{"id":202933,"date":"2025-05-22T11:17:37","date_gmt":"2025-05-22T03:17:37","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202933\/"},"modified":"2025-05-22T11:17:37","modified_gmt":"2025-05-22T03:17:37","slug":"java%e4%b8%adlambda%e8%a1%a8%e8%be%be%e5%bc%8f%e7%9a%84%e8%af%ad%e6%b3%95%e8%a7%84%e5%88%99%e6%98%af%e4%bb%80%e4%b9%88%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202933\/","title":{"rendered":"Java\u4e2dlambda\u8868\u8fbe\u5f0f\u7684\u8bed\u6cd5\u89c4\u5219\u662f\u4ec0\u4e48\uff1f"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>Java\u4e2dlambda\u8868\u8fbe\u5f0f\u7684\u8bed\u6cd5\u89c4\u5219\u662f\u4ec0\u4e48\uff1f<\/h1>\n<p>\u6587\u7ae0\u5c0f\u767d\u4e00\u679a\uff0c\u6b63\u5728\u4e0d\u65ad\u5b66\u4e60\u79ef\u7d2f\u77e5\u8bc6\uff0c\u73b0\u5c06\u5b66\u4e60\u5230\u7684\u77e5\u8bc6\u8bb0\u5f55\u4e00\u4e0b\uff0c\u4e5f\u662f\u5c06\u6211\u7684\u6240\u5f97\u5206\u4eab\u7ed9\u5927\u5bb6\uff01\u800c\u4eca\u5929\u8fd9\u7bc7\u6587\u7ae0\u300aJava\u4e2dlambda\u8868\u8fbe\u5f0f\u7684\u8bed\u6cd5\u89c4\u5219\u662f\u4ec0\u4e48\uff1f\u300b\u5e26\u5927\u5bb6\u6765\u4e86\u89e3\u4e00\u4e0b##content_title##\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u4ece\u800c\u5f25\u8865\u81ea\u5df1\u7684\u4e0d\u8db3\uff0c\u52a9\u529b\u5b9e\u6218\u5f00\u53d1\uff01<\/p>\n<p><\/p>\n<p>Java\u4e2d\u7684Lambda\u8868\u8fbe\u5f0f\u8bed\u6cd5\u4e3a\uff1a(\u53c2\u6570\u5217\u8868) -&gt; \u8868\u8fbe\u5f0f\uff0c\u5176\u4e2d\u53c2\u6570\u5217\u8868\u4e3a\u9017\u53f7\u5206\u9694\u7684\u53ef\u9009\u53c2\u6570\uff0c\u8868\u8fbe\u5f0f\u4e3a\u8981\u6267\u884c\u7684\u51fd\u6570\u4f53\u3002\u5176\u4ed6\u89c4\u5219\u5305\u62ec\uff1a\u8fd4\u56de\u7c7b\u578b\u7531\u51fd\u6570\u5f0f\u63a5\u53e3\u5b9a\u4e49\uff0c\u53c2\u6570\u7c7b\u578b\u4e0e\u63a5\u53e3\u65b9\u6cd5\u53c2\u6570\u7c7b\u578b\u4e00\u81f4\uff0c\u4ee3\u7801\u5757\u51fd\u6570\u4f53\u9700\u8981\u5927\u62ec\u53f7\uff0c\u8868\u8fbe\u5f0f\u51fd\u6570\u4f53\u53ef\u4ee5\u7701\u7565return\u5173\u952e\u5b57\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241027\/1730001145671db8f9d392f.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>Java \u4e2d Lambda \u8868\u8fbe\u5f0f\u7684\u8bed\u6cd5\u89c4\u5219<\/strong><\/p>\n<p>Java \u4e2d\u7684 Lambda \u8868\u8fbe\u5f0f\u662f\u4e00\u79cd\u7b80\u5316\u7684\u533f\u540d\u51fd\u6570\uff0c\u5b83\u5141\u8bb8\u5728\u4e0d\u521b\u5efa\u5b9e\u73b0\u7c7b\u7684\u524d\u63d0\u4e0b\u5b9e\u73b0\u51fd\u6570\u5f0f\u63a5\u53e3\u3002\u5176\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre>(parameter list) -&gt; expression<\/pre>\n<p>\u5176\u4e2d\uff1a<\/p>\n<ul>\n<li><strong>parameter list<\/strong> \u662f\u4e00\u4e2a\u9017\u53f7\u5206\u9694\u7684\u53c2\u6570\u5217\u8868\uff0c\u53ef\u63a5\u53d7 0 \u4e2a\u6216\u591a\u4e2a\u53c2\u6570\u3002<\/li>\n<li><strong>expression<\/strong> \u662f\u8981\u6267\u884c\u7684\u51fd\u6570\u4f53\u3002<\/li>\n<\/ul>\n<p>\u4ee5\u4e0b\u662f Lambda \u8868\u8fbe\u5f0f\u7684\u5176\u4ed6\u8bed\u6cd5\u89c4\u5219\uff1a<\/p>\n<ul>\n<li><strong>\u8fd4\u56de\u7c7b\u578b\uff1a<\/strong> Lambda \u8868\u8fbe\u5f0f\u7684\u8fd4\u56de\u7c7b\u578b\u662f\u5b83\u5b9e\u73b0\u7684\u51fd\u6570\u5f0f\u63a5\u53e3\u7684\u8fd4\u56de\u7c7b\u578b\u3002<\/li>\n<li><strong>\u53c2\u6570\u7c7b\u578b\uff1a<\/strong> Lambda \u8868\u8fbe\u5f0f\u7684\u53c2\u6570\u7c7b\u578b\u662f\u51fd\u6570\u5f0f\u63a5\u53e3\u4e2d\u65b9\u6cd5\u7684\u53c2\u6570\u7c7b\u578b\u3002<\/li>\n<li><strong>\u5927\u62ec\u53f7\uff1a<\/strong> \u5982\u679c\u51fd\u6570\u4f53\u662f\u4e00\u4e2a\u4ee3\u7801\u5757\uff0c\u5219\u5fc5\u987b\u4f7f\u7528\u5927\u62ec\u53f7 {}\u3002<\/li>\n<li><strong>return \u5173\u952e\u5b57\uff1a<\/strong> \u5982\u679c\u51fd\u6570\u4f53\u662f\u4e00\u4e2a\u8868\u8fbe\u5f0f\uff0c\u5219\u53ef\u4ee5\u7701\u7565 return \u5173\u952e\u5b57\u3002<\/li>\n<\/ul>\n<p><strong>\u5b9e\u6218\u6848\u4f8b\uff1a<\/strong><\/p>\n<p><strong>\u8ba1\u7b97\u4e24\u4e2a\u6570\u5b57\u7684\u548c\u5e76\u8f93\u51fa\u7ed3\u679c\uff1a<\/strong><\/p>\n<pre>\/\/ \u521b\u5efa\u4e00\u4e2a\u51fd\u6570\u5f0f\u63a5\u53e3\uff0c\u5b83\u63a5\u6536\u4e24\u4e2a int \u53c2\u6570\u5e76\u8fd4\u56de\u4e00\u4e2a int\ninterface SumFunction {\n    int apply(int a, int b);\n}\n\n\/\/ \u4f7f\u7528 Lambda \u8868\u8fbe\u5f0f\u5b9e\u73b0 SumFunction\nSumFunction sum = (a, b) -&gt; {\n    return a + b;  \/\/ \u8fd4\u56de\u4e24\u4e2a\u6570\u5b57\u7684\u548c\n};\n\n\/\/ \u8c03\u7528 Lambda \u8868\u8fbe\u5f0f\u6765\u8ba1\u7b97\u4e24\u4e2a\u6570\u5b57\u7684\u548c\u5e76\u8f93\u51fa\u7ed3\u679c\nint result = sum.apply(5, 10);\nSystem.out.println(\"\u4e24\u4e2a\u6570\u5b57\u7684\u548c\u4e3a\uff1a\" + result);<\/pre>\n<p>\u8f93\u51fa\uff1a<\/p>\n<pre>\u4e24\u4e2a\u6570\u5b57\u7684\u548c\u4e3a\uff1a15<\/pre>\n<p>\u7406\u8bba\u8981\u638c\u63e1\uff0c\u5b9e\u64cd\u4e0d\u80fd\u843d\uff01\u4ee5\u4e0a\u5173\u4e8e\u300aJava\u4e2dlambda\u8868\u8fbe\u5f0f\u7684\u8bed\u6cd5\u89c4\u5219\u662f\u4ec0\u4e48\uff1f\u300b\u7684\u8be6\u7ec6\u4ecb\u7ecd\uff0c\u5927\u5bb6\u90fd\u638c\u63e1\u4e86\u5427\uff01\u5982\u679c\u60f3\u8981\u7ee7\u7eed\u63d0\u5347\u81ea\u5df1\u7684\u80fd\u529b\uff0c\u90a3\u4e48\u5c31\u6765\u5173\u6ce8\u516c\u4f17\u53f7\u5427\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java\u4e2dlambda\u8868\u8fbe\u5f0f\u7684\u8bed&#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-202933","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202933","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=202933"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202933\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202933"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202933"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202933"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}