{"id":203079,"date":"2025-05-22T10:30:31","date_gmt":"2025-05-22T02:30:31","guid":{"rendered":"https:\/\/server.hk\/cnblog\/203079\/"},"modified":"2025-05-22T10:30:31","modified_gmt":"2025-05-22T02:30:31","slug":"java%e5%87%bd%e6%95%b0%e5%bc%8f%e6%8e%a5%e5%8f%a3%e7%9a%84lambda%e8%a1%a8%e8%be%be%e5%bc%8f%e5%ae%9e%e7%8e%b0","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/203079\/","title":{"rendered":"Java\u51fd\u6570\u5f0f\u63a5\u53e3\u7684lambda\u8868\u8fbe\u5f0f\u5b9e\u73b0"},"content":{"rendered":"

<\/b> <\/p>\n

Java\u51fd\u6570\u5f0f\u63a5\u53e3\u7684lambda\u8868\u8fbe\u5f0f\u5b9e\u73b0<\/h1>\n

\u6709\u5fd7\u8005\uff0c\u4e8b\u7adf\u6210\uff01\u5982\u679c\u4f60\u5728\u5b66\u4e60\u6587\u7ae0<\/span>\uff0c\u90a3\u4e48\u672c\u6587\u300aJava\u51fd\u6570\u5f0f\u63a5\u53e3\u7684lambda\u8868\u8fbe\u5f0f\u5b9e\u73b0\u300b<\/span>\uff0c\u5c31\u5f88\u9002\u5408\u4f60\uff01\u6587\u7ae0\u8bb2\u89e3\u7684\u77e5\u8bc6\u70b9\u4e3b\u8981\u5305\u62ec<\/span>\uff0c\u82e5\u662f\u4f60\u5bf9\u672c\u6587\u611f\u5174\u8da3\uff0c\u6216\u8005\u662f\u60f3\u641e\u61c2\u5176\u4e2d\u67d0\u4e2a\u77e5\u8bc6\u70b9\uff0c\u5c31\u8bf7\u4f60\u7ee7\u7eed\u5f80\u4e0b\u770b\u5427~<\/span><\/p>\n

Java \u51fd\u6570\u5f0f\u63a5\u53e3\u7684 lambda \u8868\u8fbe\u5f0f\u5b9e\u73b0\u63d0\u4f9b\u4e86\u4f7f\u7528 lambda \u8868\u8fbe\u5f0f\u6765\u5b9e\u73b0\u51fd\u6570\u5f0f\u63a5\u53e3\u7684\u65b9\u6cd5\uff0c\u5177\u6709\u7b80\u6d01\u6027\u3001\u53ef\u8bfb\u6027\u548c\u53ef\u91cd\u7528\u6027\u7b49\u4f18\u70b9\u3002\u5b83\u901a\u8fc7\u4f7f\u7528\u5305\u542b\u5f62\u53c2\u5217\u8868\u548c\u4ee3\u7801\u5757\u7684 lambda \u8868\u8fbe\u5f0f\u6765\u5b9e\u73b0\u5b9e\u73b0\u51fd\u6570\u5f0f\u63a5\u53e3\uff0c\u901a\u8fc7\u793a\u4f8b\u6f14\u793a\u4e86 Comparator \u63a5\u53e3\u7684\u5b9e\u73b0\uff0c\u5e76\u5f3a\u8c03\u4e86 lambda \u8868\u8fbe\u5f0f\u7684\u4f18\u70b9\u3002<\/p>\n

<\/p>\n

Java \u51fd\u6570\u5f0f\u63a5\u53e3\u7684 lambda \u8868\u8fbe\u5f0f\u5b9e\u73b0<\/strong><\/p>\n

\u524d\u8a00<\/strong><\/p>\n

\u51fd\u6570\u5f0f\u63a5\u53e3\u662f\u4e00\u4e2a\u4ec5\u5305\u542b\u4e00\u4e2a\u62bd\u8c61\u65b9\u6cd5\u7684\u63a5\u53e3\u3002Lambda \u8868\u8fbe\u5f0f\u662f\u4e00\u79cd\u533f\u540d\u51fd\u6570\uff0c\u5b83\u53ef\u4ee5\u7528\u6765\u5b9e\u73b0\u51fd\u6570\u5f0f\u63a5\u53e3\u3002<\/p>\n

\u8bed\u6cd5<\/strong><\/p>\n

(parameter list) -> {body}<\/pre>\n
\u5176\u4e2d\uff1a<\/p>\n
    \n
  • parameter list<\/strong> \u662f\u4e00\u4e2a\u9017\u53f7\u5206\u9694\u7684\u5f62\u53c2\u5217\u8868\u3002<\/li>\n
  • body<\/strong> \u662f\u4e00\u4e2a\u4ee3\u7801\u5757\uff0c\u5b83\u8868\u793a lambda \u8868\u8fbe\u5f0f\u8981\u6267\u884c\u7684\u64cd\u4f5c\u3002<\/li>\n<\/ul>\n
    \u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n
    \u4e0b\u9762\u662f\u4e00\u4e2a\u4f7f\u7528 lambda \u8868\u8fbe\u5f0f\u5b9e\u73b0 Comparator<\/code> \u51fd\u6570\u5f0f\u63a5\u53e3\u7684\u793a\u4f8b\uff1a<\/p>\n
    List<String> names = Arrays.asList(\"John\", \"Alice\", \"Bob\");\n\n\/\/ \u4f7f\u7528 lambda \u8868\u8fbe\u5f0f\u5b9e\u73b0 Comparator\nComparator<String> comparator = (a, b) -> a.compareTo(b);\n\n\/\/ \u4f7f\u7528 Comparator \u6392\u5e8f\u5217\u8868\nCollections.sort(names, comparator);\n\n\/\/ \u6253\u5370\u6392\u5e8f\u540e\u7684\u5217\u8868\nfor (String name : names) {\n    System.out.println(name);\n}<\/pre>\n
    \u8f93\u51fa\uff1a<\/strong><\/p>\n
    Alice\nBob\nJohn<\/pre>\n
    \u4f18\u70b9<\/strong><\/p>\n
    \u4f7f\u7528 lambda \u8868\u8fbe\u5f0f\u6765\u5b9e\u73b0\u51fd\u6570\u5f0f\u63a5\u53e3\u5177\u6709\u4ee5\u4e0b\u4f18\u70b9\uff1a<\/p>\n
      \n
    • \u7b80\u6d01\u6027\uff1a<\/strong>lambda \u8868\u8fbe\u5f0f\u53ef\u4ee5\u7b80\u5316\u4ee3\u7801\uff0c\u4f7f\u5176\u66f4\u6613\u4e8e\u7f16\u5199\u548c\u7ef4\u62a4\u3002<\/li>\n
    • \u53ef\u8bfb\u6027\uff1a<\/strong>lambda \u8868\u8fbe\u5f0f\u660e\u786e\u8868\u793a\u4e86\u4ee3\u7801\u7684\u76ee\u7684\uff0c\u63d0\u9ad8\u4e86\u53ef\u8bfb\u6027\u3002<\/li>\n
    • \u53ef\u91cd\u7528\u6027\uff1a<\/strong>lambda \u8868\u8fbe\u5f0f\u53ef\u4ee5\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u7ed9\u5176\u4ed6\u65b9\u6cd5\u6216\u51fd\u6570\uff0c\u63d0\u9ad8\u4e86\u4ee3\u7801\u7684\u53ef\u91cd\u7528\u6027\u3002<\/li>\n<\/ul>\n
      \u7ed3\u8bba<\/strong><\/p>\n
      lambda \u8868\u8fbe\u5f0f\u4e3a Java \u63d0\u4f9b\u4e86\u4e00\u79cd\u7b80\u6d01\u4e14\u5f3a\u5927\u7684\u65b9\u5f0f\u6765\u5b9e\u73b0\u51fd\u6570\u5f0f\u63a5\u53e3\u3002\u5b83\u4eec\u53ef\u4ee5\u663e\u7740\u63d0\u9ad8\u4ee3\u7801\u7684\u7b80\u6d01\u6027\u3001\u53ef\u8bfb\u6027\u548c\u53ef\u91cd\u7528\u6027\u3002<\/p>\n
      \u4eca\u5929\u5173\u4e8e\u300aJava\u51fd\u6570\u5f0f\u63a5\u53e3\u7684lambda\u8868\u8fbe\u5f0f\u5b9e\u73b0\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":"
      Java\u51fd\u6570\u5f0f\u63a5\u53e3\u7684lambda...<\/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-203079","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203079","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=203079"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203079\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=203079"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=203079"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=203079"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}