{"id":203108,"date":"2025-05-22T11:50:35","date_gmt":"2025-05-22T03:50:35","guid":{"rendered":"https:\/\/server.hk\/cnblog\/203108\/"},"modified":"2025-05-22T11:50:35","modified_gmt":"2025-05-22T03:50:35","slug":"%e9%ab%98%e9%98%b6%e5%87%bd%e6%95%b0%e5%9c%a8-java-%e5%87%bd%e6%95%b0%e5%bc%8f%e5%ba%93%e4%b8%ad%e7%9a%84%e5%ae%9e%e7%8e%b0%e6%96%b9%e5%bc%8f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/203108\/","title":{"rendered":"\u9ad8\u9636\u51fd\u6570\u5728 Java \u51fd\u6570\u5f0f\u5e93\u4e2d\u7684\u5b9e\u73b0\u65b9\u5f0f"},"content":{"rendered":"

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

\u9ad8\u9636\u51fd\u6570\u5728 Java \u51fd\u6570\u5f0f\u5e93\u4e2d\u7684\u5b9e\u73b0\u65b9\u5f0f<\/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\u9ad8\u9636\u51fd\u6570\u5728 Java \u51fd\u6570\u5f0f\u5e93\u4e2d\u7684\u5b9e\u73b0\u65b9\u5f0f\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

<\/p>\n

\u9ad8\u9636\u51fd\u6570\u5728 Java \u51fd\u6570\u5f0f\u5e93\u4e2d\u7684\u5b9e\u73b0\u65b9\u5f0f<\/h2>\n

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

\u51fd\u6570\u5f0f\u7f16\u7a0b\u7684\u4e00\u4e2a\u91cd\u8981\u7279\u5f81\u662f\u4f7f\u7528\u9ad8\u9636\u51fd\u6570\uff0c\u5373\u53ef\u4ee5\u63a5\u6536\u5176\u4ed6\u51fd\u6570\u4f5c\u4e3a\u53c2\u6570\u6216\u8fd4\u56de\u503c\u7684\u51fd\u6570\u3002Java \u4e2d\u7684\u51fd\u6570\u5f0f\u5e93\u63d0\u4f9b\u4e86\u8bb8\u591a\u5185\u7f6e\u7684\u9ad8\u9636\u51fd\u6570\uff0c\u4f8b\u5982 map()<\/code>\u3001filter()<\/code> \u548c reduce()<\/code>\u3002<\/p>\n

\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n

\u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f7f\u7528\u9ad8\u9636\u51fd\u6570\u7684 Java \u5b9e\u6218\u6848\u4f8b\uff1a<\/p>\n

import java.util.Arrays;\nimport java.util.List;\n\npublic class HighOrderFunctionsExample {\n\n    public static void main(String[] args) {\n        List<Integer> numbers = Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);\n\n        \/\/ \u4f7f\u7528 map() \u51fd\u6570\u5c06\u6240\u6709\u6570\u5b57\u4e58\u4ee5 2\n        List<Integer> doubledNumbers = numbers.stream()\n                .map(n -> n * 2)\n                .toList();\n\n        \/\/ \u4f7f\u7528 filter() \u51fd\u6570\u8fc7\u6ee4\u51fa\u5927\u4e8e 5 \u7684\u6570\u5b57\n        List<Integer> filteredNumbers = numbers.stream()\n                .filter(n -> n > 5)\n                .toList();\n\n        \/\/ \u4f7f\u7528 reduce() \u51fd\u6570\u8ba1\u7b97\u6240\u6709\u6570\u5b57\u7684\u548c\n        int sum = numbers.stream()\n                .reduce(0, (a, b) -> a + b);\n\n        System.out.println(\"Doubled numbers: \" + doubledNumbers);\n        System.out.println(\"Filtered numbers: \" + filteredNumbers);\n        System.out.println(\"Sum of all numbers: \" + sum);\n    }\n}<\/pre>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528 map()<\/code> \u9ad8\u9636\u51fd\u6570\u5c06\u6bcf\u4e2a\u6570\u5b57\u4e58\u4ee5 2\uff0c\u4f7f\u7528 filter()<\/code> \u9ad8\u9636\u51fd\u6570\u8fc7\u6ee4\u51fa\u5927\u4e8e 5 \u7684\u6570\u5b57\uff0c\u6700\u540e\u4f7f\u7528 reduce()<\/code> \u9ad8\u9636\u51fd\u6570\u8ba1\u7b97\u6240\u6709\u6570\u5b57\u7684\u548c\u3002<\/p>\n
\u4e0d\u540c\u51fd\u6570\u5f0f\u5e93\u7684\u9ad8\u9636\u51fd\u6570\u5b9e\u73b0\u65b9\u5f0f<\/strong><\/p>\n
Java \u4e2d\u6709\u8bb8\u591a\u51fd\u6570\u5f0f\u5e93\u63d0\u4f9b\u4e86\u9ad8\u9636\u51fd\u6570\uff0c\u4f8b\u5982\uff1a<\/p>\n
    \n
  • Javassist<\/strong>\uff1a\u63d0\u4f9b\u9ad8\u7ea7\u5b57\u8282\u7801\u64cd\u4f5c\uff0c\u5141\u8bb8\u52a8\u6001\u5730\u4fee\u6539\u548c\u521b\u5efa\u7c7b<\/li>\n
  • Lambdaj<\/strong>\uff1a\u63d0\u4f9b\u9ad8\u9636\u51fd\u6570\u7684\u7b80\u6d01\u8bed\u6cd5\uff0c\u7c7b\u4f3c\u4e8e Groovy<\/li>\n
  • Scoverage<\/strong>\uff1a\u63d0\u4f9b\u4ee3\u7801\u8986\u76d6\u548c\u6d4b\u8bd5\u8986\u76d6\u7387\u5206\u6790\uff0c\u4f7f\u7528\u9ad8\u9636\u51fd\u6570\u6765\u68c0\u67e5\u4ee3\u7801\u8986\u76d6\u7387<\/li>\n
  • Closure<\/strong>\uff1a\u63d0\u4f9b\u7c7b\u4f3c Groovy \u7684\u95ed\u5305\u652f\u6301\uff0c\u5141\u8bb8\u521b\u5efa\u533f\u540d\u51fd\u6570\u548c\u95ed\u5305<\/li>\n
  • FunctionJ<\/strong>\uff1a\u63d0\u4f9b\u4e00\u4e2a\u5168\u9762\u7684\u51fd\u6570\u548c\u9ad8\u9636\u51fd\u6570\u5e93\uff0c\u7528\u4e8e\u51fd\u6570\u5f0f\u7f16\u7a0b<\/li>\n<\/ul>\n
    \u7ed3\u8bba<\/strong><\/p>\n
    \u9ad8\u9636\u51fd\u6570\u662f\u51fd\u6570\u5f0f\u7f16\u7a0b\u4e2d\u5f3a\u5927\u800c\u901a\u7528\u7684\u5de5\u5177\u3002Java \u4e2d\u7684\u51fd\u6570\u5f0f\u5e93\u63d0\u4f9b\u4e86\u8bb8\u591a\u5185\u7f6e\u7684\u9ad8\u9636\u51fd\u6570\uff0c\u5141\u8bb8\u6211\u4eec\u7f16\u5199\u66f4\u7075\u6d3b\u548c\u53ef\u91cd\u7528\u7684\u4ee3\u7801\u3002<\/p>\n
    \u597d\u4e86\uff0c\u672c\u6587\u5230\u6b64\u7ed3\u675f\uff0c\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u300a\u9ad8\u9636\u51fd\u6570\u5728 Java \u51fd\u6570\u5f0f\u5e93\u4e2d\u7684\u5b9e\u73b0\u65b9\u5f0f\u300b\uff0c\u5e0c\u671b\u672c\u6587\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff01\u5173\u6ce8\u516c\u4f17\u53f7\uff0c\u7ed9\u5927\u5bb6\u5206\u4eab\u66f4\u591a\u6587\u7ae0\u77e5\u8bc6\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
    \u9ad8\u9636\u51fd\u6570\u5728 Java \u51fd\u6570\u5f0f\u5e93\u4e2d...<\/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-203108","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203108","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=203108"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203108\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=203108"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=203108"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=203108"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}