{"id":202829,"date":"2025-05-22T08:45:10","date_gmt":"2025-05-22T00:45:10","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202829\/"},"modified":"2025-05-22T08:45:10","modified_gmt":"2025-05-22T00:45:10","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8%e5%bb%b6%e8%bf%9f%e6%b1%82%e5%80%bc%e4%bc%98%e5%8c%96-java-%e5%87%bd%e6%95%b0%e6%80%a7%e8%83%bd%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202829\/","title":{"rendered":"\u5982\u4f55\u4f7f\u7528\u5ef6\u8fdf\u6c42\u503c\u4f18\u5316 Java \u51fd\u6570\u6027\u80fd\uff1f"},"content":{"rendered":"

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

\u5982\u4f55\u4f7f\u7528\u5ef6\u8fdf\u6c42\u503c\u4f18\u5316 Java \u51fd\u6570\u6027\u80fd\uff1f<\/h1>\n

\u672c\u7bc7\u6587\u7ae0\u4e3b\u8981\u662f\u7ed3\u5408\u6211\u4e4b\u524d\u9762\u8bd5\u7684\u5404\u79cd\u7ecf\u5386\u548c\u5b9e\u6218\u5f00\u53d1\u4e2d\u9047\u5230\u7684\u95ee\u9898\u89e3\u51b3\u7ecf\u9a8c\u6574\u7406\u7684\uff0c\u5e0c\u671b\u8fd9\u7bc7\u300a\u5982\u4f55\u4f7f\u7528\u5ef6\u8fdf\u6c42\u503c\u4f18\u5316 Java \u51fd\u6570\u6027\u80fd\uff1f\u300b\u5bf9\u4f60\u6709\u5f88\u5927\u5e2e\u52a9\uff01\u6b22\u8fce\u6536\u85cf\uff0c\u5206\u4eab\u7ed9\u66f4\u591a\u7684\u9700\u8981\u7684\u670b\u53cb\u5b66\u4e60~<\/p>\n

\u5ef6\u8fdf\u6c42\u503c\u6280\u672f\u5728 Java \u4e2d\u4f7f\u7528 Supplier \u63a5\u53e3\u5b9e\u73b0\uff0c\u53ef\u5c06\u8ba1\u7b97\u63a8\u8fdf\u5230\u9700\u8981\u65f6\u6267\u884c\uff0c\u4ee5\u63d0\u4f9b\u4ee5\u4e0b\u6027\u80fd\u4f18\u5316\uff1a\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u8ba1\u7b97\uff1b\u5e76\u884c\u5316\u8ba1\u7b97\uff1b\u7f13\u5b58\u8ba1\u7b97\u7ed3\u679c\u3002<\/p>\n

<\/p>\n

\u5982\u4f55\u4f7f\u7528\u5ef6\u8fdf\u6c42\u503c\u4f18\u5316 Java \u51fd\u6570\u6027\u80fd<\/strong><\/p>\n

\u7b80\u4ecb<\/strong><\/p>\n

\u5ef6\u8fdf\u6c42\u503c\u662f\u8ba1\u7b97\u673a\u79d1\u5b66\u4e2d\u4e00\u79cd\u5e38\u89c1\u7684\u4f18\u5316\u6280\u672f\uff0c\u5b83\u5c06\u8ba1\u7b97\u63a8\u8fdf\u5230\u9700\u8981\u65f6\u624d\u6267\u884c\uff0c\u4ece\u800c\u6539\u5584\u6027\u80fd\u3002\u5728 Java \u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 Supplier<\/code> \u63a5\u53e3\u5b9e\u73b0\u5ef6\u8fdf\u6c42\u503c\u3002<\/p>\n

\u5ef6\u8fdf\u6c42\u503c\u7684\u6982\u5ff5<\/strong><\/p>\n

\u4f20\u7edf\u4e0a\uff0cJava \u51fd\u6570\u5728\u8c03\u7528\u65f6\u7acb\u5373\u6267\u884c\u3002\u7136\u800c\uff0c\u4f7f\u7528\u5ef6\u8fdf\u6c42\u503c\uff0c\u51fd\u6570\u5b9e\u9645\u4e0a\u53ea\u8fd4\u56de\u4e00\u4e2a\u5ef6\u8fdf\u8ba1\u7b97\u7684\u7ed3\u679c\u7684\u5bb9\u5668\u3002\u53ea\u6709\u5728\u663e\u5f0f\u8c03\u7528\u5ef6\u8fdf\u8ba1\u7b97\u5bb9\u5668\u7684 get()<\/code> \u65b9\u6cd5\u65f6\uff0c\u5b83\u624d\u4f1a\u771f\u6b63\u8ba1\u7b97\u7ed3\u679c\u3002<\/p>\n

\/\/ \u7acb\u5373\u8ba1\u7b97\nint result = calculate();\n\n\/\/ \u5ef6\u8fdf\u8ba1\u7b97\nSupplier<Integer> supplier = () -> calculate();<\/pre>\n
\u6027\u80fd\u4f18\u5316<\/strong><\/p>\n
\u5ef6\u8fdf\u6c42\u503c\u63d0\u4f9b\u4ee5\u4e0b\u6027\u80fd\u4f18\u5316\uff1a<\/p>\n
    \n
  • \u907f\u514d\u4e0d\u5fc5\u8981\u7684\u8ba1\u7b97\u3002\u5982\u679c\u5728\u51fd\u6570\u8c03\u7528\u671f\u95f4\u4e0d\u9700\u8981\u7ed3\u679c\uff0c\u5219\u53ef\u4ee5\u5b8c\u5168\u907f\u514d\u8ba1\u7b97\u3002<\/li>\n
  • \u5e76\u884c\u5316\u8ba1\u7b97\u3002\u7531\u4e8e\u5ef6\u8fdf\u8ba1\u7b97\u5bb9\u5668\u662f\u7ebf\u7a0b\u5b89\u5168\u7684\uff0c\u6211\u4eec\u53ef\u4ee5\u5e76\u884c\u8ba1\u7b97\u591a\u4e2a\u7ed3\u679c\u3002<\/li>\n
  • \u7f13\u5b58\u8ba1\u7b97\u7ed3\u679c\u3002\u6211\u4eec\u53ef\u4ee5\u5c06\u8ba1\u7b97\u7ed3\u679c\u7f13\u5b58\u5728\u5ef6\u8fdf\u8ba1\u7b97\u5bb9\u5668\u4e2d\uff0c\u4ee5\u907f\u514d\u91cd\u590d\u8ba1\u7b97\u3002<\/li>\n<\/ul>\n
    \u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n
    \u8003\u8651\u4e00\u4e2a\u9700\u8981\u5927\u91cf\u8ba1\u7b97\u624d\u80fd\u751f\u6210\u6570\u636e\u7684\u51fd\u6570\uff1a<\/p>\n
    public static List<Integer> heavyComputation() {\n    \/\/ \u6267\u884c\u5927\u91cf\u8ba1\u7b97\n    return List.of(1, 2, 3, 4, 5);\n}<\/pre>\n
    \u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u5ef6\u8fdf\u6c42\u503c\u6765\u4f18\u5316\u6b64\u51fd\u6570\uff1a<\/p>\n
    public static Supplier<List<Integer>> heavyComputationSupplier() {\n    return () -> heavyComputation();\n}<\/pre>\n
    \u73b0\u5728\uff0c\u53ea\u6709\u5728\u663e\u5f0f\u8c03\u7528 get()<\/code> \u65b9\u6cd5\u65f6\uff0c\u6b64\u51fd\u6570\u624d\u4f1a\u5b9e\u9645\u8ba1\u7b97\u7ed3\u679c\uff1a<\/p>\n
    Supplier<List<Integer>> supplier = heavyComputationSupplier();\nif (\u9700\u8981\u7ed3\u679c) {\n    supplier.get();\n}<\/pre>\n
    \u7ed3\u8bba<\/strong><\/p>\n
    \u5ef6\u8fdf\u6c42\u503c\u662f\u4e00\u79cd\u7b80\u5355\u7684\u6280\u672f\uff0c\u53ef\u4ee5\u901a\u8fc7\u63a8\u8fdf\u8ba1\u7b97\u6765\u4f18\u5316 Java \u51fd\u6570\u7684\u6027\u80fd\u3002\u901a\u8fc7\u4f7f\u7528 Supplier<\/code> \u63a5\u53e3\uff0c\u6211\u4eec\u53ef\u4ee5\u5728\u9700\u8981\u65f6\u624d\u6267\u884c\u8ba1\u7b97\uff0c\u5e76\u4eab\u53d7\u5e76\u884c\u5316\u548c\u7f13\u5b58\u8ba1\u7b97\u7ed3\u679c\u7b49\u597d\u5904\u3002<\/p>\n
    \u4ee5\u4e0a\u5c31\u662f\u300a\u5982\u4f55\u4f7f\u7528\u5ef6\u8fdf\u6c42\u503c\u4f18\u5316 Java \u51fd\u6570\u6027\u80fd\uff1f\u300b\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u5173\u4e8eJava\u4f18\u5316,\u5ef6\u8fdf\u6c42\u503c\u7684\u8d44\u6599\u8bf7\u5173\u6ce8\u516c\u4f17\u53f7\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
    \u5982\u4f55\u4f7f\u7528\u5ef6\u8fdf\u6c42\u503c\u4f18\u5316 Java ...<\/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-202829","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202829","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=202829"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202829\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202829"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202829"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202829"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}