{"id":202521,"date":"2025-05-22T10:52:02","date_gmt":"2025-05-22T02:52:02","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202521\/"},"modified":"2025-05-22T10:52:02","modified_gmt":"2025-05-22T02:52:02","slug":"java%e5%87%bd%e6%95%b0%e5%bc%8f%e7%bc%96%e7%a8%8b%e5%b9%b6%e8%a1%8c%e8%ae%a1%e7%ae%97%e5%ba%94%e7%94%a8%e4%ba%8e%e5%a4%a7%e6%95%b0%e6%8d%ae%e5%a4%84%e7%90%86%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202521\/","title":{"rendered":"Java\u51fd\u6570\u5f0f\u7f16\u7a0b\u5e76\u884c\u8ba1\u7b97\u5e94\u7528\u4e8e\u5927\u6570\u636e\u5904\u7406\uff1f"},"content":{"rendered":"

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

Java\u51fd\u6570\u5f0f\u7f16\u7a0b\u5e76\u884c\u8ba1\u7b97\u5e94\u7528\u4e8e\u5927\u6570\u636e\u5904\u7406\uff1f<\/h1>\n

\u4e00\u5206\u8015\u8018\uff0c\u4e00\u5206\u6536\u83b7\uff01\u65e2\u7136\u6253\u5f00\u4e86\u8fd9\u7bc7\u6587\u7ae0\u300aJava\u51fd\u6570\u5f0f\u7f16\u7a0b\u5e76\u884c\u8ba1\u7b97\u5e94\u7528\u4e8e\u5927\u6570\u636e\u5904\u7406\uff1f\u300b<\/span>\uff0c\u5c31\u575a\u6301\u770b\u4e0b\u53bb\u5427\uff01\u6587\u4e2d\u5185\u5bb9\u5305\u542b<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9…\u5e0c\u671b\u4f60\u80fd\u5728\u9605\u8bfb\u672c\u6587\u540e\uff0c\u80fd\u771f\u771f\u5b9e\u5b9e\u5b66\u5230\u77e5\u8bc6\u6216\u8005\u5e2e\u4f60\u89e3\u51b3\u5fc3\u4e2d\u7684\u7591\u60d1\uff0c\u4e5f\u6b22\u8fce\u5927\u4f6c\u6216\u8005\u65b0\u4eba\u670b\u53cb\u4eec\u591a\u7559\u8a00\u8bc4\u8bba\uff0c\u591a\u7ed9\u5efa\u8bae\uff01\u8c22\u8c22\uff01<\/p>\n

Java\u51fd\u6570\u5f0f\u7f16\u7a0b\u4e3a\u5e76\u884c\u8ba1\u7b97\u63d0\u4f9b\u4e86\u5f3a\u5927\u652f\u6301\uff0c\u53ef\u5229\u7528\u6d41\u5f0fAPI\u7684\u5e76\u884c\u64cd\u4f5c\uff0c\u5c06\u6570\u636e\u62c6\u5206\u4e3a\u591a\u5757\uff0c\u5e76\u4f7f\u7528\u591a\u7ebf\u7a0b\u8fdb\u884c\u5e76\u884c\u5904\u7406\u3002\u5b9e\u6218\u6848\u4f8b\u4e2d\uff0c\u4f7f\u7528\u5e76\u884c\u6c42\u548c\u64cd\u4f5c\u5bf9\u5927\u6570\u636e\u91cf\u6574\u6570\u6570\u7ec4\u6c42\u548c\uff0c\u5927\u5e45\u7f29\u77ed\u4e86\u8ba1\u7b97\u65f6\u95f4\u3002Java\u51fd\u6570\u5f0f\u7f16\u7a0b\u5e76\u884c\u8ba1\u7b97\u7684\u4f18\u70b9\u5305\u62ec\uff1a\u63d0\u9ad8\u8ba1\u7b97\u6548\u7387\u3001\u53ef\u6269\u5c55\u6027\u4ee5\u53ca\u4ee3\u7801\u7b80\u6d01\u6027\uff0c\u9002\u7528\u4e8e\u5904\u7406\u5927\u6570\u636e\u91cf\u3001\u590d\u6742\u8ba1\u7b97\u53ca\u65f6\u6548\u6027\u8981\u6c42\u9ad8\u7684\u573a\u666f\u3002<\/p>\n

<\/p>\n

Java \u51fd\u6570\u5f0f\u7f16\u7a0b\u5e76\u884c\u8ba1\u7b97\u5728\u6570\u636e\u5904\u7406\u4e2d\u7684\u5e94\u7528<\/strong><\/p>\n

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

\u5728\u5904\u7406\u5927\u6570\u636e\u91cf\u65f6\uff0c\u5e76\u884c\u8ba1\u7b97\u662f\u63d0\u9ad8\u8ba1\u7b97\u6548\u7387\u7684\u5173\u952e\u56e0\u7d20\u3002Java \u7684\u51fd\u6570\u5f0f\u7f16\u7a0b\u7279\u6027\uff0c\u5982 lambda \u8868\u8fbe\u5f0f\u548c\u6d41\u5904\u7406\uff0c\u4e3a\u9ad8\u6548\u7684\u5e76\u884c\u8ba1\u7b97\u63d0\u4f9b\u4e86\u5f3a\u5927\u7684\u652f\u6301\u3002<\/p>\n

Java \u51fd\u6570\u5f0f\u7f16\u7a0b\u5e76\u884c\u8ba1\u7b97<\/strong><\/p>\n

\u4f7f\u7528 Java \u7684\u51fd\u6570\u5f0f\u7f16\u7a0b\u8fdb\u884c\u5e76\u884c\u8ba1\u7b97\uff0c\u53ef\u4ee5\u5229\u7528\u6d41\u5f0f API \u4e2d\u7684\u5e76\u884c\u64cd\u4f5c\uff0c\u5982 parallelStream()<\/code> \u548c forEachParallel()<\/code>\u3002\u8fd9\u4e9b\u64cd\u4f5c\u5141\u8bb8\u5c06\u6570\u636e\u6d41\u62c6\u5206\u4e3a\u591a\u4e2a\u5757\uff0c\u5e76\u4f7f\u7528\u591a\u6838\u5904\u7406\u5668\u4e0a\u7684\u591a\u4e2a\u7ebf\u7a0b\u5bf9\u8fd9\u4e9b\u5757\u8fdb\u884c\u5e76\u884c\u5904\u7406\u3002<\/p>\n

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

\u8003\u8651\u4e00\u4e2a\u5305\u542b\u5927\u91cf\u6574\u6570\u6570\u7ec4\u7684\u5927\u6570\u636e\u6587\u4ef6\uff0c\u9700\u8981\u5bf9\u6bcf\u4e2a\u6570\u7ec4\u8fdb\u884c\u6c42\u548c\u64cd\u4f5c\u3002\u4f7f\u7528\u4f20\u7edf\u7684\u4e32\u884c\u65b9\u6cd5\uff0c\u4f1a\u9010\u4e00\u5904\u7406\u6bcf\u4e2a\u6570\u7ec4\uff0c\u975e\u5e38\u8017\u65f6\u3002<\/p>\n

\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 Java \u7684\u51fd\u6570\u5f0f\u7f16\u7a0b\u5e76\u884c\u8ba1\u7b97\u6765\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff1a<\/p>\n

import java.util.Arrays;\nimport java.util.stream.IntStream;\n\npublic class SumOfArrays {\n\n  public static void main(String[] args) {\n    int[][] arrays = \/\/ \u5927\u6570\u636e\u91cf\u6574\u6570\u6570\u7ec4\u6570\u636e\n\n    long startTime = System.currentTimeMillis();\n\n    \/\/ \u5e76\u884c\u6c42\u548c\u64cd\u4f5c\n    long totalSum = Arrays.stream(arrays)\n        .parallel()\n        .flatMapToInt(IntStream::of)\n        .sum();\n\n    System.out.println(\"\u5e76\u884c\u6c42\u548c\u7ed3\u679c\uff1a\" + totalSum);\n    System.out.println(\"\u7528\u65f6\uff1a\" + (System.currentTimeMillis() - startTime) + \" \u6beb\u79d2\");\n  }\n}<\/pre>\n
\u4f18\u70b9<\/strong><\/p>\n
    \n
  • \u63d0\u9ad8\u8ba1\u7b97\u6548\u7387\uff1a\u5e76\u884c\u8ba1\u7b97\u5229\u7528\u4e86\u591a\u6838\u5904\u7406\u5668\u7684\u80fd\u529b\uff0c\u5927\u5e45\u7f29\u77ed\u8ba1\u7b97\u65f6\u95f4\u3002<\/li>\n
  • \u53ef\u6269\u5c55\u6027\uff1a\u5e76\u884c\u8ba1\u7b97\u7b97\u6cd5\u53ef\u4ee5\u6839\u636e\u5904\u7406\u5668\u7684\u6838\u5fc3\u6570\u8fdb\u884c\u6269\u5c55\uff0c\u5b9e\u73b0\u66f4\u597d\u7684\u6027\u80fd\u3002<\/li>\n
  • \u4ee3\u7801\u7b80\u6d01\uff1aJava \u7684\u51fd\u6570\u5f0f\u7f16\u7a0b\u7279\u6027\u7b80\u5316\u4e86\u5e76\u884c\u4ee3\u7801\u7684\u7f16\u5199\uff0c\u63d0\u4f9b\u4e86\u7b80\u6d01\u4e14\u53ef\u8bfb\u6027\u5f3a\u7684\u8bed\u6cd5\u3002<\/li>\n<\/ul>\n
    \u9002\u7528\u573a\u666f<\/strong><\/p>\n
    Java \u51fd\u6570\u5f0f\u7f16\u7a0b\u5e76\u884c\u8ba1\u7b97\u5728\u4ee5\u4e0b\u573a\u666f\u4e2d\u7279\u522b\u9002\u5408\uff1a<\/p>\n
      \n
    • \u9700\u8981\u5904\u7406\u5927\u6570\u636e\u91cf\u7684\u6570\u636e<\/li>\n
    • \u9700\u8981\u5bf9\u6570\u636e\u8fdb\u884c\u590d\u6742\u8ba1\u7b97<\/li>\n
    • \u9700\u8981\u5728\u65f6\u6548\u6027\u4e0a\u8981\u6c42\u9ad8\u7684\u5904\u7406\u573a\u666f<\/li>\n<\/ul>\n
      \u7ed3\u8bba<\/strong><\/p>\n
      Java \u51fd\u6570\u5f0f\u7f16\u7a0b\u63d0\u4f9b\u7684\u5e76\u884c\u8ba1\u7b97\u80fd\u529b\uff0c\u53ef\u4ee5\u663e\u8457\u63d0\u9ad8\u5927\u6570\u636e\u5904\u7406\u6548\u7387\u3002\u901a\u8fc7\u4f7f\u7528 stream API\uff0c\u6211\u4eec\u53ef\u4ee5\u8f7b\u677e\u7f16\u5199\u5e76\u884c\u4ee3\u7801\uff0c\u5145\u5206\u5229\u7528\u591a\u6838\u5904\u7406\u5668\u8d44\u6e90\uff0c\u5b9e\u73b0\u6700\u4f73\u6027\u80fd\u3002<\/p>\n
      \u7406\u8bba\u8981\u638c\u63e1\uff0c\u5b9e\u64cd\u4e0d\u80fd\u843d\uff01\u4ee5\u4e0a\u5173\u4e8e\u300aJava\u51fd\u6570\u5f0f\u7f16\u7a0b\u5e76\u884c\u8ba1\u7b97\u5e94\u7528\u4e8e\u5927\u6570\u636e\u5904\u7406\uff1f\u300b\u7684\u8be6\u7ec6\u4ecb\u7ecd\uff0c\u5927\u5bb6\u90fd\u638c\u63e1\u4e86\u5427\uff01\u5982\u679c\u60f3\u8981\u7ee7\u7eed\u63d0\u5347\u81ea\u5df1\u7684\u80fd\u529b\uff0c\u90a3\u4e48\u5c31\u6765\u5173\u6ce8\u516c\u4f17\u53f7\u5427\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
      Java\u51fd\u6570\u5f0f\u7f16\u7a0b\u5e76\u884c\u8ba1\u7b97\u5e94\u7528\u4e8e...<\/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-202521","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202521","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=202521"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202521\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202521"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202521"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202521"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}