{"id":202985,"date":"2025-05-22T11:11:39","date_gmt":"2025-05-22T03:11:39","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202985\/"},"modified":"2025-05-22T11:11:39","modified_gmt":"2025-05-22T03:11:39","slug":"%e5%a6%82%e4%bd%95%e7%94%a8-lambdas-%e5%88%9b%e5%bb%ba%e5%8f%af%e9%87%8d%e7%94%a8-java-%e5%87%bd%e6%95%b0%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202985\/","title":{"rendered":"\u5982\u4f55\u7528 lambdas \u521b\u5efa\u53ef\u91cd\u7528 Java \u51fd\u6570\uff1f"},"content":{"rendered":"

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

\u5982\u4f55\u7528 lambdas \u521b\u5efa\u53ef\u91cd\u7528 Java \u51fd\u6570\uff1f<\/h1>\n

\u4eca\u5929\u5c06\u7ed9\u5927\u5bb6\u5e26\u6765\u300a\u5982\u4f55\u7528 lambdas \u521b\u5efa\u53ef\u91cd\u7528 Java \u51fd\u6570\uff1f\u300b<\/span>\uff0c\u611f\u5174\u8da3\u7684\u670b\u53cb\u8bf7\u7ee7\u7eed\u770b\u4e0b\u53bb\u5427\uff01\u4ee5\u4e0b\u5185\u5bb9\u5c06\u4f1a\u6d89\u53ca\u5230<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u4f60\u662f\u6b63\u5728\u5b66\u4e60\u6587\u7ae0<\/span>\u6216\u8005\u5df2\u7ecf\u662f\u5927\u4f6c\u7ea7\u522b\u4e86\uff0c\u90fd\u975e\u5e38\u6b22\u8fce\u4e5f\u5e0c\u671b\u5927\u5bb6\u90fd\u80fd\u7ed9\u6211\u5efa\u8bae\u8bc4\u8bba\u54c8~\u5e0c\u671b\u80fd\u5e2e\u52a9\u5230\u5927\u5bb6\uff01<\/p>\n

<\/p>\n

\u7528 Lambda \u8868\u8fbe\u5f0f\u521b\u5efa\u53ef\u91cd\u7528 Java \u51fd\u6570<\/h2>\n

Lambda \u8868\u8fbe\u5f0f\u662f Java 8 \u4e2d\u7684\u4e00\u79cd\u8bed\u6cd5\u7279\u6027\uff0c\u5b83\u5141\u8bb8\u5c06\u533f\u540d\u51fd\u6570\u58f0\u660e\u4e3a\u65b9\u6cd5\u53c2\u6570\u3002\u8fd9\u4f7f\u5f97\u521b\u5efa\u53ef\u91cd\u7528\u51fd\u6570\u53d8\u5f97\u66f4\u52a0\u5bb9\u6613\uff0c\u65e0\u9700\u7f16\u5199\u989d\u5916\u7684\u7c7b\u6216\u65b9\u6cd5\u3002<\/p>\n

\u8bed\u6cd5<\/h3>\n

Lambda \u8868\u8fbe\u5f0f\u7684\u4e00\u822c\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n

(parameters) -> {body}<\/pre>\n
\u5176\u4e2d\uff1a<\/p>\n
    \n
  • parameters\uff1a<\/strong> Lambda \u8868\u8fbe\u5f0f\u7684\u53c2\u6570\u5217\u8868\uff0c\u53ef\u4ee5\u662f\u7a7a\u3002<\/li>\n
  • body\uff1a<\/strong> Lambda \u8868\u8fbe\u5f0f\u7684\u51fd\u6570\u4f53\uff0c\u53ef\u4ee5\u5305\u542b\u4efb\u610f Java \u4ee3\u7801\u3002<\/li>\n<\/ul>\n
    \u5b9e\u6218\u6848\u4f8b<\/h3>\n
    \u521b\u5efa\u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u5927\u5199\u5b57\u6bcd\u7684\u51fd\u6570\uff1a<\/strong><\/p>\n
    Function<String, String> toUpperCase = s -> s.toUpperCase();<\/pre>\n
    \u4f7f\u7528 lambda \u8868\u8fbe\u5f0f\u5c06\u5217\u8868\u4e2d\u7684\u6240\u6709\u5143\u7d20\u8f6c\u6362\u4e3a\u5927\u5199\u5b57\u6bcd\uff1a<\/strong><\/p>\n
    List<String> originalList = Arrays.asList(\"hello\", \"world\", \"java\");\nList<String> upperCaseList = originalList.stream()\n    .map(toUpperCase)\n    .collect(Collectors.toList());<\/pre>\n
    \u4f18\u70b9<\/h3>\n
    \u4f7f\u7528 lambda \u8868\u8fbe\u5f0f\u521b\u5efa\u53ef\u91cd\u7528\u51fd\u6570\u6709\u4ee5\u4e0b\u4f18\u70b9\uff1a<\/p>\n
      \n
    • \u7b80\u5316\u4ee3\u7801\uff1a<\/strong> Lambda \u8868\u8fbe\u5f0f\u63d0\u4f9b\u4e86\u7b80\u6d01\u7684\u8bed\u6cd5\uff0c\u51cf\u5c11\u4e86\u4ee3\u7801\u91cd\u590d\u3002<\/li>\n
    • \u53ef\u8bfb\u6027\uff1a<\/strong> Lambda \u8868\u8fbe\u5f0f\u6613\u4e8e\u9605\u8bfb\u548c\u7406\u89e3\uff0c\u53ef\u4ee5\u6e05\u695a\u5730\u8868\u8fbe\u5176\u610f\u56fe\u3002<\/li>\n
    • \u53ef\u91cd\u7528\u6027\uff1a<\/strong> Lambda \u8868\u8fbe\u5f0f\u53ef\u4ee5\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u7ed9\u5176\u4ed6\u51fd\u6570\uff0c\u63d0\u9ad8\u4ee3\u7801\u590d\u7528\u6027\u3002<\/li>\n
    • \u6027\u80fd\uff1a<\/strong> Lambda \u8868\u8fbe\u5f0f\u5728\u7f16\u8bd1\u65f6\u89e3\u6790\u4e3a\u533f\u540d\u7c7b\uff0c\u5177\u6709\u4e0e\u533f\u540d\u7c7b\u76f8\u540c\u7684\u9ad8\u6027\u80fd\u3002<\/li>\n<\/ul>\n
      \u4eca\u5929\u5173\u4e8e\u300a\u5982\u4f55\u7528 lambdas \u521b\u5efa\u53ef\u91cd\u7528 Java \u51fd\u6570\uff1f\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":"
      \u5982\u4f55\u7528 lambdas \u521b\u5efa\u53ef\u91cd...<\/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-202985","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202985","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=202985"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202985\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202985"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202985"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202985"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}