class=\"o\">.<\/span><span class=\"na\">solve<\/span><span class=\"o\">(<\/span><span class=\"n\">\u554f\u984c<\/span><span class=\"o\">,<\/span> <span class=\"n\">\u675f\u7e1b\u9806\u5e8f<\/span><span class=\"o\">,<\/span> <span class=\"n\">m<\/span> <span class=\"o\">-&gt;<\/span> <span class=\"n\">\u7b54<\/span><span class=\"o\">(<\/span><span class=\"n\">\u5909\u6570<\/span><span class=\"o\">,<\/span> <span class=\"n\">m<\/span><span class=\"o\">));<\/span>\r\n    <span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<p>\u7ed3\u679c\u662f\u5728\u5927\u7ea60.02\u79d2\u5185\u89e3\u51b3\u4e86\u3002\u8fd9\u4e2a\u4f8b\u5b50\u592a\u7b80\u5355\u4e86\uff0c\u6240\u4ee5\u6211\u5c1d\u8bd5\u4e86\u66f4\u56f0\u96be\u7684\u95ee\u9898\u3002\u6839\u636e\u7ef4\u57fa\u767e\u79d1\uff0c\u6570\u72ec\u7684\u89e3\u5fc5\u987b\u62e5\u6709\u81f3\u5c1117\u4e2a\u5df2\u77e5\u7684\u6570\u5b57\u683c\u5b50\u624d\u80fd\u4fdd\u8bc1\u552f\u4e00\u6027\u3002<br \/>\n\u6211\u5728\u7f51\u4e0a\u641c\u7d22\u4e86\u4e00\u4e2a\u6070\u597d\u670917\u4e2a\u5df2\u77e5\u6570\u5b57\u7684\u590d\u6742\u95ee\u9898\u3002<\/p>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d0d0e37434c4406bea24a\/67-0.png\" alt=\"image.png\" \/><\/div>\n<pre class=\"post-pre\"><code>    <span class=\"nd\">@Test<\/span>\r\n    <span class=\"kt\">void<\/span> <span class=\"nf\">testGood_at_Sudoku_Heres_some_youll_never_complete<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"c1\">\/\/ http:\/\/theconversation.com\/good-at-sudoku-heres-some-youll-never-complete-5234<\/span>\r\n        <span class=\"kt\">int<\/span><span class=\"o\">[][]<\/span> <span class=\"n\">\u5165\u529b<\/span> <span class=\"o\">=<\/span> <span class=\"o\">{<\/span>\r\n            <span class=\"o\">{<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">7<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span> <span class=\"o\">},<\/span>\r\n            <span class=\"o\">{<\/span> <span class=\"mi\">1<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span> <span class=\"o\">},<\/span>\r\n            <span class=\"o\">{<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">4<\/span><span class=\"o\">,<\/span> <span class=\"mi\">3<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">2<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span> <span class=\"o\">},<\/span>\r\n            <span class=\"o\">{<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">6<\/span> <span class=\"o\">},<\/span>\r\n            <span class=\"o\">{<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">5<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">9<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span> <span class=\"o\">},<\/span>\r\n            <span class=\"o\">{<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">4<\/span><span class=\"o\">,<\/span> <span class=\"mi\">1<\/span><span class=\"o\">,<\/span> <span class=\"mi\">8<\/span> <span class=\"o\">},<\/span>\r\n            <span class=\"o\">{<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">8<\/span><span class=\"o\">,<\/span> <span class=\"mi\">1<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span> <span class=\"o\">},<\/span>\r\n            <span class=\"o\">{<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">2<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">5<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span> <span class=\"o\">},<\/span>\r\n            <span class=\"o\">{<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">4<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">3<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span> <span class=\"o\">},<\/span>\r\n        <span class=\"o\">};<\/span>\r\n        <span class=\"n\">logger<\/span><span class=\"o\">.<\/span><span class=\"na\">info<\/span><span class=\"o\">(<\/span><span class=\"s\">\"Good at Sudoku Heres some youll never complete\"<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"n\">\u6570\u72ec\u675f\u7e1b\u9806\u5e8f\u6307\u5b9a\u3042\u308a<\/span><span class=\"o\">(<\/span><span class=\"n\">\u5165\u529b<\/span><span class=\"o\">);<\/span>\r\n    <span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<p>\u6211\u80fd\u5728\u4e00\u79d2\u949f\u5185\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u3002<\/p>\n<pre class=\"post-pre\"><code>2020-05-16T21:22:26.176 \u60c5\u5831 Good at Sudoku Heres some youll never complete \r\n2020-05-16T21:22:26.310 \u60c5\u5831  2 6 4 7 1 5 8 3 9 \r\n2020-05-16T21:22:26.311 \u60c5\u5831  1 3 7 8 9 2 6 4 5 \r\n2020-05-16T21:22:26.312 \u60c5\u5831  5 9 8 4 3 6 2 7 1 \r\n2020-05-16T21:22:26.313 \u60c5\u5831  4 2 3 1 7 8 5 9 6 \r\n2020-05-16T21:22:26.315 \u60c5\u5831  8 1 6 5 4 9 7 2 3 \r\n2020-05-16T21:22:26.316 \u60c5\u5831  7 5 9 6 2 3 4 1 8 \r\n2020-05-16T21:22:26.317 \u60c5\u5831  3 7 5 2 8 1 9 6 4 \r\n2020-05-16T21:22:26.318 \u60c5\u5831  9 8 2 3 6 4 1 5 7 \r\n2020-05-16T21:22:26.320 \u60c5\u5831  6 4 1 9 5 7 3 8 2 \r\n<\/code><\/pre>\n<p>\u5982\u679c\u4e0d\u6307\u5b9a\u53d8\u91cf\u7684\u7ed1\u5b9a\u987a\u5e8f\uff0c\u5373\u4f7f\u8fc7\u4e8610\u5206\u949f\u4e5f\u5f97\u4e0d\u5230\u89e3\u7b54\u3002<\/p>\n<h1>\u6539\u5584\u9650\u5236\u8868\u8fbe<\/h1>\n<p>\u5728\u5b9a\u4e49\u7ea6\u675f\u65f6\uff0c\u9700\u8981\u6307\u5b9a\u4e0eLambda\u8868\u8fbe\u5f0f\u76f8\u5173\u7684\u53d8\u91cf\u3002\u7531\u4e8e\u53d7\u7ea6\u675f\u7684\u53d8\u91cf\u6570\u91cf\u662f\u53ef\u53d8\u7684\uff0c\u56e0\u6b64\u91c7\u7528\u8fd9\u79cd\u5199\u6cd5\u3002<\/p>\n<pre class=\"post-pre\"><code>        <span class=\"n\">problem<\/span><span class=\"o\">.<\/span><span class=\"na\">constraint<\/span><span class=\"o\">(<\/span><span class=\"n\">a<\/span> <span class=\"o\">-&gt;<\/span>\r\n            <span class=\"n\">number<\/span><span class=\"o\">(<\/span><span class=\"n\">a<\/span><span class=\"o\">[<\/span><span class=\"mi\">0<\/span><span class=\"o\">],<\/span> <span class=\"n\">a<\/span><span class=\"o\">[<\/span><span class=\"mi\">1<\/span><span class=\"o\">],<\/span> <span class=\"n\">a<\/span><span class=\"o\">[<\/span><span class=\"mi\">2<\/span><span class=\"o\">],<\/span> <span class=\"n\">a<\/span><span class=\"o\">[<\/span><span class=\"mi\">3<\/span><span class=\"o\">])<\/span>\r\n            <span class=\"o\">+<\/span> <span class=\"n\">number<\/span><span class=\"o\">(<\/span><span class=\"n\">a<\/span><span class=\"o\">[<\/span><span class=\"mi\">4<\/span><span class=\"o\">],<\/span> <span class=\"n\">a<\/span><span class=\"o\">[<\/span><span class=\"mi\">5<\/span><span class=\"o\">],<\/span> <span class=\"n\">a<\/span><span class=\"o\">[<\/span><span class=\"mi\">6<\/span><span class=\"o\">],<\/span> <span class=\"n\">a<\/span><span class=\"o\">[<\/span><span class=\"mi\">1<\/span><span class=\"o\">])<\/span>\r\n            <span class=\"o\">==<\/span> <span class=\"n\">number<\/span><span class=\"o\">(<\/span><span class=\"n\">a<\/span><span class=\"o\">[<\/span><span class=\"mi\">4<\/span><span class=\"o\">],<\/span> <span class=\"n\">a<\/span><span class=\"o\">[<\/span><span class=\"mi\">5<\/span><span class=\"o\">],<\/span> <span class=\"n\">a<\/span><span class=\"o\">[<\/span><span class=\"mi\">2<\/span><span class=\"o\">],<\/span> <span class=\"n\">a<\/span><span class=\"o\">[<\/span><span class=\"mi\">1<\/span><span class=\"o\">],<\/span> <span class=\"n\">a<\/span><span class=\"o\">[<\/span><span class=\"mi\">7<\/span><span class=\"o\">]),<\/span>\r\n            <span class=\"no\">S<\/span><span class=\"o\">,<\/span> <span class=\"no\">E<\/span><span class=\"o\">,<\/span> <span class=\"no\">N<\/span><span class=\"o\">,<\/span> <span class=\"no\">D<\/span><span class=\"o\">,<\/span> <span class=\"no\">M<\/span><span class=\"o\">,<\/span> <span class=\"no\">O<\/span><span class=\"o\">,<\/span> <span class=\"no\">R<\/span><span class=\"o\">,<\/span> <span class=\"no\">Y<\/span><span class=\"o\">);<\/span>\r\n<\/code><\/pre>\n<p>\u4e3a\u4e86\u6539\u5584\u8fd9\u79cd\u96be\u4ee5\u7406\u89e3\u7684\u8868\u8fbe\u65b9\u5f0f\uff0c\u6211\u5c06\u6dfb\u52a0\u4e00\u4e2a\u56fa\u5b9a\u957f\u5ea6\u53c2\u6570\u7684\u65b9\u6cd5\u3002\u9996\u5148\uff0c\u6211\u4eec\u8981\u6dfb\u52a0\u4ee5\u4e0b\u63a5\u53e3\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nd\">@FunctionalInterface<\/span>\r\n<span class=\"kd\">public<\/span> <span class=\"kd\">interface<\/span> <span class=\"nc\">Predicate1<\/span> <span class=\"kd\">extends<\/span> <span class=\"nc\">Predicate<\/span> <span class=\"o\">{<\/span>\r\n\r\n    <span class=\"k\">default<\/span> <span class=\"kt\">boolean<\/span> <span class=\"nf\">test<\/span><span class=\"o\">(<\/span><span class=\"kt\">int<\/span><span class=\"o\">...<\/span> <span class=\"n\">values<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"nf\">test<\/span><span class=\"o\">(<\/span><span class=\"n\">values<\/span><span class=\"o\">[<\/span><span class=\"mi\">0<\/span><span class=\"o\">]);<\/span>\r\n    <span class=\"o\">}<\/span>\r\n\r\n    <span class=\"kt\">boolean<\/span> <span class=\"nf\">test<\/span><span class=\"o\">(<\/span><span class=\"kt\">int<\/span> <span class=\"n\">a<\/span><span class=\"o\">);<\/span>\r\n\r\n<span class=\"o\">}<\/span>\r\n\r\n<span class=\"nd\">@FunctionalInterface<\/span>\r\n<span class=\"kd\">public<\/span> <span class=\"kd\">interface<\/span> <span class=\"nc\">Predicate2<\/span> <span class=\"kd\">extends<\/span> <span class=\"nc\">Predicate<\/span> <span class=\"o\">{<\/span>\r\n\r\n    <span class=\"k\">default<\/span> <span class=\"kt\">boolean<\/span> <span class=\"nf\">test<\/span><span class=\"o\">(<\/span><span class=\"kt\">int<\/span><span class=\"o\">...<\/span> <span class=\"n\">values<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"nf\">test<\/span><span class=\"o\">(<\/span><span class=\"n\">values<\/span><span class=\"o\">[<\/span><span class=\"mi\">0<\/span><span class=\"o\">],<\/span> <span class=\"n\">values<\/span><span class=\"o\">[<\/span><span class=\"mi\">1<\/span><span class=\"o\">]);<\/span>\r\n    <span class=\"o\">}<\/span>\r\n\r\n    <span class=\"kt\">boolean<\/span> <span class=\"nf\">test<\/span><span class=\"o\">(<\/span><span class=\"kt\">int<\/span> <span class=\"n\">a<\/span><span class=\"o\">,<\/span> <span class=\"kt\">int<\/span> <span class=\"n\">b<\/span><span class=\"o\">);<\/span>\r\n\r\n<span class=\"o\">}<\/span>\r\n\r\n<span class=\"o\">.....<\/span>\r\n<\/code><\/pre>\n<p>\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u5c06\u5728Problem\u7c7b\u4e2d\u6dfb\u52a0\u4e00\u4e2a\u4f7f\u7528\u8fd9\u4e2a\u7ea6\u675f\u7684\u5de5\u5382\u65b9\u6cd5\u3002<\/p>\n<pre class=\"post-pre\"><code>    <span class=\"kd\">public<\/span> <span class=\"nc\">Constraint<\/span> <span class=\"nf\">constraint<\/span><span class=\"o\">(<\/span><span class=\"nc\">Predicate1<\/span> <span class=\"n\">predicate<\/span><span class=\"o\">,<\/span> <span class=\"nc\">Variable<\/span> <span class=\"n\">a<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"nf\">constraint<\/span><span class=\"o\">((<\/span><span class=\"nc\">Predicate<\/span><span class=\"o\">)<\/span><span class=\"n\">predicate<\/span><span class=\"o\">,<\/span> <span class=\"n\">a<\/span><span class=\"o\">);<\/span>\r\n    <span class=\"o\">}<\/span>\r\n\r\n    <span class=\"kd\">public<\/span> <span class=\"nc\">Constraint<\/span> <span class=\"nf\">constraint<\/span><span class=\"o\">(<\/span><span class=\"nc\">Predicate2<\/span> <span class=\"n\">predicate<\/span><span class=\"o\">,<\/span> <span class=\"nc\">Variable<\/span> <span class=\"n\">a<\/span><span class=\"o\">,<\/span> <span class=\"nc\">Variable<\/span> <span class=\"n\">b<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"nf\">constraint<\/span><span class=\"o\">((<\/span><span class=\"nc\">Predicate<\/span><span class=\"o\">)<\/span><span class=\"n\">predicate<\/span><span class=\"o\">,<\/span> <span class=\"n\">a<\/span><span class=\"o\">,<\/span> <span class=\"n\">b<\/span><span class=\"o\">);<\/span>\r\n    <span class=\"o\">}<\/span>\r\n\r\n    <span class=\"o\">.....<\/span>\r\n<\/code><\/pre>\n<p>\u5982\u679c\u8fd9\u6837\u505a\uff0c\u5c31\u53ef\u4ee5\u5b9e\u73b0\u8fd9\u6837\u7684\u5199\u6cd5\u3002\u5982\u679c\u4f20\u7ed9constraint()\u65b9\u6cd5\u7684Variable\u6570\u91cf\u4e0eLambda\u8868\u8fbe\u5f0f\u7684\u53c2\u6570\u6570\u91cf\u4e0d\u4e00\u81f4\uff0c\u5c06\u5bfc\u81f4\u7f16\u8bd1\u9519\u8bef\u3002<\/p>\n<pre class=\"post-pre\"><code>        <span class=\"n\">problem<\/span><span class=\"o\">.<\/span><span class=\"na\">constraint<\/span><span class=\"o\">((<\/span><span class=\"n\">s<\/span><span class=\"o\">,<\/span> <span class=\"n\">e<\/span><span class=\"o\">,<\/span> <span class=\"n\">n<\/span><span class=\"o\">,<\/span> <span class=\"n\">d<\/span><span class=\"o\">,<\/span> <span class=\"n\">m<\/span><span class=\"o\">,<\/span> <span class=\"n\">o<\/span><span class=\"o\">,<\/span> <span class=\"n\">r<\/span><span class=\"o\">,<\/span> <span class=\"n\">y<\/span><span class=\"o\">)<\/span> <span class=\"o\">-&gt;<\/span>\r\n            <span class=\"n\">number<\/span><span class=\"o\">(<\/span><span class=\"n\">s<\/span><span class=\"o\">,<\/span> <span class=\"n\">e<\/span><span class=\"o\">,<\/span> <span class=\"n\">n<\/span><span class=\"o\">,<\/span> <span class=\"n\">d<\/span><span class=\"o\">)<\/span>\r\n            <span class=\"o\">+<\/span> <span class=\"n\">number<\/span><span class=\"o\">(<\/span><span class=\"n\">m<\/span><span class=\"o\">,<\/span> <span class=\"n\">o<\/span><span class=\"o\">,<\/span> <span class=\"n\">r<\/span><span class=\"o\">,<\/span> <span class=\"n\">e<\/span><span class=\"o\">)<\/span>\r\n            <span class=\"o\">==<\/span> <span class=\"n\">number<\/span><span class=\"o\">(<\/span><span class=\"n\">m<\/span><span class=\"o\">,<\/span> <span class=\"n\">o<\/span><span class=\"o\">,<\/span> <span class=\"n\">n<\/span><span class=\"o\">,<\/span> <span class=\"n\">e<\/span><span class=\"o\">,<\/span> <span class=\"n\">y<\/span><span class=\"o\">),<\/span> \r\n            <span class=\"no\">S<\/span><span class=\"o\">,<\/span> <span class=\"no\">E<\/span><span class=\"o\">,<\/span> <span class=\"no\">N<\/span><span class=\"o\">,<\/span> <span class=\"no\">D<\/span><span class=\"o\">,<\/span> <span class=\"no\">M<\/span><span class=\"o\">,<\/span> <span class=\"no\">O<\/span><span class=\"o\">,<\/span> <span class=\"no\">R<\/span><span class=\"o\">,<\/span> <span class=\"no\">Y<\/span><span class=\"o\">);<\/span>\r\n<\/code><\/pre>\n<h1>\u603b\u7ed3<\/h1>\n<p>\u6211\u4eec\u5df2\u7ecf\u53d1\u73b0\u4ee5\u4e0b\u56e0\u7d20\u4f1a\u5f71\u54cd\u6027\u80fd\u3002<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u7ea6\u675f\u6761\u4ef6\u7684\u8bbe\u7f6e\u65b9\u5f0f<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u901a\u8fc7\u5c06\u7ea6\u675f\u6761\u4ef6\u7ec6\u5316\uff0c\u53ef\u4ee5\u5728\u53d8\u91cf\u7ed1\u5b9a\u7684\u65e9\u671f\u9636\u6bb5\u8fdb\u884c\u68c0\u67e5\uff0c\u4ece\u800c\u7f29\u5c0f\u9009\u62e9\u8303\u56f4\u5e76\u63d0\u9ad8\u901f\u5ea6\u3002<\/ol>\n<\/li>\n<\/ol>\n<p>\u53d8\u91cf\u7ed1\u5b9a\u7684\u987a\u5e8f<br \/>\n\u9996\u5148\u7ed1\u5b9a\u9009\u62e9\u8f83\u5c11\u7684\u53d8\u91cf\u53ef\u4ee5\u52a0\u5feb\u901f\u5ea6\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u9996\u5148 \u5236\u7d04\u7f16\u7a0b\u662f\u4e00\u79cd\u7f16\u7a0b\u8303\u5f0f\u3002\u5728\u7ea6\u675f\u7f16\u7a0b\u4e2d\uff0c\u6211\u4eec\u901a\u8fc7\u4f7f\u7528\u7ea6\u675f\u6765\u63cf\u8ff0\u53d8\u91cf\u4e4b\u95f4\u7684\u5173\u7cfb\u6765\u7f16\u5199\u7a0b\u5e8f\u3002 \u76ee\u524d\uff0c\u5f53\u63d0\u5230\u4eba\u5de5 [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-31479","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u5728Java\u4e2d\u8fdb\u884c\u7ea6\u675f\u7f16\u7a0b - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" 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