{"id":202517,"date":"2025-05-22T08:31:34","date_gmt":"2025-05-22T00:31:34","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202517\/"},"modified":"2025-05-22T08:31:34","modified_gmt":"2025-05-22T00:31:34","slug":"%e5%a6%82%e4%bd%95%e5%9c%a8java%e4%b8%ad%e4%bd%bf%e7%94%a8lambda%e8%a1%a8%e8%be%be%e5%bc%8f%e5%88%9b%e5%bb%ba%e9%ab%98%e9%98%b6%e5%87%bd%e6%95%b0%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202517\/","title":{"rendered":"\u5982\u4f55\u5728Java\u4e2d\u4f7f\u7528Lambda\u8868\u8fbe\u5f0f\u521b\u5efa\u9ad8\u9636\u51fd\u6570\uff1f"},"content":{"rendered":"

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

\u5982\u4f55\u5728Java\u4e2d\u4f7f\u7528Lambda\u8868\u8fbe\u5f0f\u521b\u5efa\u9ad8\u9636\u51fd\u6570\uff1f<\/h1>\n

\u6700\u8fd1\u53d1\u73b0\u4e0d\u5c11\u5c0f\u4f19\u4f34\u90fd\u5bf9\u6587\u7ae0<\/span>\u5f88\u611f\u5174\u8da3\uff0c\u6240\u4ee5\u4eca\u5929\u7ee7\u7eed\u7ed9\u5927\u5bb6\u4ecb\u7ecd\u6587\u7ae0<\/span>\u76f8\u5173\u7684\u77e5\u8bc6\uff0c\u672c\u6587\u300a\u5982\u4f55\u5728Java\u4e2d\u4f7f\u7528Lambda\u8868\u8fbe\u5f0f\u521b\u5efa\u9ad8\u9636\u51fd\u6570\uff1f\u300b<\/span>\u4e3b\u8981\u5185\u5bb9\u6d89\u53ca\u5230<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5e0c\u671b\u80fd\u5e2e\u5230\u4f60\uff01\u5f53\u7136\u5982\u679c\u9605\u8bfb\u672c\u6587\u65f6\u5b58\u5728\u4e0d\u540c\u60f3\u6cd5\uff0c\u53ef\u4ee5\u5728\u8bc4\u8bba\u4e2d\u8868\u8fbe\uff0c\u4f46\u662f\u8bf7\u52ff\u4f7f\u7528\u8fc7\u6fc0\u7684\u63aa\u8f9e~<\/p>\n

\u5728 Java \u4e2d\u4f7f\u7528 lambda \u8868\u8fbe\u5f0f\u521b\u5efa\u9ad8\u9636\u51fd\u6570\uff1a\u7f16\u5199\u4e00\u4e2a\u63a5\u53d7\u51fd\u6570\u4f5c\u4e3a\u53c2\u6570\u7684\u51fd\u6570\u3002\u4f7f\u7528 lambda \u8868\u8fbe\u5f0f\u521b\u5efa\u533f\u540d\u51fd\u6570\uff0c\u8be5\u51fd\u6570\u5177\u6709\u6240\u9700\u7684\u884c\u4e3a\u3002\u5c06 lambda \u8868\u8fbe\u5f0f\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u7ed9\u9ad8\u9636\u51fd\u6570\u3002<\/p>\n

<\/p>\n

\u5982\u4f55\u5728 Java \u4e2d\u4f7f\u7528 Lambda \u8868\u8fbe\u5f0f\u521b\u5efa\u9ad8\u9636\u51fd\u6570\uff1f<\/strong><\/p>\n

\u5f15\u8a00<\/strong><\/p>\n

\u9ad8\u9636\u51fd\u6570\u662f\u4e00\u79cd\u5c06\u51fd\u6570\u4f5c\u4e3a\u53c2\u6570\u6216\u8fd4\u56de\u503c\u7684\u51fd\u6570\u3002\u5728 Java \u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 lambda \u8868\u8fbe\u5f0f\u8f7b\u677e\u5730\u521b\u5efa\u9ad8\u9636\u51fd\u6570\u3002lambda \u8868\u8fbe\u5f0f\u662f\u4e00\u79cd\u533f\u540d\u51fd\u6570\uff0c\u53ef\u4ee5\u4f20\u9012\u4efb\u610f\u6570\u91cf\u7684\u53c2\u6570\u5e76\u8fd4\u56de\u4e00\u4e2a\u503c\u3002<\/p>\n

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

lambda \u8868\u8fbe\u5f0f\u7684\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n

(parameters) -> {body}<\/pre>\n
\u5176\u4e2d\uff1a<\/p>\n
    \n
  • parameters<\/code>\uff1alambda \u8868\u8fbe\u5f0f\u7684\u53c2\u6570\u3002<\/li>\n
  • body<\/code>\uff1alambda \u8868\u8fbe\u5f0f\u7684\u5185\u5bb9\u3002<\/li>\n<\/ul>\n
    \u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n
    \u8ba9\u6211\u4eec\u4ee5\u4e00\u4e2a\u5b9e\u6218\u6848\u4f8b\u6765\u8bf4\u660e\u5982\u4f55\u5728 Java \u4e2d\u4f7f\u7528 lambda \u8868\u8fbe\u5f0f\u521b\u5efa\u9ad8\u9636\u51fd\u6570\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u60f3\u8981\u521b\u5efa\u8fd9\u6837\u4e00\u4e2a\u51fd\u6570\uff0c\u5b83\u63a5\u6536\u4e00\u4e2a\u5217\u8868\u5e76\u8fd4\u56de\u5217\u8868\u4e2d\u5143\u7d20\u7684\u5e73\u65b9\u5217\u8868\u3002<\/p>\n
    \u5e38\u89c4\u65b9\u6cd5<\/strong><\/p>\n
    import java.util.List;\n\nclass Main {\n    public static void main(String[] args) {\n        List<Integer> numbers = List.of(1, 2, 3, 4, 5);\n        List<Integer> squares = squareList(numbers);\n        System.out.println(squares);\n    }\n\n    public static List<Integer> squareList(List<Integer> numbers) {\n        List<Integer> squares = new ArrayList<>();\n        for (Integer number : numbers) {\n            squares.add(number * number);\n        }\n        return squares;\n    }\n}<\/pre>\n
    \u4f7f\u7528 Lambda \u8868\u8fbe\u5f0f\u7684\u9ad8\u9636\u51fd\u6570\u65b9\u6cd5<\/strong><\/p>\n
    import java.util.List;\n\nclass Main {\n    public static void main(String[] args) {\n        List<Integer> numbers = List.of(1, 2, 3, 4, 5);\n        List<Integer> squares = squareList(numbers, x -> x * x);\n        System.out.println(squares);\n    }\n\n    public static <T> List<T> squareList(List<T> numbers, MyFunction<T, T> function) {\n        List<T> squares = new ArrayList<>();\n        for (T number : numbers) {\n            squares.add(function.apply(number));\n        }\n        return squares;\n    }\n\n    @FunctionalInterface\n    interface MyFunction<T, R> {\n        R apply(T t);\n    }\n}<\/pre>\n
    \u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u521b\u5efa\u4e86\u4e00\u4e2a\u540d\u4e3a squareList<\/code> \u7684\u9ad8\u9636\u51fd\u6570\uff0c\u5b83\u63a5\u6536\u4e00\u4e2a\u5217\u8868\u548c\u4e00\u4e2a\u51fd\u6570\u4f5c\u4e3a\u53c2\u6570\u3002\u51fd\u6570 squareList<\/code> \u4f7f\u7528 for-each<\/code> \u5faa\u73af\u904d\u5386\u7ed9\u5b9a\u7684\u5217\u8868\u5e76\u4f7f\u7528\u63d0\u4f9b\u7684\u51fd\u6570\u5c06\u6bcf\u4e2a\u5143\u7d20\u5e73\u65b9\u3002<\/p>\n
    \u6211\u4eec\u8fd8\u521b\u5efa\u4e86\u4e00\u4e2a MyFunction<\/code> \u51fd\u6570\u5f0f\u63a5\u53e3\uff0c\u5b83\u5b9a\u4e49\u4e86\u4e00\u4e2a apply<\/code> \u65b9\u6cd5\uff0c\u8be5\u65b9\u6cd5\u5c06\u4e00\u4e2a\u7c7b\u578b\u4e3a T<\/code> \u7684\u53c2\u6570\u4f5c\u4e3a\u8f93\u5165\u5e76\u8fd4\u56de\u4e00\u4e2a\u7c7b\u578b\u4e3a R<\/code> \u7684\u503c\u3002<\/p>\n
    \u4f18\u70b9<\/strong><\/p>\n
    \u4f7f\u7528 lambda \u8868\u8fbe\u5f0f\u521b\u5efa\u9ad8\u9636\u51fd\u6570\u6709\u5f88\u591a\u4f18\u70b9\uff0c\u5305\u62ec\uff1a<\/p>\n
      \n
    • \u4ee3\u7801\u7d27\u51d1\u4e14\u6613\u4e8e\u9605\u8bfb\u3002<\/li>\n
    • \u63d0\u9ad8\u53ef\u91cd\u7528\u6027\uff0c\u56e0\u4e3a\u53ef\u4ee5\u5c06\u9ad8\u9636\u51fd\u6570\u4f20\u9012\u7ed9\u9700\u8981\u5b83\u4eec\u7684\u4ee3\u7801\u5757\u3002<\/li>\n
    • \u589e\u5f3a\u6a21\u5757\u6027\uff0c\u56e0\u4e3a\u6211\u4eec\u53ef\u4ee5\u5c06\u4e0d\u540c\u884c\u4e3a\u5206\u9694\u5230\u4e0d\u540c\u7684\u51fd\u6570\u4e2d\u3002<\/li>\n<\/ul>\n
      \u672c\u7bc7\u5173\u4e8e\u300a\u5982\u4f55\u5728Java\u4e2d\u4f7f\u7528Lambda\u8868\u8fbe\u5f0f\u521b\u5efa\u9ad8\u9636\u51fd\u6570\uff1f\u300b\u7684\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\u5566\uff0c\u4f46\u662f\u5b66\u65e0\u6b62\u5883\uff0c\u60f3\u8981\u4e86\u89e3\u5b66\u4e60\u66f4\u591a\u5173\u4e8e\u6587\u7ae0\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u8bf7\u5173\u6ce8\u516c\u4f17\u53f7\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
      \u5982\u4f55\u5728Java\u4e2d\u4f7f\u7528Lambda...<\/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-202517","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202517","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=202517"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202517\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202517"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202517"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202517"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}