{"id":31445,"date":"2023-02-13T12:41:23","date_gmt":"2023-04-18T06:40:57","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/java%ef%bc%9a%e5%85%b3%e4%ba%8elambda%e8%a1%a8%e8%be%be%e5%bc%8f\/"},"modified":"2024-04-29T14:26:46","modified_gmt":"2024-04-29T06:26:46","slug":"java%ef%bc%9a%e5%85%b3%e4%ba%8elambda%e8%a1%a8%e8%be%be%e5%bc%8f","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/java%ef%bc%9a%e5%85%b3%e4%ba%8elambda%e8%a1%a8%e8%be%be%e5%bc%8f\/","title":{"rendered":"Java\uff1a\u5173\u4e8eLambda\u8868\u8fbe\u5f0f"},"content":{"rendered":"<h1>\u5173\u4e8eLambda\u8868\u8fbe\u5f0f<\/h1>\n<p>Lambda\u8868\u8fbe\u5f0f\u53ef\u4ee5\u5c06\u65b9\u6cd5\u50cf\u53d8\u91cf\u4e00\u6837\u4f7f\u7528\u3002\u4e0e\u4f7f\u7528\u533f\u540d\u7c7b\u7684\u51fd\u6570\u5f0f\u63a5\u53e3\uff08\u53ea\u5305\u542b\u4e00\u4e2a\u62bd\u8c61\u65b9\u6cd5\u7684\u63a5\u53e3\uff09\u76f8\u6bd4\uff0c\u53ef\u4ee5\u7528\u66f4\u5c11\u7684\u4ee3\u7801\u6765\u7f16\u5199\u3002<\/p>\n<p>\u4e3a\u4e86\u7406\u89e3 Stream API\uff0c\u4ee5\u4e0b\u7684\u5907\u5fd8\u5f55\u603b\u7ed3\u4e86\u5fc5\u9700\u7684\u77e5\u8bc6\u3002<\/p>\n<p>\u9996\u5148\uff0c\u6211\u4eec\u6765\u6bd4\u8f83\u4f7f\u7528\u533f\u540d\u7c7b\u548c\u4f7f\u7528Lambda\u8868\u8fbe\u5f0f\u7684\u60c5\u51b5\u3002<\/p>\n<h2>\u5982\u679c\u8981\u4f7f\u7528\u533f\u540d\u7c7b<\/h2>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/ \u95a2\u6570\u578b\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u5ba3\u8a00<\/span>\r\n<span class=\"kd\">interface<\/span> <span class=\"nc\">SampleInterface<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"nc\">String<\/span> <span class=\"nf\">methodA<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span> <span class=\"n\">word<\/span><span class=\"o\">);<\/span>\r\n<span class=\"o\">}<\/span>\r\n\r\n<span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">Sample<\/span> <span class=\"o\">{<\/span>\r\n\r\n  <span class=\"kd\">public<\/span> <span class=\"kd\">static<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">main<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span><span class=\"o\">[]<\/span> <span class=\"n\">args<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"c1\">\/\/ \u533f\u540d\u30af\u30e9\u30b9<\/span>\r\n    <span class=\"nc\">SampleInterface<\/span> <span class=\"n\">si<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">SampleInterface<\/span><span class=\"o\">(){<\/span>\r\n      <span class=\"nd\">@Override<\/span>\r\n      <span class=\"kd\">public<\/span> <span class=\"nc\">String<\/span> <span class=\"nf\">methodA<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span> <span class=\"n\">word<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"s\">\"Hello\"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">word<\/span><span class=\"o\">;<\/span>\r\n      <span class=\"o\">}<\/span>\r\n    <span class=\"o\">};<\/span>\r\n\r\n    <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\">si<\/span><span class=\"o\">.<\/span><span class=\"na\">methodA<\/span><span class=\"o\">(<\/span><span class=\"s\">\"yamada\"<\/span><span class=\"o\">));<\/span> <span class=\"c1\">\/\/ -&gt; Hello yamada<\/span>\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<p>\u5982\u679c\u8981\u4f7f\u7528\u533f\u540d\u7c7b\uff0c\u8bf7\u6309\u7167\u4ee5\u4e0b\u6b65\u9aa4\u8fdb\u884c\u64cd\u4f5c\u3002<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u5982\u679c\u9700\u8981\u7684\u8bdd\uff0c\u53ef\u4ee5\u81ea\u5df1\u58f0\u660e\u51fd\u6570\u5f0f\u63a5\u53e3<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u5b9e\u4f8b\u5316\u533f\u540d\u7c7b\uff08\u91cd\u5199\u51fd\u6570\u5f0f\u63a5\u53e3\u7684\u62bd\u8c61\u65b9\u6cd5\uff09<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\u901a\u8fc7\u65b9\u6cd5\u8c03\u7528\u6765\u6267\u884c\u91cd\u5199\u7684\u64cd\u4f5c<\/ol>\n<p>\u8ba9\u6211\u4eec\u4f7f\u7528Lambda\u8868\u8fbe\u5f0f\u6765\u7b80\u5316\u4ee3\u7801\u3002<\/p>\n<h2>\u5982\u679c\u4f7f\u7528lambda\u8868\u8fbe\u5f0f<\/h2>\n<p>Lambda\u8868\u8fbe\u5f0f\u7684\u8bed\u6cd5\u5982\u4e0b\uff08\u867d\u7136\u6709\u591a\u79cd\u7701\u7565\u6a21\u5f0f\uff0c\u4f46\u8fd9\u91cc\u53ea\u8868\u793a\u57fa\u7840\u8bed\u6cd5\uff09\u3002<\/p>\n<pre class=\"post-pre\"><code>(\u5f15\u6570) -&gt; {\u51e6\u7406;};\r\n<\/code><\/pre>\n<p>\u5728&#8221;{ }&#8221;\u4e4b\u540e\uff0c\u5199\u5165&#8221;;&#8221;\u3002<br \/>\n\u8fd9\u662f\u56e0\u4e3aLambda\u8868\u8fbe\u5f0f\u5e76\u4e0d\u662f\u5728\u58f0\u660e\u51fd\u6570\uff0c\u800c\u662f\u5c06\u51fd\u6570\u8d4b\u503c\u7ed9\u53d8\u91cf\u7684&#8221;\u8868\u8fbe\u5f0f&#8221;\uff0c\u56e0\u6b64\u9700\u8981\u5728\u672b\u5c3e\u52a0\u4e0a&#8221;;&#8221;\u6765\u8868\u793a\u5fc5\u8981\u6027\u3002<br \/>\n\u611f\u8c22\u60a8\u7684\u6307\u6b63\u3002<br \/>\n\u800c&#8221;}&#8221;\u540e\u9762\u7684&#8221;;&#8221;\u5e76\u4e0d\u662fLambda\u8868\u8fbe\u5f0f\u7684\u4e00\u90e8\u5206\uff0c\u800c\u662f\u8868\u793a\u8bed\u53e5\u7684\u7ed3\u675f\u7b26\u53f7\u3002<\/p>\n<p>\u4f20\u5165\u7684\u53c2\u6570\u5c06\u4e0e\u51fd\u6570\u63a5\u53e3\u5b9a\u4e49\u7684\u62bd\u8c61\u65b9\u6cd5\u7684\u53c2\u6570\u5177\u6709\u76f8\u540c\u7684\u7c7b\u578b\uff08\u53d8\u91cf\u540d\u662f\u4efb\u610f\u7684\uff09\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/ \u95a2\u6570\u578b\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u5ba3\u8a00<\/span>\r\n<span class=\"kd\">interface<\/span> <span class=\"nc\">SampleInterface<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"nc\">String<\/span> <span class=\"nf\">methodA<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span> <span class=\"n\">word<\/span><span class=\"o\">);<\/span>\r\n<span class=\"o\">}<\/span>\r\n\r\n<span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">Sample<\/span> <span class=\"o\">{<\/span>\r\n\r\n  <span class=\"kd\">public<\/span> <span class=\"kd\">static<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">main<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span><span class=\"o\">[]<\/span> <span class=\"n\">args<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n\r\n    <span class=\"c1\">\/\/ \u30e9\u30e0\u30c0\u5f0f\uff08\u5909\u6570\u306b\u30e1\u30bd\u30c3\u30c9\u3092\u4ee3\u5165\u3057\u3066\u3044\u308b\u30a4\u30e1\u30fc\u30b8\uff09<\/span>\r\n    <span class=\"nc\">SampleInterface<\/span> <span class=\"n\">si<\/span> <span class=\"o\">=<\/span> <span class=\"o\">(<\/span><span class=\"nc\">String<\/span> <span class=\"n\">word<\/span><span class=\"o\">)<\/span> <span class=\"o\">-&gt;<\/span> <span class=\"o\">{<\/span><span class=\"k\">return<\/span> <span class=\"s\">\"Hello\"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">word<\/span><span class=\"o\">;};<\/span>\r\n    <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\">si<\/span><span class=\"o\">.<\/span><span class=\"na\">methodA<\/span><span class=\"o\">(<\/span><span class=\"s\">\"yamada\"<\/span><span class=\"o\">));<\/span> <span class=\"c1\">\/\/ -&gt; Hello yamada<\/span>\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<p>\u4f7f\u7528\u533f\u540d\u7c7b\u65f6\uff0c\u63cf\u8ff0\u53d8\u5f97\u66f4\u7b80\u5355\u4e86\u3002\u4ece\u8fd9\u91cc\u53ef\u4ee5\u8fdb\u4e00\u6b65\u7701\u7565\u3002<\/p>\n<h2>\u7701\u7565\u51fd\u6570\u7684\u53c2\u6570\u90e8\u5206<\/h2>\n<p>\u51fd\u6570\u5f0f\u63a5\u53e3\u56e0\u4e3a\u53ea\u6709\u4e00\u4e2a\u62bd\u8c61\u65b9\u6cd5\uff0c\u53ef\u4ee5\u63a8\u65ad\u51fa\u5176\u7c7b\u578b\uff0c\u56e0\u6b64\u53ef\u4ee5\u7701\u7565\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"o\">(<\/span><span class=\"n\">word<\/span><span class=\"o\">)<\/span> <span class=\"o\">-&gt;<\/span> <span class=\"o\">{<\/span><span class=\"k\">return<\/span> <span class=\"s\">\"Hello\"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">word<\/span><span class=\"o\">;};<\/span>\r\n<\/code><\/pre>\n<p>\u203b\u82e5\u7701\u7565\u4e86\u7c7b\u578b\uff0c\u5219\u5fc5\u987b\u5168\u90e8\u7701\u7565\uff0c\u5426\u5219\u4f1a\u51fa\u9519\uff08\u67d0\u4e9b\u7701\u7565\u662f\u4e0d\u5141\u8bb8\u7684\uff09\u3002<\/p>\n<p>\u5728\u53ea\u6709\u4e00\u4e2a\u53c2\u6570\u7684\u60c5\u51b5\u4e0b\uff0c\u751a\u81f3\u8fde\u62ec\u53f7\uff08\uff09\u4e5f\u53ef\u4ee5\u7701\u7565\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"n\">word<\/span> <span class=\"o\">-&gt;<\/span> <span class=\"o\">{<\/span><span class=\"k\">return<\/span> <span class=\"s\">\"Hello\"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">word<\/span><span class=\"o\">;};<\/span>\r\n<\/code><\/pre>\n<p>\u5982\u679c\u6ca1\u6709\u53c2\u6570\uff0c\u5c31\u4e0d\u80fd\u7701\u7565\u62ec\u53f7\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"o\">()<\/span> <span class=\"o\">-&gt;<\/span> <span class=\"o\">{<\/span><span class=\"n\">\u51e6\u7406<\/span><span class=\"o\">;};<\/span>\r\n<\/code><\/pre>\n<h2>\u90e8\u95e8\u7f29\u51cf\u5904\u7406<\/h2>\n<p>\u5982\u679c \u03bb \u8868\u8fbe\u5f0f\u7684\u5904\u7406\u53ea\u6709\u4e00\u884c\uff0c\u5219\u53ef\u4ee5\u7701\u7565 return \u548c {}\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"o\">(<\/span><span class=\"n\">word<\/span><span class=\"o\">)<\/span> <span class=\"o\">-&gt;<\/span> <span class=\"o\">{<\/span><span class=\"k\">return<\/span> <span class=\"s\">\"Hello\"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">word<\/span><span class=\"o\">;};<\/span>\r\n<\/code><\/pre>\n<p>\u8fd9\u6bb5\u4ee3\u7801<\/p>\n<pre class=\"post-pre\"><code><span class=\"o\">(<\/span><span class=\"n\">word<\/span><span class=\"o\">)<\/span> <span class=\"o\">-&gt;<\/span> <span class=\"s\">\"Hello\"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">word<\/span><span class=\"o\">;<\/span>\r\n<\/code><\/pre>\n<p>\u53ef\u4ee5\u8fd9\u6837\u7b80\u7565\u8868\u8fbe\u3002<\/p>\n<h2>\u5bf9\u7701\u7565\u6a21\u5f0f\u8fdb\u884c\u603b\u7ed3<\/h2>\n<p>\u5f15\u6570\u90e8\u5206\u7684\u7701\u7565<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u578b\u3092\u7701\u7565\u3067\u304d\u308b\uff08\u95a2\u6570\u578b\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u306f\u30e1\u30bd\u30c3\u30c9\u304c\uff11\u3064\u306a\u306e\u3067\u63a8\u8ad6\u3067\u304d\u308b\u305f\u3081\uff09<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u5f15\u6570\u304c\u4e00\u3064\u306e\u5834\u5408\u3001\uff08 \uff09\u3082\u7701\u7565\u53ef\u80fd<\/ul>\n<p>\u5173\u4e8e\u5904\u7406\u90e8\u95e8\u7684\u7701\u7565<\/p>\n<ul class=\"post-ul\">\u51e6\u7406\u304c 1 \u884c\u306e\u5834\u5408\u3001retun \u3068\uff5b \uff5d\u3092\u7701\u7565\u3067\u304d\u308b<\/ul>\n<p>\u4e0b\u6b21\u6211\u60f3\u603b\u7ed3\u4e00\u4e0b\u5173\u4e8eStream API\u7684\u5185\u5bb9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5173\u4e8eLambda\u8868\u8fbe\u5f0f Lambda\u8868\u8fbe\u5f0f\u53ef\u4ee5\u5c06\u65b9\u6cd5\u50cf\u53d8\u91cf\u4e00\u6837\u4f7f\u7528\u3002\u4e0e\u4f7f\u7528\u533f\u540d\u7c7b\u7684\u51fd\u6570\u5f0f\u63a5\u53e3\uff08\u53ea\u5305\u542b\u4e00\u4e2a\u62bd\u8c61\u65b9 [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-31445","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>Java\uff1a\u5173\u4e8eLambda\u8868\u8fbe\u5f0f - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, 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