{"id":202742,"date":"2025-05-22T11:26:08","date_gmt":"2025-05-22T03:26:08","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202742\/"},"modified":"2025-05-22T11:26:08","modified_gmt":"2025-05-22T03:26:08","slug":"%e6%8f%90%e5%8d%87java%e5%87%bd%e6%95%b0%e5%8f%af%e5%a4%8d%e7%94%a8%e6%80%a7%e7%9a%84%e6%9b%bf%e4%bb%a3%e6%96%b9%e6%a1%88%ef%bc%9a%e6%96%b9%e6%b3%95%e5%bc%95%e7%94%a8","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202742\/","title":{"rendered":"\u63d0\u5347Java\u51fd\u6570\u53ef\u590d\u7528\u6027\u7684\u66ff\u4ee3\u65b9\u6848\uff1a\u65b9\u6cd5\u5f15\u7528"},"content":{"rendered":"

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

\u63d0\u5347Java\u51fd\u6570\u53ef\u590d\u7528\u6027\u7684\u66ff\u4ee3\u65b9\u6848\uff1a\u65b9\u6cd5\u5f15\u7528<\/h1>\n

\u6587\u7ae0<\/span>\u4e0d\u77e5\u9053\u5927\u5bb6\u662f\u5426\u719f\u6089\uff1f\u4eca\u5929\u6211\u5c06\u7ed9\u5927\u5bb6\u4ecb\u7ecd\u300a\u63d0\u5347Java\u51fd\u6570\u53ef\u590d\u7528\u6027\u7684\u66ff\u4ee3\u65b9\u6848\uff1a\u65b9\u6cd5\u5f15\u7528\u300b<\/span>\uff0c\u8fd9\u7bc7\u6587\u7ae0\u4e3b\u8981\u4f1a\u8bb2\u5230<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u4f60\u5728\u770b\u5b8c\u672c\u7bc7\u6587\u7ae0\u540e\uff0c\u6709\u66f4\u597d\u7684\u5efa\u8bae\u6216\u8005\u53d1\u73b0\u54ea\u91cc\u6709\u95ee\u9898\uff0c\u5e0c\u671b\u5927\u5bb6\u90fd\u80fd\u79ef\u6781\u8bc4\u8bba\u6307\u51fa\uff0c\u8c22\u8c22\uff01\u5e0c\u671b\u6211\u4eec\u80fd\u4e00\u8d77\u52a0\u6cb9\u8fdb\u6b65\uff01<\/p>\n

\u65b9\u6cd5\u5f15\u7528\u63d0\u4f9b\u4e86\u4e00\u79cd\u63d0\u5347 Java \u51fd\u6570\u53ef\u590d\u7528\u6027\u7684\u7b80\u6d01\u66ff\u4ee3\u65b9\u6848\uff0c\u5b83\u5141\u8bb8\u76f4\u63a5\u5f15\u7528\u65b9\u6cd5\uff0c\u8bed\u6cd5\u4e3a\uff1aClass::methodName\u3002\u65b9\u6cd5\u5f15\u7528\u53ef\u4ee5\u50cf lambda \u8868\u8fbe\u5f0f\u4e00\u6837\u4f7f\u7528\uff0c\u4f8b\u5982\u5b9e\u73b0\u6bd4\u8f83\u5668\uff1aComparator<Person> comparator = Person::compareTo; \u4f7f\u7528\u65b9\u6cd5\u5f15\u7528\u63d0\u4f9b\u4e86\u66f4\u597d\u7684\u53ef\u8bfb\u6027\u3001\u7b80\u6d01\u6027\u548c\u7ef4\u62a4\u6027\uff0c\u4f46\u5c40\u9650\u4e8e\u53ea\u80fd\u5f15\u7528\u7279\u5b9a\u7c7b\u4e2d\u7684\u65b9\u6cd5\uff0c\u4e14\u65e0\u6cd5\u4fee\u6539\u65b9\u6cd5\u4f53\u3002<\/p>\n

<\/p>\n

\u65b9\u6cd5\u5f15\u7528\uff1a\u63d0\u5347 Java \u51fd\u6570\u53ef\u590d\u7528\u6027\u7684\u66ff\u4ee3\u65b9\u6848<\/strong><\/p>\n

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

\u5728 Java \u4e2d\uff0c\u5b58\u5728\u4e00\u4e9b\u63d0\u5347\u51fd\u6570\u53ef\u590d\u7528\u6027\u7684\u6280\u672f\uff0c\u65b9\u6cd5\u5f15\u7528\u4fbf\u662f\u5176\u4e2d\u4e00\u79cd\u3002\u5b83\u63d0\u4f9b\u4e86\u6bd4 lambda \u8868\u8fbe\u5f0f\u66f4\u7b80\u6d01\u7684\u8bed\u6cd5\uff0c\u540c\u65f6\u4fdd\u6301\u4e86\u540c\u6837\u7684\u529f\u80fd\u6027\u3002<\/p>\n

\u4ec0\u4e48\u662f\u65b9\u6cd5\u5f15\u7528\uff1f<\/strong><\/p>\n

\u65b9\u6cd5\u5f15\u7528\u662f\u4e00\u79cd\u6307\u5411\u65b9\u6cd5\u7684\u5f15\u7528\uff0c\u5b83\u4e0e lambda \u8868\u8fbe\u5f0f\u975e\u5e38\u76f8\u4f3c\uff0c\u4f46\u66f4\u7b80\u5355\u3002\u5b83\u7684\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n

Class::methodName<\/pre>\n
\u5176\u4e2d\uff1a<\/p>\n
    \n
  • Class<\/code> \u662f\u5305\u542b\u65b9\u6cd5\u7684\u7c7b<\/li>\n
  • methodName<\/code> \u662f\u65b9\u6cd5\u540d\u79f0<\/li>\n<\/ul>\n
    \u7528\u6cd5<\/strong><\/p>\n
    \u65b9\u6cd5\u5f15\u7528\u53ef\u4ee5\u50cf lambda \u8868\u8fbe\u5f0f\u4e00\u6837\u4f7f\u7528\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u65b9\u6cd5\u5f15\u7528\u6765\u5b9e\u73b0\u4e00\u4e2a\u6bd4\u8f83\u5668\uff1a<\/p>\n
    Comparator<Person> comparator = Person::compareTo;<\/pre>\n
    \u8fd9\u4e2a\u65b9\u6cd5\u5f15\u7528\u6307\u5411\u4e86 Person<\/code> \u7c7b\u7684 compareTo<\/code> \u65b9\u6cd5\u3002\u8fd9\u4e0e\u4ee5\u4e0b lambda \u8868\u8fbe\u5f0f\u7b49\u6548\uff1a<\/p>\n
    Comparator<Person> comparator = (p1, p2) -> p1.compareTo(p2);<\/pre>\n
    \u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n
    \u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f7f\u7528\u65b9\u6cd5\u5f15\u7528\u7684\u5b9e\u6218\u6848\u4f8b\uff1a<\/p>\n
    List<Integer> numbers = List.of(1, 2, 3, 4, 5);\n\n\/\/ \u4f7f\u7528\u65b9\u6cd5\u5f15\u7528\u8ba1\u7b97\u6570\u5b57\u5217\u8868\u7684\u548c\nint sum = numbers.stream().reduce(0, Integer::sum);\n\n\/\/ \u4f7f\u7528 lambda \u8868\u8fbe\u5f0f\u8ba1\u7b97\u6570\u5b57\u5217\u8868\u7684\u548c\nint sum = numbers.stream().reduce(0, (x, y) -> x + y);<\/pre>\n
    \u4f18\u70b9<\/strong><\/p>\n
    \u4f7f\u7528\u65b9\u6cd5\u5f15\u7528\u7684\u4f18\u70b9\u5305\u62ec\uff1a<\/p>\n
      \n
    • \u7b80\u6d01\u7684\u8bed\u6cd5<\/li>\n
    • \u66f4\u597d\u7684\u53ef\u8bfb\u6027<\/li>\n
    • \u63d0\u9ad8\u4ee3\u7801\u7ef4\u62a4\u6027<\/li>\n<\/ul>\n
      \u5c40\u9650\u6027<\/strong><\/p>\n
      \u65b9\u6cd5\u5f15\u7528\u7684\u5c40\u9650\u6027\u5305\u62ec\uff1a<\/p>\n
        \n
      • \u53ea\u80fd\u5f15\u7528\u7279\u5b9a\u7c7b\u4e2d\u7684\u65b9\u6cd5<\/li>\n
      • \u65e0\u6cd5\u4fee\u6539\u65b9\u6cd5\u4f53<\/li>\n<\/ul>\n
        \u7ed3\u8bba<\/strong><\/p>\n
        \u65b9\u6cd5\u5f15\u7528\u662f\u63d0\u5347 Java \u51fd\u6570\u53ef\u590d\u7528\u6027\u7684\u5f3a\u5927\u5de5\u5177\u3002\u5b83\u4eec\u63d0\u4f9b\u4e86\u4e00\u79cd\u7b80\u6d01\u3001\u53ef\u8bfb\u4e14\u53ef\u7ef4\u62a4\u7684\u65b9\u6cd5\u6765\u5f15\u7528\u65b9\u6cd5\u3002<\/p>\n
        \u7406\u8bba\u8981\u638c\u63e1\uff0c\u5b9e\u64cd\u4e0d\u80fd\u843d\uff01\u4ee5\u4e0a\u5173\u4e8e\u300a\u63d0\u5347Java\u51fd\u6570\u53ef\u590d\u7528\u6027\u7684\u66ff\u4ee3\u65b9\u6848\uff1a\u65b9\u6cd5\u5f15\u7528\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":"
        \u63d0\u5347Java\u51fd\u6570\u53ef\u590d\u7528\u6027\u7684\u66ff\u4ee3\u65b9...<\/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-202742","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202742","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=202742"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202742\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202742"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202742"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202742"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}