{"id":31244,"date":"2024-01-19T22:57:14","date_gmt":"2023-07-28T03:03:35","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/java-hashcode-%e6%96%b9%e6%b3%95%e7%9a%84%e8%ae%b0%e4%ba%8b%e6%9c%ac\/"},"modified":"2025-08-12T23:02:08","modified_gmt":"2025-08-12T15:02:08","slug":"java-hashcode-%e6%96%b9%e6%b3%95%e7%9a%84%e8%ae%b0%e4%ba%8b%e6%9c%ac","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/java-hashcode-%e6%96%b9%e6%b3%95%e7%9a%84%e8%ae%b0%e4%ba%8b%e6%9c%ac\/","title":{"rendered":"[Java] hashCode \u65b9\u6cd5\u7684\u8bb0\u4e8b\u672c"},"content":{"rendered":"<h1>\u8981\u641e\u6e05\u695a\u8981\u8fbe\u5230\u7684\u76ee\u6807<\/h1>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Java\u3067 hashCode \u95a2\u9023\u306e\u30e1\u30bd\u30c3\u30c9\u306f\u3044\u304f\u3064\u304b\u306e\u30af\u30e9\u30b9\u306b\u5206\u6563\u3057\u3066\u3044\u308b\u306e\u3067\u3001\u6574\u7406\u3057\u3066\u307f\u307e\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u5404\u30e1\u30bd\u30c3\u30c9\u306e\u8a73\u7d30\u306a\u8aac\u660e\u306f\u3057\u307e\u305b\u3093\u3002<\/ul>\n<h1>\u54c8\u5e0c\u7801\u7684\u57fa\u7840<\/h1>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30cf\u30c3\u30b7\u30e5\u5024\u3092\u6c42\u3081\u308b\u3002\u30cf\u30c3\u30b7\u30e5\u30c6\u30fc\u30d6\u30eb\u63a2\u7d22\u306a\u3069\u3067\u4f7f\u308f\u308c\u308b(HashMap \u3084 HashSet \u306a\u3069)<\/ul>\n<\/li>\n<\/ul>\n<p>equals() \u3068\u30bb\u30c3\u30c8\u3067\u3001\u77db\u76fe\u306a\u304f\u5b9f\u88c5\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b<\/p>\n<p>equals() \u304c true \u3092\u8fd4\u3059\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u3001\u540c\u3058\u30cf\u30c3\u30b7\u30e5\u5024\u3067\u3042\u308b\u3053\u3068<br \/>\n\u9055\u3046\u30cf\u30c3\u30b7\u30e5\u5024\u3067\u3042\u308b\u5834\u5408\u306b\u306f\u3001equals() \u306f false \u3092\u8fd4\u3059\u3053\u3068\uff08\u5bfe\u5076\uff09<\/p>\n<p>equals() \u304c false \u3092\u8fd4\u3059\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u3001\u540c\u3058\u30cf\u30c3\u30b7\u30e5\u5024\u3067\u3042\u3063\u3066\u3082\u69cb\u308f\u306a\u3044(\u30cf\u30c3\u30b7\u30e5\u5024\u306e\u885d\u7a81)\u304c\u3001\u885d\u7a81\u304c\u5c11\u306a\u3044\u307b\u3046\u304c\u6027\u80fd\u304c\u826f\u3044<\/p>\n<h1>\u65b9\u6cd5<\/h1>\n<h2>java.lang.Object#hashCode()\u53ef\u4ee5\u7528\u4ee5\u4e0b\u65b9\u5f0f\u8fdb\u884c\u6982\u62ec\uff1a<\/h2>\n<p>\u5f53\u60f3\u8981\u5c06\u81ea\u5b9a\u4e49\u7684\u7c7b\u7528\u4f5cHashMap\u7b49\u7684\u952e\u65f6\uff0c\u9700\u8981\u81ea\u884c\u5b9e\u73b0\u8ba1\u7b97\u5b9e\u4f8b\u7684\u54c8\u5e0c\u503c\u3002<\/p>\n<h2>java.util.Objects#hash() \u7684\u4e2d\u6587\u91ca\u4e49\u3002<\/h2>\n<p>\u8ba1\u7b97\u901a\u8fc7\u53ef\u53d8\u53c2\u6570\u4f20\u9012\u7684\u5bf9\u8c61\u7684\u54c8\u5e0c\u503c\u3002\u5b9e\u9645\u4e0a\uff0c\u5b83\u76f8\u5f53\u4e8e\u8c03\u7528\u540e\u6587\u63d0\u5230\u7684 Arrays#hashCode() \u65b9\u6cd5\u3002<\/p>\n<h2>java.util.Objects\u7c7b\u7684hashCode()\u65b9\u6cd5<\/h2>\n<p>\u8ba1\u7b97\u6307\u5b9a\u5bf9\u8c61\u7684\u54c8\u5e0c\u503c\u3002\u5373\u4f7f\u4f20\u5165 null\uff0c\u4e5f\u4e0d\u4f1a\u53d1\u751f\u9519\u8bef\u3002<\/p>\n<h2>java.util.Arrays#hashCode() \u7684\u4e2d\u6587\u91ca\u4e49\u5982\u4e0b\uff1a\u5c06\u6570\u7ec4\u8f6c\u6362\u4e3a\u54c8\u5e0c\u7801\u3002<\/h2>\n<p>\u5728\u4e2d\u56fd\u7684\u4e00\u79cd\u9009\u62e9\u6027\u7684\u7248\u672c\u4e2d\uff0c\u91cd\u65b0\u8ff0\u8bf4\u5982\u4e0b\uff1a<br \/>\n\u6570\u7ec4\u5bf9\u8c61\u7684hashCode()\u65b9\u6cd5\u4f1a\u8fd4\u56de\u4e0eObject\u7c7b\u76f8\u540c\u7684\u7ed3\u679c\uff08\u5373\u5728\u8ba1\u7b97\u8fc7\u7a0b\u4e2d\u4e0d\u4f7f\u7528\u6570\u7ec4\u7684\u503c\uff09\u3002<\/p>\n<p>\u5982\u679c\u60f3\u8981\u6839\u636e\u6570\u7ec4\u7684\u5185\u5bb9\u8ba1\u7b97\u54c8\u5e0c\u503c\uff0c\u8bf7\u4f7f\u7528 Arrays#hashCode()\u3002<br \/>\n\u5373\u4f7f\u4f20\u5165 null\uff0c\u4e5f\u4e0d\u4f1a\u62a5\u9519\u3002<br \/>\n\u7136\u800c\uff0c\u591a\u7ef4\u6570\u7ec4\u7b49\u53ef\u80fd\u4e0d\u4f1a\u5f97\u5230\u9884\u671f\u7684\u8ba1\u7b97\u7ed3\u679c\u3002<br \/>\n\u5982\u679c\u9700\u8981\uff0c\u8bf7\u4f7f\u7528 Arrays#deepHashCode()\u3002<\/p>\n<p>\u53e6\u5916\uff0c\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u53ef\u4ee5\u53ea\u5bf9\u6570\u7ec4\u7684\u90e8\u5206\u8fdb\u884c\u54c8\u5e0c\u8ba1\u7b97\uff08\u4f8b\u5982\uff0c\u53ea\u4fdd\u7559\u4e86\u5bb9\u91cf\u4f46\u5c1a\u672a\u586b\u5165\u6570\u636e\u7b49\uff09\u3002\u8bf7\u81ea\u884c\u8ba1\u7b97\u3002<\/p>\n<h2>Java.util.Arrays\u7684deepHashCode()\u65b9\u6cd5<\/h2>\n<p>\u6c42\u53d6\u5d4c\u5957\u6570\u7ec4\u7684\u54c8\u5e0c\u503c\u3002<br \/>\n\u6700\u597d\u4e0d\u8981\u4f20\u9012\u81ea\u6211\u5faa\u73af\u5f15\u7528\u7684\u6570\u7ec4\uff08\u53ef\u80fd\u4f1a\u5bfc\u81f4\u65e0\u9650\u5faa\u73af\u6216\u5806\u6808\u6ea2\u51fa\uff09\u3002<br \/>\n\u4f20\u9012 null \u4e0d\u4f1a\u5bfc\u81f4\u9519\u8bef\u3002<\/p>\n<h2>java.lang.Integer#hashCode()\u7684\u539f\u751f\u4e2d\u6587\u89e3\u91ca\u3002<\/h2>\n<p>\u6709\u4e00\u4e2a\u540d\u5b57\u76f8\u540c\u7684\u5b9e\u4f8b\u65b9\u6cd5\u6765\u8ba1\u7b97Integer\u7c7b\u578b\u7684\u54c8\u5e0c\u503c\uff0c\u4ee5\u53ca\u4e00\u4e2a\u7c7b\u9759\u6001\u65b9\u6cd5\u6765\u8ba1\u7b97int\u7c7b\u578b\u7684\u54c8\u5e0c\u503c\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nc\">Integer<\/span> <span class=\"n\">i<\/span> <span class=\"o\">=<\/span> <span class=\"n\">getInteger<\/span><span class=\"o\">();<\/span>\r\n<span class=\"kt\">int<\/span> <span class=\"n\">hash1<\/span> <span class=\"o\">=<\/span> <span class=\"n\">i<\/span><span class=\"o\">.<\/span><span class=\"na\">hashCode<\/span><span class=\"o\">();<\/span>\r\n\r\n<span class=\"kt\">int<\/span> <span class=\"n\">hash2<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">Integer<\/span><span class=\"o\">.<\/span><span class=\"na\">hashCode<\/span><span class=\"o\">(<\/span><span class=\"mi\">1234<\/span><span class=\"o\">);<\/span>\r\n<\/code><\/pre>\n<p>\u53e6\u5916\uff0c\u9664\u4e86Integer\u5916\uff0c\u5176\u4ed6\u539f\u59cb\u7c7b\u578b\u7684\u5305\u88c5\u7c7b\u4e5f\u6709\u7c7b\u4f3c\u7684\u65b9\u6cd5\u3002<\/p>\n<h2>java.lang.System\u7684identityHashCode()\u51fd\u6570<\/h2>\n<p>\u4ee5\u4e0e Object \u76f8\u540c\u7684\u54c8\u5e0c\u503c\u8ba1\u7b97\u65b9\u6cd5\uff0c\u627e\u51fa\u6307\u5b9a\u5bf9\u8c61\u7684\u54c8\u5e0c\u503c\u3002\u5373\u4f7f\u5bf9\u8c61\u5177\u6709\u81ea\u5b9a\u4e49\u7684\u54c8\u5e0c\u8ba1\u7b97\u65b9\u5f0f\u4e5f\u53ef\u4ee5\u3002<\/p>\n<p>\u70ba\u4e86\u5728\u4e00\u5b9a\u7a0b\u5ea6\u4e0a\u8b58\u5225\u5be6\u4f8b\uff0c\u6709\u6642\u6703\u5728\u65e5\u8a8c\u8f38\u51fa\u6216toString()\u751f\u6210\u7684\u5b57\u4e32\u4e2d\u52a0\u5165\u984d\u5916\u8cc7\u8a0a\u3002<br \/>\n\u5373\u4f7f\u662f\u4e0d\u540c\u7684\u5be6\u4f8b\uff0c\u4e5f\u53ef\u80fd\u5177\u6709\u76f8\u540c\u7684\u54c8\u5e0c\u503c\uff0c\u56e0\u6b64\u50c5\u4f9b\u53c3\u8003\u3002<\/p>\n<h1>\u8ba1\u7b97\u65b9\u5f0f\uff08\u5b9e\u65bd\u65b9\u6cd5\uff09<\/h1>\n<h2>\u624b\u52d5\u8a08\u7b97\u96dc\u6e4a<\/h2>\n<p>\u901a\u5e38\u60c5\u51b5\u4e0b\uff0c\u6211\u4eec\u7ecf\u5e38\u4f7f\u7528\u5e94\u8be5\u7528\u4e8e\u54c8\u5e0c\u8ba1\u7b97\u7684\u5b57\u6bb5\u503c\u8fdb\u884c\u8ba1\u7b97\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nd\">@Override<\/span>\r\n<span class=\"kd\">public<\/span> <span class=\"kt\">int<\/span> <span class=\"nf\">hashCode<\/span><span class=\"o\">()<\/span>\r\n    <span class=\"kt\">int<\/span> <span class=\"n\">result<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">17<\/span><span class=\"o\">;<\/span>\r\n\r\n    <span class=\"n\">result<\/span> <span class=\"o\">*=<\/span> <span class=\"mi\">31<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"n\">result<\/span> <span class=\"o\">+=<\/span> <span class=\"n\">\u30d5\u30a3\u30fc\u30eb\u30c9\uff11\u306e\u30cf\u30c3\u30b7\u30e5\u5024<\/span><span class=\"o\">;<\/span>\r\n\r\n    <span class=\"n\">result<\/span> <span class=\"o\">*=<\/span> <span class=\"mi\">31<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"n\">result<\/span> <span class=\"o\">+=<\/span> <span class=\"n\">\u30d5\u30a3\u30fc\u30eb\u30c9\uff12\u306e\u30cf\u30c3\u30b7\u30e5\u5024<\/span><span class=\"o\">;<\/span>\r\n\r\n    <span class=\"n\">result<\/span> <span class=\"o\">*=<\/span> <span class=\"mi\">31<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"n\">result<\/span> <span class=\"o\">+=<\/span> <span class=\"n\">\u30d5\u30a3\u30fc\u30eb\u30c9\uff13\u306e\u30cf\u30c3\u30b7\u30e5\u5024<\/span><span class=\"o\">;<\/span>\r\n\r\n    <span class=\"k\">return<\/span> <span class=\"n\">result<\/span><span class=\"o\">;<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<p>\u53e6\u5916\uff0c\u5bf9\u4e8e\u5b57\u6bb5\u7684\u54c8\u5e0c\u503c\u8ba1\u7b97\u65b9\u6cd5\uff08\u4f8b\u5982\uff09\uff0c\u53ef\u4ee5\u91c7\u7528\u4ee5\u4e0b\u65b9\u5f0f\u3002<\/p>\n<p>int \u306e\u5024\u306f\u305d\u306e\u307e\u307e<\/p>\n<p>byte, char, short \u306e\u5024\u306f int \u306b\u5909\u63db\u3057\u3066<\/p>\n<p>boolean \u306f\u771f\u304c 1\u3001\u507d\u304c 0<\/p>\n<p>long \u306e\u5024\u306f\u4e0a\u4f4d 32bit \u3068\u4e0b\u4f4d 32bit \u306b\u5206\u5272\u3057\u3066\u3001\u30d3\u30c3\u30c8\u5358\u4f4d\u306e xor \u3067 int \u306b\u5909\u63db<\/p>\n<p>float \u306f Float#floatToIntBits() \u3067 int \u306b\u5909\u63db<\/p>\n<p>double \u306f Double#doubleToLongBits() \u3067 long \u306b\u5909\u63db\u3057\u3066\u3001\u3042\u3068\u306f long \u3068\u540c\u3058<br \/>\n\u305d\u306e\u4ed6\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u5834\u5408\u306b\u306f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e hashCode() \u3092\u547c\u3073\u51fa\u3057\u3066\uff08\u3042\u308b\u3044\u306f\u5b9f\u88c5\u3055\u308c\u3066\u3044\u306a\u3044\u5834\u5408\u306b\u306f\u3001\u540c\u3058\u3088\u3046\u306b\u304c\u3093\u3070\u308b\uff09<\/p>\n<p>\u8fd9\u91cc\u5bf9\u300aEffective Java\u7b2c2\u7248\u300b\u975e\u5e38\u4e86\u89e3\u3002<\/p>\n<h2>\u7236\u7c7b\u7684 hashCode() \u65b9\u6cd5<\/h2>\n<p>\u5982\u679c\u53ef\u4ee5\u83b7\u53d6\u5230\u7236\u7c7b\u5b57\u6bb5\u7684\u503c, \u90a3\u4e48\u5728\u5b50\u7c7b\u4e2d\u4e5f\u53ef\u4ee5\u8ba1\u7b97\u6240\u6709\u7684\u503c\uff0c\u4f46\u901a\u5e38\u4f1a\u8c03\u7528\u7236\u7c7b\u7684hashCode()\u65b9\u6cd5\u6765\u8003\u8651\u5176\u503c\u3002<\/p>\n<p>\u4f46\u662f\uff0c\u5982\u679c\u7236\u7c7b\u6ca1\u6709\u5b9e\u73b0hashCode()\u65b9\u6cd5\uff08\u4ecd\u7136\u662fObject\u7c7b\u7684hashCode()\uff09\uff0c\u5219\u4e0d\u5e94\u8be5\u4f7f\u7528\u7236\u7c7b\u7684hashCode()\u7ed3\u679c\u3002<\/p>\n<h2>\u5229\u7528Java7\u7684\u5b9e\u7528\u65b9\u6cd5<\/h2>\n<p>\u7531\u4e8eJava7\u65b0\u589e\u4e86\u65b9\u4fbf\u7684\u65b9\u6cd5\uff0c\u56e0\u6b64\u901a\u5e38\u60c5\u51b5\u4e0b\u53ef\u4ee5\u4f7f\u7528\u7b80\u5355\u7684\u4ee3\u7801\u6765\u8ba1\u7b97\u54c8\u5e0c\u503c\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nd\">@Override<\/span>\r\n<span class=\"kd\">public<\/span> <span class=\"kt\">int<\/span> <span class=\"nf\">hashCode<\/span><span class=\"o\">()<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"nc\">Objects<\/span><span class=\"o\">.<\/span><span class=\"na\">hash<\/span><span class=\"o\">(<\/span><span class=\"n\">\u30d5\u30a3\u30fc\u30eb\u30c9\uff11<\/span><span class=\"o\">,<\/span><span class=\"n\">\u30d5\u30a3\u30fc\u30eb\u30c9\uff12<\/span><span class=\"o\">,<\/span><span class=\"n\">\u30d5\u30a3\u30fc\u30eb\u30c9\uff13<\/span><span class=\"o\">);<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<h2>\u4f7f\u7528IDE\u8fdb\u884c\u81ea\u52a8\u5316\u751f\u6210<\/h2>\n<p>\u4f8b\u5982\uff0c\u5728Eclipse\u4e2d\uff0c\u60a8\u53ef\u4ee5\u901a\u8fc7\u9009\u62e9\u83dc\u5355\u4e2d\u7684 &#8220;Source&#8221; \u2192 &#8220;Generate hashCode() and equals() &#8230;&#8221; \u6765\u81ea\u52a8\u751f\u6210\u4ee3\u7801\u3002<\/p>\n<h2>\u5728Lombok\u4e2d\u8fdb\u884c\u54c8\u5e0c\u8ba1\u7b97\u3002<\/h2>\n<p>\u5982\u679c\u7ed9@Data\u6ce8\u89e3\u3001@Value\u6ce8\u89e3\u6216@EqualsAndHashCode\u6ce8\u89e3\uff0c\u53ef\u4ee5\u5417\uff1f<\/p>\n<h1>\u5176\u4ed6<\/h1>\n<h2>URL \u7684\u54c8\u5e0c\u7801()<\/h2>\n<p>\u597d\u50cf\u6709\u8fd9\u6837\u7684\u6545\u4e8b\u3002<\/p>\n<ul class=\"post-ul\">java.net.URL\u306e\u95c7<\/ul>\n<p>\u5728\u8ba1\u7b97URL\u7684hashCode\uff08\uff09\u65f6\uff0c\u9700\u8981\u5bf9\u4e3b\u673a\u540d\u8fdb\u884c\u5730\u5740\u89e3\u6790\uff0c\u56e0\u6b64\u6839\u636e\u73af\u5883\u548c\u65f6\u673a\u53ef\u80fd\u4f1a\u5bfc\u81f4\u54c8\u5e0c\u503c\u53d1\u751f\u53d8\u5316\u3002<br \/>\n\u4e5f\u8bb8\u5e94\u8be5\u901a\u8fc7URI\u800c\u4e0d\u662fURL\u6765\u8fdb\u884c\u5224\u65ad\u5427\u3002<\/p>\n<h2>\u5b57\u7b26\u4e32\u7684 hashCode()<\/h2>\n<p>\u8fd9\u4f3c\u4e4e\u662f\u4e00\u4e2a\u53e4\u8001\u7684\u6545\u4e8b\u3002<\/p>\n<ul class=\"post-ul\">String.hashCode() \u306e\u5909\u9077<\/ul>\n<p>\u5728Java\u7684\u67d0\u4e2a\u4e2d\u95f4\u7248\u672c\u4e2d\uff0c\u6709\u5173\u91cd\u65b0\u8bc4\u4f30\u54c8\u5e0c\u8ba1\u7b97\u65b9\u6cd5\u7684\u8ba8\u8bba\u3002<\/p>\n<h2>\u8ba1\u7b97\u6807\u51c6\u54c8\u5e0c\u503c\u7684\u65b9\u6cd5<\/h2>\n<p>\u5728\u4e2d\u56fd\u7684\u672c\u5730\u8bed\u8a00\u4e2d\u8fdb\u884c\u540c\u4e49\u8f6c\u8ff0\uff1a\u6807\u51c6(java.lang.Object)\u54c8\u5e0c\u503c\u7684\u8ba1\u7b97\u65b9\u6cd5\u4f3c\u4e4e\u53ef\u4ee5\u5728\u865a\u62df\u673a\u542f\u52a8\u65f6\u8fdb\u884c\u66f4\u6539\u3002\u53e6\u5916\uff0c\u636e\u8bf4\u5728Java7\u53ca\u4e4b\u524d\u548cJava8\u4e2d\uff0c\u9ed8\u8ba4\u503c\u6709\u6240\u4e0d\u540c\u3002<\/p>\n<ul class=\"post-ul\">Java8 \u3067 java.lang.Object#hashCode() \u306e\u751f\u6210\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u304c\u5909\u66f4\u3055\u308c\u3066\u3044\u307e\u3057\u305f\u3002<\/ul>\n<p>\u6211\u5728Windows\u4e0a\u8bd5\u7740\u8fd0\u884c\u4e86\u4ee5\u4e0b\u547d\u4ee4\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nx\">c<\/span><span class=\"p\">:<\/span><span class=\"err\">\\<\/span><span class=\"o\">&gt;<\/span> <span class=\"nx\">java<\/span> <span class=\"o\">-<\/span><span class=\"nx\">XX<\/span><span class=\"p\">:<\/span><span class=\"o\">+<\/span><span class=\"nx\">PrintFlagsFinal<\/span> <span class=\"o\">-<\/span><span class=\"nx\">version<\/span>\r\n<span class=\"p\">(<\/span><span class=\"nx\">\u4e2d\u7565<\/span><span class=\"p\">)<\/span>\r\n     <span class=\"nx\">intx<\/span> <span class=\"nx\">hashCode<\/span>                                  <span class=\"o\">=<\/span> <span class=\"mi\">5<\/span>                                   <span class=\"p\">{<\/span><span class=\"nx\">product<\/span><span class=\"p\">}<\/span>\r\n<span class=\"nx\">java<\/span> <span class=\"nx\">version<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">1.8.0_65<\/span><span class=\"dl\">\"<\/span>\r\n<span class=\"nc\">Java<\/span><span class=\"p\">(<\/span><span class=\"nx\">TM<\/span><span class=\"p\">)<\/span> <span class=\"nx\">SE<\/span> <span class=\"nx\">Runtime<\/span> <span class=\"nc\">Environment <\/span><span class=\"p\">(<\/span><span class=\"nx\">build<\/span> <span class=\"mf\">1.8<\/span><span class=\"p\">.<\/span><span class=\"mi\">0<\/span><span class=\"nx\">_65<\/span><span class=\"o\">-<\/span><span class=\"nx\">b17<\/span><span class=\"p\">)<\/span>\r\n<span class=\"nx\">Java<\/span> <span class=\"nc\">HotSpot<\/span><span class=\"p\">(<\/span><span class=\"nx\">TM<\/span><span class=\"p\">)<\/span> <span class=\"nx\">Client<\/span> <span class=\"nc\">VM <\/span><span class=\"p\">(<\/span><span class=\"nx\">build<\/span> <span class=\"mf\">25.65<\/span><span class=\"o\">-<\/span><span class=\"nx\">b01<\/span><span class=\"p\">,<\/span> <span class=\"nx\">mixed<\/span> <span class=\"nx\">mode<\/span><span class=\"p\">)<\/span>\r\n<\/code><\/pre>\n<p>\u6ca1\u9519\uff0chashCode \u7684\u503c\u786e\u5b9e\u662f 5\u3002<\/p>\n<p>\u5728JDK1.7\u4e2d\uff0c\u540c\u6837\u5730\uff0c\u68c0\u67e5hashCode \u7684\u7ed3\u679c\u4e3a0\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8981\u641e\u6e05\u695a\u8981\u8fbe\u5230\u7684\u76ee\u6807 Java\u3067 hashCode \u95a2\u9023\u306e\u30e1\u30bd\u30c3\u30c9\u306f\u3044\u304f\u3064\u304b\u306e\u30af\u30e9\u30b9\u306b\u5206\u6563\u3057\u3066\u3044\u308b\u306e\u3067\u3001\u6574\u7406\u3057 [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[227],"class_list":["post-31244","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-227"],"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>[Java] hashCode \u65b9\u6cd5\u7684\u8bb0\u4e8b\u672c - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u5173\u4e8e[Java] hashCode \u65b9\u6cd5\u7684\u8bb0\u4e8b\u672c\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/java-hashcode-\u65b9\u6cd5\u7684\u8bb0\u4e8b\u672c\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Java] hashCode \u65b9\u6cd5\u7684\u8bb0\u4e8b\u672c\" \/>\n<meta property=\"og:description\" content=\"\u5173\u4e8e[Java] hashCode \u65b9\u6cd5\u7684\u8bb0\u4e8b\u672c\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/java-hashcode-\u65b9\u6cd5\u7684\u8bb0\u4e8b\u672c\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta 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