{"id":203042,"date":"2025-05-22T12:43:09","date_gmt":"2025-05-22T04:43:09","guid":{"rendered":"https:\/\/server.hk\/cnblog\/203042\/"},"modified":"2025-05-22T12:43:09","modified_gmt":"2025-05-22T04:43:09","slug":"lambda%e8%a1%a8%e8%be%be%e5%bc%8f%e5%9c%a8java%e4%b8%ad%e7%9a%84%e5%ba%94%e7%94%a8%e5%9c%ba%e6%99%af%e6%9c%89%e5%93%aa%e4%ba%9b%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/203042\/","title":{"rendered":"lambda\u8868\u8fbe\u5f0f\u5728Java\u4e2d\u7684\u5e94\u7528\u573a\u666f\u6709\u54ea\u4e9b\uff1f"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>lambda\u8868\u8fbe\u5f0f\u5728Java\u4e2d\u7684\u5e94\u7528\u573a\u666f\u6709\u54ea\u4e9b\uff1f<\/h1>\n<p>\u5b66\u4e60<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u6587\u7ae0<\/span>\u8981\u52aa\u529b\uff0c\u4f46\u662f\u4e0d\u8981\u6025\uff01\u4eca\u5929\u7684\u8fd9\u7bc7\u6587\u7ae0<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300alambda\u8868\u8fbe\u5f0f\u5728Java\u4e2d\u7684\u5e94\u7528\u573a\u666f\u6709\u54ea\u4e9b\uff1f\u300b<\/span>\u5c06\u4f1a\u4ecb\u7ecd\u5230<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u4f60\u60f3\u6df1\u5165\u5b66\u4e60<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u6587\u7ae0<\/span>\uff0c\u53ef\u4ee5\u5173\u6ce8\u6211\uff01\u6211\u4f1a\u6301\u7eed\u66f4\u65b0\u76f8\u5173\u6587\u7ae0\u7684\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u90fd\u80fd\u6709\u6240\u5e2e\u52a9\uff01<\/p>\n<p>Lambda \u8868\u8fbe\u5f0f\u5728 Java \u4e2d\u7684\u5e94\u7528\u573a\u666f\u5305\u62ec\uff1a\u4e8b\u4ef6\u5904\u7406\u3001\u96c6\u5408\u7b5b\u9009\u548c\u6620\u5c04\u3001\u51fd\u6570\u5f0f\u63a5\u53e3\u5b9e\u73b0\u3001\u56de\u8c03\u7b80\u5316\u548c\u7ebf\u7a0b\u521b\u5efa\u3002\u5b83\u4eec\u4f7f\u7528\u7b80\u5316\u7684\u8bed\u6cd5\u5c06\u884c\u4e3a\u4f20\u9012\u7ed9\u65b9\u6cd5\uff0c\u4f7f\u4ee3\u7801\u66f4\u7b80\u6d01\u3001\u66f4\u5177\u53ef\u8bfb\u6027\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241027\/1730026057671e1a491935c.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>Lambda \u8868\u8fbe\u5f0f\u5728 Java \u4e2d\u7684\u5e94\u7528\u573a\u666f<\/strong><\/p>\n<p><strong>\u7b80\u4ecb<\/strong><\/p>\n<p>Java \u4e2d\u7684 Lambda \u8868\u8fbe\u5f0f\u662f\u4e00\u79cd\u8f7b\u91cf\u7ea7\u4e14\u7b80\u4fbf\u7684\u65b9\u6cd5\uff0c\u53ef\u8ba9\u5f00\u53d1\u8005\u5728\u65e0\u9700\u521b\u5efa\u4e00\u4e2a\u533f\u540d\u5185\u90e8\u7c7b\u7684\u60c5\u51b5\u4e0b\u5c06\u884c\u4e3a\u4f20\u9012\u7ed9\u65b9\u6cd5\u3002\u8fd9\u4f7f\u4ee3\u7801\u66f4\u7b80\u6d01\u3001\u66f4\u5177\u53ef\u8bfb\u6027\u3002<\/p>\n<p><strong>\u5e94\u7528\u573a\u666f<\/strong><\/p>\n<p>Lambda \u8868\u8fbe\u5f0f\u5728 Java \u4e2d\u6709\u5e7f\u6cdb\u7684\u5e94\u7528\uff0c\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>\u4e8b\u4ef6\u5904\u7406<\/strong>\uff1a\u5728\u4e8b\u4ef6\u9a71\u52a8\u4ee3\u7801\u4e2d\u7528\u4e8e\u5904\u7406\u8bf8\u5982\u6309\u94ae\u70b9\u51fb\u548c\u9f20\u6807\u60ac\u505c\u4e4b\u7c7b\u7684\u4e8b\u4ef6\u3002<\/li>\n<li><strong>\u7b5b\u9009\u548c\u6620\u5c04\u96c6\u5408<\/strong>\uff1a\u4f7f\u7528 <code>Stream<\/code> API \u67e5\u627e\u3001\u8f6c\u6362\u6216\u8fc7\u6ee4\u96c6\u5408\u4e2d\u7684\u5143\u7d20\u3002<\/li>\n<li><strong>\u51fd\u6570\u5f0f\u63a5\u53e3<\/strong>\uff1a\u5b9e\u73b0\u4ec5\u5305\u542b\u5355\u4e2a\u62bd\u8c61\u65b9\u6cd5\u7684\u51fd\u6570\u5f0f\u63a5\u53e3\uff08\u4f8b\u5982 <code>Runnable<\/code> \u6216 <code>Predicate<\/code>\uff09\u3002<\/li>\n<li><strong>\u7b80\u5316\u56de\u8c03<\/strong>\uff1a\u4f5c\u4e3a\u56de\u8c03\u51fd\u6570\uff0c\u5728\u5f02\u6b65\u64cd\u4f5c\uff08\u4f8b\u5982\u7f51\u7edc\u8bf7\u6c42\uff09\u5b8c\u6210\u540e\u6267\u884c\u3002<\/li>\n<li><strong>\u7ebf\u7a0b<\/strong>\uff1a\u521b\u5efa\u548c\u542f\u52a8\u7ebf\u7a0b\uff0c\u5e76\u5b9a\u4e49\u8981\u6267\u884c\u7684\u4efb\u52a1\u3002<\/li>\n<\/ul>\n<p><strong>\u8bed\u6cd5<\/strong><\/p>\n<p>Lambda \u8868\u8fbe\u5f0f\u91c7\u7528\u4ee5\u4e0b\u8bed\u6cd5\uff1a<\/p>\n<pre>(parameters) -&gt; expression<\/pre>\n<p>\u4f8b\u5982\uff0cLambda \u8868\u8fbe\u5f0f\u53ef\u4ee5\u6253\u5370 &#8220;Hello, World!&#8221;\uff1a<\/p>\n<pre>() -&gt; System.out.println(\"Hello, World!\");<\/pre>\n<p><strong>\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n<p><strong>\u4f7f\u7528 Lambda \u8868\u8fbe\u5f0f\u7b5b\u9009\u96c6\u5408<\/strong><\/p>\n<p>\u8003\u8651\u4e00\u4e2a\u5305\u542b\u6574\u578b\u7684\u5217\u8868\uff0c\u60a8\u60f3\u4ece\u4e2d\u83b7\u53d6\u5076\u6570\u3002\u4f7f\u7528 Lambda \u8868\u8fbe\u5f0f\u53ef\u4ee5\u8f7b\u677e\u5b9e\u73b0\uff1a<\/p>\n<pre>List&lt;Integer&gt; numbers = List.of(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);\n\nList&lt;Integer&gt; evenNumbers = numbers.stream()\n    .filter(n -&gt; n % 2 == 0)\n    .toList();\n\nSystem.out.println(evenNumbers);<\/pre>\n<p>\u4ea7\u751f\u7684 <code>evenNumbers<\/code> \u5217\u8868\u53ea\u5305\u542b\u5076\u6570\u7ec4\u4ef6\uff1a<code>[2, 4, 6, 8, 10]<\/code>\u3002<\/p>\n<p><strong>\u4f7f\u7528 Lambda \u8868\u8fbe\u5f0f\u5b9e\u73b0\u7ebf\u7a0b<\/strong><\/p>\n<p>\u4ee5\u4e0b Lambda \u8868\u8fbe\u5f0f\u521b\u5efa\u4e00\u4e2a\u65b0\u7ebf\u7a0b\u5e76\u6253\u5370 &#8220;Thread running!&#8221;\uff1a<\/p>\n<pre>Thread thread = new Thread(() -&gt; System.out.println(\"Thread running!\"));\nthread.start();<\/pre>\n<p>\u4eca\u5929\u5173\u4e8e\u300alambda\u8868\u8fbe\u5f0f\u5728Java\u4e2d\u7684\u5e94\u7528\u573a\u666f\u6709\u54ea\u4e9b\uff1f\u300b\u7684\u5185\u5bb9\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\uff0c\u5982\u679c\u6709\u4ec0\u4e48\u7591\u95ee\u6216\u8005\u5efa\u8bae\uff0c\u53ef\u4ee5\u5728\u516c\u4f17\u53f7\u4e0b\u591a\u591a\u56de\u590d\u4ea4\u6d41\uff1b\u6587\u4e2d\u82e5\u6709\u4e0d\u6b63\u4e4b\u5904\uff0c\u4e5f\u5e0c\u671b\u56de\u590d\u7559\u8a00\u4ee5\u544a\u77e5\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>lambda\u8868\u8fbe\u5f0f\u5728Java\u4e2d\u7684&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-203042","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203042","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=203042"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203042\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=203042"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=203042"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=203042"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}