{"id":202687,"date":"2025-05-22T11:17:36","date_gmt":"2025-05-22T03:17:36","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202687\/"},"modified":"2025-05-22T11:17:36","modified_gmt":"2025-05-22T03:17:36","slug":"java%e5%87%bd%e6%95%b0%e5%bc%8f%e7%bc%96%e7%a8%8b%ef%bc%9a%e4%bc%98%e7%bc%ba%e7%82%b9%e6%b7%b1%e5%85%a5%e5%88%86%e6%9e%90","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202687\/","title":{"rendered":"Java\u51fd\u6570\u5f0f\u7f16\u7a0b\uff1a\u4f18\u7f3a\u70b9\u6df1\u5165\u5206\u6790"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>Java\u51fd\u6570\u5f0f\u7f16\u7a0b\uff1a\u4f18\u7f3a\u70b9\u6df1\u5165\u5206\u6790<\/h1>\n<p>\u5077\u5077\u52aa\u529b\uff0c\u6084\u65e0\u58f0\u606f\u5730\u53d8\u5f3a\uff0c\u7136\u540e\u60ca\u8273\u6240\u6709\u4eba\uff01\u54c8\u54c8\uff0c\u5c0f\u4f19\u4f34\u4eec\u53c8\u6765\u5b66\u4e60\u5566~\u4eca\u5929\u6211\u5c06\u7ed9\u5927\u5bb6\u4ecb\u7ecd<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300aJava\u51fd\u6570\u5f0f\u7f16\u7a0b\uff1a\u4f18\u7f3a\u70b9\u6df1\u5165\u5206\u6790\u300b<\/span>\uff0c\u8fd9\u7bc7\u6587\u7ae0\u4e3b\u8981\u4f1a\u8bb2\u5230<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u4e0d\u77e5\u9053\u5927\u5bb6\u5bf9\u5176\u90fd\u6709\u591a\u5c11\u4e86\u89e3\uff0c\u4e0b\u9762\u6211\u4eec\u5c31\u4e00\u8d77\u6765\u770b\u4e00\u5427\uff01\u5f53\u7136\uff0c\u975e\u5e38\u5e0c\u671b\u5927\u5bb6\u80fd\u591a\u591a\u8bc4\u8bba\uff0c\u7ed9\u51fa\u5408\u7406\u7684\u5efa\u8bae\uff0c\u6211\u4eec\u4e00\u8d77\u5b66\u4e60\uff0c\u4e00\u8d77\u8fdb\u6b65\uff01<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241026\/1729932150671cab764c525.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>Java \u51fd\u6570\u5f0f\u7f16\u7a0b\uff1a\u4f18\u7f3a\u70b9\u6df1\u5165\u5206\u6790<\/strong><\/p>\n<p><strong>\u524d\u8a00<\/strong><\/p>\n<p>\u51fd\u6570\u5f0f\u7f16\u7a0b\u662f\u4e00\u79cd\u7f16\u7a0b\u8303\u5f0f\uff0c\u5f3a\u8c03\u4e0d\u53ef\u53d8\u6027\u3001\u7eaf\u51fd\u6570\u548c\u51fd\u6570\u4f5c\u4e3a\u4e00\u7b49\u516c\u6c11\u3002\u5728 Java \u4e2d\uff0c\u51fd\u6570\u5f0f\u7f16\u7a0b\u901a\u8fc7 <code>lambda<\/code> \u8868\u8fbe\u5f0f\u548c <code>Stream<\/code> API \u5b9e\u73b0\u3002<\/p>\n<p><strong>\u4f18\u70b9<\/strong><\/p>\n<ul>\n<li><strong>\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u9ad8\uff1a<\/strong>\u51fd\u6570\u5f0f\u4ee3\u7801\u5f80\u5f80\u66f4\u7b80\u6d01\u76f4\u89c2\uff0c\u6613\u4e8e\u7406\u89e3\u548c\u7ef4\u62a4\u3002<\/li>\n<li><strong>\u5e76\u53d1\u6027\uff1a<\/strong>\u51fd\u6570\u5f0f\u7f16\u7a0b\u5929\u7136\u652f\u6301\u5e76\u53d1\u6027\uff0c\u56e0\u4e3a\u5b83\u5f3a\u8c03\u4e0d\u53ef\u53d8\u6027\u548c\u7ebf\u7a0b\u5b89\u5168\u3002<\/li>\n<li><strong>\u53ef\u6d4b\u8bd5\u6027\uff1a<\/strong>\u7eaf\u51fd\u6570\u6613\u4e8e\u6d4b\u8bd5\uff0c\u56e0\u4e3a\u5b83\u4eec\u6ca1\u6709\u526f\u4f5c\u7528\uff0c\u8f93\u5165\u76f8\u540c\u603b\u662f\u4f1a\u4ea7\u751f\u76f8\u540c\u7684\u8f93\u51fa\u3002<\/li>\n<li><strong>\u6027\u80fd\uff1a<\/strong>Stream API \u901a\u8fc7\u5229\u7528\u5e76\u884c\u6027\uff0c\u53ef\u4ee5\u9ad8\u6548\u5730\u5904\u7406\u5927\u6570\u636e\u96c6\u3002<\/li>\n<\/ul>\n<p><strong>\u7f3a\u70b9<\/strong><\/p>\n<ul>\n<li><strong>\u5b66\u4e60\u66f2\u7ebf\u9661\u5ced\uff1a<\/strong>\u76f8\u5bf9\u4e8e\u9762\u5411\u5bf9\u8c61\u7684\u7f16\u7a0b\uff0c\u51fd\u6570\u5f0f\u7f16\u7a0b\u5bf9\u521d\u5b66\u8005\u6765\u8bf4\u53ef\u80fd\u9700\u8981\u66f4\u9ad8\u7684\u5b66\u4e60\u66f2\u7ebf\u3002<\/li>\n<li><strong>\u6570\u636e\u4e0d\u53ef\u53d8\u6027\uff1a<\/strong>\u51fd\u6570\u5f0f\u7f16\u7a0b\u8981\u6c42\u6570\u636e\u4e0d\u53ef\u53d8\uff0c\u8fd9\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\u53ef\u80fd\u4e0d\u9002\u7528\u6216\u4e0d\u65b9\u4fbf\u3002<\/li>\n<li><strong>\u6027\u80fd\u5f00\u9500\uff1a<\/strong>\u521b\u5efa\u548c\u64cd\u4f5c <code>lambda<\/code> \u8868\u8fbe\u5f0f\u548c <code>Stream<\/code> \u53ef\u80fd\u4f1a\u5e26\u6765\u4e00\u4e9b\u6027\u80fd\u5f00\u9500\u3002<\/li>\n<\/ul>\n<p><strong>\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u8ba1\u7b97\u5217\u8868\u4e2d\u5076\u6570\u548c\u7684 Java \u51fd\u6570\u5f0f\u7f16\u7a0b\u793a\u4f8b\uff1a<\/p>\n<pre>import java.util.Arrays;\nimport java.util.List;\nimport java.util.stream.Collectors;\n\npublic class SumEvenNumbers {\n\n    public static void main(String[] args) {\n        List&lt;Integer&gt; numbers = Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);\n\n        \/\/ 1. \u8fc7\u6ee4\u5076\u6570\n        List&lt;Integer&gt; evenNumbers = numbers.stream()\n                .filter(n -&gt; n % 2 == 0)\n                .collect(Collectors.toList());\n\n        \/\/ 2. \u6c42\u548c\n        int sum = evenNumbers.stream()\n                .mapToInt(Integer::intValue)\n                .sum();\n\n        System.out.println(\"\u5076\u6570\u4e4b\u548c\uff1a\" + sum);\n    }\n}<\/pre>\n<p><strong>\u7ed3\u8bba<\/strong><\/p>\n<p>\u51fd\u6570\u5f0f\u7f16\u7a0b\u5728 Java \u4e2d\u6709\u7740\u5e7f\u6cdb\u7684\u4f18\u70b9\uff0c\u5305\u62ec\u53ef\u8bfb\u6027\u3001\u53ef\u7ef4\u62a4\u6027\u3001\u5e76\u53d1\u6027\u3001\u53ef\u6d4b\u8bd5\u6027\u548c\u6027\u80fd\u3002\u7136\u800c\uff0c\u5b83\u4e5f\u6709\u4e00\u5b9a\u7684\u7f3a\u70b9\uff0c\u4f8b\u5982\u5b66\u4e60\u66f2\u7ebf\u9661\u5ced\u3001\u6570\u636e\u4e0d\u53ef\u53d8\u6027\u548c\u6f5c\u5728\u7684\u6027\u80fd\u5f00\u9500\u3002\u5728\u9009\u62e9\u662f\u5426\u4f7f\u7528\u51fd\u6570\u5f0f\u7f16\u7a0b\u65f6\uff0c\u4ed4\u7ec6\u6743\u8861\u8fd9\u4e9b\u56e0\u7d20\u975e\u5e38\u91cd\u8981\u3002<\/p>\n<p>\u4eca\u5929\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u5e0c\u671b\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff1b\u5173\u4e8e\u6587\u7ae0\u7684\u6280\u672f\u77e5\u8bc6\u6211\u4eec\u4f1a\u4e00\u70b9\u70b9\u6df1\u5165\u4ecb\u7ecd\uff0c\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8\u516c\u4f17\u53f7\uff0c\u4e00\u8d77\u5b66\u4e60\u7f16\u7a0b~<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java\u51fd\u6570\u5f0f\u7f16\u7a0b\uff1a\u4f18\u7f3a\u70b9\u6df1\u5165\u5206&#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-202687","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202687","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=202687"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202687\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202687"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202687"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202687"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}