{"id":202708,"date":"2025-05-22T11:18:05","date_gmt":"2025-05-22T03:18:05","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202708\/"},"modified":"2025-05-22T11:18:05","modified_gmt":"2025-05-22T03:18:05","slug":"java-%e5%87%bd%e6%95%b0%e5%bc%8f%e6%8e%a5%e5%8f%a3%e6%98%af%e4%bb%80%e4%b9%88%ef%bc%8c%e4%bb%a5%e5%8f%8a%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8%e5%ae%83%e4%bb%ac%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202708\/","title":{"rendered":"Java \u51fd\u6570\u5f0f\u63a5\u53e3\u662f\u4ec0\u4e48\uff0c\u4ee5\u53ca\u5982\u4f55\u4f7f\u7528\u5b83\u4eec\uff1f"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>Java \u51fd\u6570\u5f0f\u63a5\u53e3\u662f\u4ec0\u4e48\uff0c\u4ee5\u53ca\u5982\u4f55\u4f7f\u7528\u5b83\u4eec\uff1f<\/h1>\n<p>\u76ee\u524d\u4e0a\u5df2\u7ecf\u6709\u5f88\u591a\u5173\u4e8e<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u6587\u7ae0<\/span>\u7684\u6587\u7ae0\u4e86\uff0c\u81ea\u5df1\u5728\u521d\u6b21\u9605\u8bfb\u8fd9\u4e9b\u6587\u7ae0\u4e2d\uff0c\u4e5f\u89c1\u8bc6\u5230\u4e86\u5f88\u591a\u5b66\u4e60\u601d\u8def\uff1b\u90a3\u4e48\u672c\u6587<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300aJava \u51fd\u6570\u5f0f\u63a5\u53e3\u662f\u4ec0\u4e48\uff0c\u4ee5\u53ca\u5982\u4f55\u4f7f\u7528\u5b83\u4eec\uff1f\u300b<\/span>\uff0c\u4e5f\u5e0c\u671b\u80fd\u5e2e\u52a9\u5230\u5927\u5bb6\uff0c\u5982\u679c\u9605\u8bfb\u5b8c\u540e\u771f\u7684\u5bf9\u4f60\u5b66\u4e60<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u6587\u7ae0<\/span>\u6709\u5e2e\u52a9\uff0c\u6b22\u8fce\u52a8\u52a8\u624b\u6307\uff0c\u8bc4\u8bba\u7559\u8a00\u5e76\u5206\u4eab~<\/p>\n<p>\u51fd\u6570\u5f0f\u63a5\u53e3\u662f Java 8 \u4e2d\u53ea\u5305\u542b\u4e00\u4e2a\u62bd\u8c61\u65b9\u6cd5\u7684\u63a5\u53e3\uff0c\u5141\u8bb8\u4f7f\u7528 lambda \u8868\u8fbe\u5f0f\u4f5c\u4e3a\u53c2\u6570\uff0c\u8bed\u6cd5\u4e3a @FunctionalInterface public interface FunctionInterfaceName { returnType methodName(parameterType parameterName); }\u3002\u4e3b\u8981\u4f18\u52bf\u5305\u62ec\uff1a\u7b80\u6d01\u6027\u3001\u53ef\u7ec4\u5408\u6027\u3001\u5e76\u884c\u6027\u3002\u4f7f\u7528\u65f6\u8981\u6ce8\u610f\u53ea\u5305\u542b\u4e00\u4e2a\u62bd\u8c61\u65b9\u6cd5\uff0c\u907f\u514d\u53d8\u91cf\u6355\u83b7\uff0c\u6b63\u786e\u4f7f\u7528\u6ce8\u89e3 @FunctionalInterface\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241026\/1729935402671cb82a4479b.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>Java \u51fd\u6570\u5f0f\u63a5\u53e3\uff1a\u6df1\u5165\u63a2\u8ba8<\/strong><\/p>\n<p>\u51fd\u6570\u5f0f\u63a5\u53e3\u662f\u4e00\u4e2a Java \u63a5\u53e3\uff0c\u53ea\u6709\u4e00\u4e2a\u62bd\u8c61\u65b9\u6cd5\u3002\u5b83\u5141\u8bb8\u5c06 Java 8 \u4e2d\u7684 lambda \u8868\u8fbe\u5f0f\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\uff0c\u4ece\u800c\u5b9e\u73b0\u66f4\u7b80\u6d01\u3001\u66f4\u5177\u8868\u73b0\u529b\u7684\u4ee3\u7801\u3002<\/p>\n<p><strong>\u8bed\u6cd5<\/strong><\/p>\n<p>\u51fd\u6570\u5f0f\u63a5\u53e3\u7684\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre>@FunctionalInterface\npublic interface FunctionInterfaceName {\n\n    \/\/ \u53ea\u6709\u4e00\u4e2a\u62bd\u8c61\u65b9\u6cd5\n    returnType methodName(parameterType parameterName);\n}<\/pre>\n<p><strong>\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n<p>\u8ba9\u6211\u4eec\u521b\u5efa\u4e00\u4e2a\u51fd\u6570\u5f0f\u63a5\u53e3 <code>MyInterface<\/code> \u6765\u8ba1\u7b97\u4e24\u4e2a\u6570\u5b57\u7684\u548c\uff1a<\/p>\n<pre>@FunctionalInterface\npublic interface MyInterface {\n    int add(int a, int b);\n}<\/pre>\n<p>\u7136\u540e\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 lambda \u8868\u8fbe\u5f0f\u6765\u5b9e\u73b0 <code>MyInterface<\/code>\uff1a<\/p>\n<pre>MyInterface myInterface = (a, b) -&gt; a + b;<\/pre>\n<p>\u73b0\u5728\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 <code>myInterface<\/code> \u51fd\u6570\u5f0f\u5bf9\u8c61\u6765\u6267\u884c\u64cd\u4f5c\uff1a<\/p>\n<pre>int result = myInterface.add(10, 20);\nSystem.out.println(\"Sum: \" + result); \/\/ \u8f93\u51fa\uff1a30<\/pre>\n<p><strong>\u4f18\u52bf<\/strong><\/p>\n<p>\u4f7f\u7528\u51fd\u6570\u5f0f\u63a5\u53e3\u6709\u4ee5\u4e0b\u4f18\u52bf\uff1a<\/p>\n<ul>\n<li><strong>\u7b80\u6d01\u6027\uff1a<\/strong>lambda \u8868\u8fbe\u5f0f\u53ef\u4ee5\u4f7f\u4ee3\u7801\u66f4\u7b80\u6d01\uff0c\u66f4\u5177\u8868\u8fbe\u529b\u3002<\/li>\n<li><strong>\u53ef\u7ec4\u5408\u6027\uff1a<\/strong>\u51fd\u6570\u5f0f\u63a5\u53e3\u53ef\u4ee5\u8f7b\u677e\u5730\u7ec4\u5408\u5728\u4e00\u8d77\u521b\u5efa\u66f4\u590d\u6742\u7684\u8ba1\u7b97\u3002<\/li>\n<li><strong>\u5e76\u884c\u6027\uff1a<\/strong>\u51fd\u6570\u5f0f\u63a5\u53e3\u4e0e Java \u7684\u5e76\u884c\u6d41\u6846\u67b6\u96c6\u6210\u826f\u597d\uff0c\u5141\u8bb8\u5e76\u884c\u6267\u884c\u64cd\u4f5c\u3002<\/li>\n<\/ul>\n<p><strong>\u6ce8\u610f\u4e8b\u9879<\/strong><\/p>\n<ul>\n<li>\u786e\u4fdd\u51fd\u6570\u5f0f\u63a5\u53e3\u53ea\u5305\u542b\u4e00\u4e2a\u62bd\u8c61\u65b9\u6cd5\u3002\u8fdd\u53cd\u6b64\u7ea6\u5b9a\u4f1a\u5bfc\u81f4\u7f16\u8bd1\u65f6\u9519\u8bef\u3002<\/li>\n<li>\u907f\u514d\u4f7f\u7528\u53d8\u91cf\u6355\u83b7\uff0c\u56e0\u4e3a\u5b83\u53ef\u80fd\u5bfc\u81f4\u610f\u5916\u884c\u4e3a\u548c\u5185\u5b58\u6cc4\u6f0f\u3002<\/li>\n<li>\u6b63\u786e\u4f7f\u7528\u6ce8\u89e3 <code>@FunctionalInterface<\/code> \u4ee5\u4fbf\u7f16\u8bd1\u5668\u53ef\u4ee5\u9a8c\u8bc1\u63a5\u53e3\u4ec5\u6709\u4e00\u4e2a\u62bd\u8c61\u65b9\u6cd5\u3002<\/li>\n<\/ul>\n<p>\u4ee5\u4e0a\u5c31\u662f\u672c\u6587\u7684\u5168\u90e8\u5185\u5bb9\u4e86\uff0c\u662f\u5426\u6709\u987a\u5229\u5e2e\u52a9\u4f60\u89e3\u51b3\u95ee\u9898\uff1f\u82e5\u662f\u80fd\u7ed9\u4f60\u5e26\u6765\u5b66\u4e60\u4e0a\u7684\u5e2e\u52a9\uff0c\u8bf7\u5927\u5bb6\u591a\u591a\u652f\u6301\uff01\u66f4\u591a\u5173\u4e8e\u6587\u7ae0\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u4e5f\u53ef\u5173\u6ce8\u516c\u4f17\u53f7\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java \u51fd\u6570\u5f0f\u63a5\u53e3\u662f\u4ec0\u4e48\uff0c\u4ee5\u53ca&#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-202708","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202708","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=202708"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202708\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202708"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202708"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202708"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}