{"id":202530,"date":"2025-05-22T08:20:33","date_gmt":"2025-05-22T00:20:33","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202530\/"},"modified":"2025-05-22T08:20:33","modified_gmt":"2025-05-22T00:20:33","slug":"java-%e5%87%bd%e6%95%b0%e5%bc%8f%e6%8e%a5%e5%8f%a3%e5%a6%82%e4%bd%95%e4%b8%8e-lambda-%e8%a1%a8%e8%be%be%e5%bc%8f%e7%bb%93%e5%90%88%e4%bd%bf%e7%94%a8%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202530\/","title":{"rendered":"Java \u51fd\u6570\u5f0f\u63a5\u53e3\u5982\u4f55\u4e0e Lambda \u8868\u8fbe\u5f0f\u7ed3\u5408\u4f7f\u7528\uff1f"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>Java \u51fd\u6570\u5f0f\u63a5\u53e3\u5982\u4f55\u4e0e Lambda \u8868\u8fbe\u5f0f\u7ed3\u5408\u4f7f\u7528\uff1f<\/h1>\n<p>\u4ece\u73b0\u5728\u5f00\u59cb\uff0c\u52aa\u529b\u5b66\u4e60\u5427\uff01\u672c\u6587<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300aJava \u51fd\u6570\u5f0f\u63a5\u53e3\u5982\u4f55\u4e0e Lambda \u8868\u8fbe\u5f0f\u7ed3\u5408\u4f7f\u7528\uff1f\u300b<\/span>\u4e3b\u8981\u8bb2\u89e3\u4e86<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span>\u7b49\u7b49\u76f8\u5173\u77e5\u8bc6\u70b9\uff0c\u6211\u4f1a\u5728\u4e2d\u6301\u7eed\u66f4\u65b0\u76f8\u5173\u7684\u7cfb\u5217\u6587\u7ae0\uff0c\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8\u5e76\u79ef\u6781\u7559\u8a00\u5efa\u8bae\u3002\u4e0b\u9762\u5c31\u5148\u4e00\u8d77\u6765\u770b\u4e00\u4e0b\u672c\u7bc7\u6b63\u6587\u5185\u5bb9\u5427\uff0c\u5e0c\u671b\u80fd\u5e2e\u5230\u4f60\uff01<\/p>\n<p>\u662f\u7684\uff0c\u51fd\u6570\u5f0f\u63a5\u53e3\u548c Lambda \u8868\u8fbe\u5f0f\u7ed3\u5408\u4f7f\u7528\u53ef\u4ee5\u7b80\u5316\u4ee3\u7801\u7f16\u5199\uff1a\u51fd\u6570\u5f0f\u63a5\u53e3\u53ea\u5305\u542b\u4e00\u4e2a\u62bd\u8c61\u65b9\u6cd5\uff0c\u901a\u8fc7 @FunctionalInterface \u6ce8\u89e3\u6807\u8bb0\u3002Lambda \u8868\u8fbe\u5f0f\u662f\u8868\u793a\u533f\u540d\u51fd\u6570\u7684\u7b80\u6d01\u8bed\u6cd5\uff0c\u65e0\u9700\u521b\u5efa\u7c7b\u5373\u53ef\u5b9e\u73b0\u51fd\u6570\u5f0f\u63a5\u53e3\u3002Lambda \u8868\u8fbe\u5f0f\u8bed\u6cd5\u4e3a (parameters) -&gt; expression\uff0c\u5176\u4e2d parameters \u662f\u51fd\u6570\u5f0f\u63a5\u53e3\u7684\u53c2\u6570\uff0cexpression \u662f\u65b9\u6cd5\u5b9e\u73b0\u3002\u7ed3\u5408\u4f7f\u7528\u65f6\uff0c\u53ef\u4ee5\u66f4\u7b80\u6d01\u3001\u4f18\u96c5\u5730\u7f16\u5199\u4ee3\u7801\uff0c\u51cf\u5c11\u6837\u677f\u4ee3\u7801\uff0c\u63d0\u9ad8\u53ef\u8bfb\u6027\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241026\/1729915359671c69df3c197.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>Java \u51fd\u6570\u5f0f\u63a5\u53e3\u548c Lambda \u8868\u8fbe\u5f0f\u7684\u7ed3\u5408<\/strong><\/p>\n<p><strong>\u51fd\u6570\u5f0f\u63a5\u53e3<\/strong><\/p>\n<p>Java \u4e2d\u7684\u51fd\u6570\u5f0f\u63a5\u53e3\u662f\u4e00\u4e2a\u53ea\u5305\u542b\u4e00\u4e2a\u62bd\u8c61\u65b9\u6cd5\u7684\u63a5\u53e3\u3002\u5b83\u5141\u8bb8\u6211\u4eec\u4e3a\u8be5\u65b9\u6cd5\u521b\u5efa\u5b9e\u73b0\uff0c\u5c31\u50cf\u5b9e\u73b0\u666e\u901a\u63a5\u53e3\u7684\u65b9\u6cd5\u4e00\u6837\u3002\u51fd\u6570\u5f0f\u63a5\u53e3\u901a\u8fc7 <code>@FunctionalInterface<\/code> \u6ce8\u89e3\u8fdb\u884c\u6807\u8bb0\u3002<\/p>\n<p><strong>Lambda \u8868\u8fbe\u5f0f<\/strong><\/p>\n<p>Lambda \u8868\u8fbe\u5f0f\u662f\u4e00\u79cd\u8868\u793a\u533f\u540d\u51fd\u6570\u7684\u7b80\u6d01\u8bed\u6cd5\u3002\u5b83\u5141\u8bb8\u6211\u4eec\u5728\u4e0d\u521b\u5efa\u663e\u5f0f\u7c7b\u7684\u60c5\u51b5\u4e0b\u4e3a\u51fd\u6570\u5f0f\u63a5\u53e3\u63d0\u4f9b\u5b9e\u73b0\u3002<\/p>\n<p><strong>\u7ed3\u5408\u51fd\u6570\u5f0f\u63a5\u53e3\u548c Lambda \u8868\u8fbe\u5f0f<\/strong><\/p>\n<p>\u51fd\u6570\u5f0f\u63a5\u53e3\u548c Lambda \u8868\u8fbe\u5f0f\u4e00\u8d77\u4f7f\u7528\u65f6\uff0c\u6211\u4eec\u53ef\u4ee5\u7528\u66f4\u7b80\u6d01\u3001\u66f4\u4f18\u96c5\u7684\u65b9\u5f0f\u7f16\u5199\u4ee3\u7801\u3002<\/p>\n<p><strong>\u8bed\u6cd5<\/strong><\/p>\n<p>\u4f7f\u7528 Lambda \u8868\u8fbe\u5f0f\u5b9e\u73b0\u51fd\u6570\u5f0f\u63a5\u53e3\u7684\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre>(parameters) -&gt; expression<\/pre>\n<p>\u5176\u4e2d <code>parameters<\/code> \u662f\u51fd\u6570\u5f0f\u63a5\u53e3\u4e2d\u62bd\u8c61\u65b9\u6cd5\u7684\u53c2\u6570\uff0c<code>expression<\/code> \u662f\u5b9e\u73b0\u8be5\u65b9\u6cd5\u7684\u4ee3\u7801\u3002<\/p>\n<p><strong>\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u51fd\u6578\u5f0f\u4ecb\u9762 <code>MyInterface<\/code>\uff0c\u5b83\u6709\u4e00\u500b\u62bd\u8c61\u65b9\u6cd5 <code>performAction(String)<\/code>\uff1a<\/p>\n<pre>@FunctionalInterface\ninterface MyInterface {\n    String performAction(String input);\n}<\/pre>\n<p>\u6211\u5011\u53ef\u4ee5\u4f7f\u7528 Lambda \u8868\u9054\u5f0f\u4f86\u5be6\u73fe <code>performAction<\/code> \u65b9\u6cd5\uff1a<\/p>\n<pre>MyInterface myInterface = (input) -&gt; \"Hello, \" + input + \"!\";<\/pre>\n<p>\u73fe\u5728\uff0c\u6211\u5011\u53ef\u4ee5\u50cf\u8abf\u7528\u666e\u901a\u65b9\u6cd5\u4e00\u6a23\u4f7f\u7528 <code>myInterface<\/code>\uff1a<\/p>\n<pre>String result = myInterface.performAction(\"Java\");\nSystem.out.println(result); \/\/ \u8f38\u51fa: Hello, Java!<\/pre>\n<p><strong>\u512a\u9ede<\/strong><\/p>\n<ul>\n<li><strong>\u7c21\u6f54\u6027\uff1a<\/strong>Lambda \u8868\u9054\u5f0f\u63d0\u4f9b\u4e86\u4e00\u7a2e\u7c21\u6f54\u7684\u65b9\u5f0f\u4f86\u5be6\u73fe\u51fd\u6578\u5f0f\u63a5\u53e3\u3002<\/li>\n<li><strong>\u66f4\u5c11\u7684\u6a23\u677f\u4ee3\u78bc\uff1a<\/strong>\u7121\u9700\u70ba\u51fd\u6578\u5f0f\u63a5\u53e3\u5275\u5efa\u986f\u5f0f\u985e\u3002<\/li>\n<li><strong>\u63d0\u9ad8\u53ef\u8b80\u6027\uff1a<\/strong>Lambda \u8868\u9054\u5f0f\u4f7f\u4ee3\u78bc\u66f4\u6613\u65bc\u95b1\u8b80\u548c\u7406\u89e3\u3002<\/li>\n<\/ul>\n<p>\u4eca\u5929\u5173\u4e8e\u300aJava \u51fd\u6570\u5f0f\u63a5\u53e3\u5982\u4f55\u4e0e Lambda \u8868\u8fbe\u5f0f\u7ed3\u5408\u4f7f\u7528\uff1f\u300b\u7684\u5185\u5bb9\u5c31\u4ecb\u7ecd\u5230\u8fd9\u91cc\u4e86\uff0c\u662f\u4e0d\u662f\u5b66\u8d77\u6765\u4e00\u76ee\u4e86\u7136\uff01\u60f3\u8981\u4e86\u89e3\u66f4\u591a\u5173\u4e8ejava\u7684\u5185\u5bb9\u8bf7\u5173\u6ce8\u516c\u4f17\u53f7\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java \u51fd\u6570\u5f0f\u63a5\u53e3\u5982\u4f55\u4e0e La&#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-202530","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202530","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=202530"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202530\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202530"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202530"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202530"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}