{"id":202775,"date":"2025-05-22T11:46:24","date_gmt":"2025-05-22T03:46:24","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202775\/"},"modified":"2025-05-22T11:46:24","modified_gmt":"2025-05-22T03:46:24","slug":"java-%e4%b8%ad%e6%96%b9%e6%b3%95%e9%87%8d%e8%bd%bd%e7%9a%84%e8%a7%84%e5%88%99%e6%9c%89%e5%93%aa%e4%ba%9b%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202775\/","title":{"rendered":"Java \u4e2d\u65b9\u6cd5\u91cd\u8f7d\u7684\u89c4\u5219\u6709\u54ea\u4e9b\uff1f"},"content":{"rendered":"

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

Java \u4e2d\u65b9\u6cd5\u91cd\u8f7d\u7684\u89c4\u5219\u6709\u54ea\u4e9b\uff1f<\/h1>\n

\u6587\u7ae0<\/span>\u4e0d\u77e5\u9053\u5927\u5bb6\u662f\u5426\u719f\u6089\uff1f\u4eca\u5929\u6211\u5c06\u7ed9\u5927\u5bb6\u4ecb\u7ecd\u300aJava \u4e2d\u65b9\u6cd5\u91cd\u8f7d\u7684\u89c4\u5219\u6709\u54ea\u4e9b\uff1f\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

Java \u4e2d\u65b9\u6cd5\u91cd\u8f7d\u89c4\u5219\uff1a\u65b9\u6cd5\u540d\u79f0\u76f8\u540c\u3002\u53c2\u6570\u5217\u8868\u4e0d\u540c\uff08\u6570\u91cf\u3001\u987a\u5e8f\u6216\u7c7b\u578b\uff09\u3002\u8fd4\u56de\u503c\u7c7b\u578b\u53ef\u4ee5\u4e0d\u540c\uff08\u4f46\u6784\u9020\u51fd\u6570\u8fd4\u56de\u5bf9\u8c61\u7c7b\u578b\uff0c@Override \u65b9\u6cd5\u8fd4\u56de\u4e0e\u7236\u7c7b\u76f8\u540c\u7c7b\u578b\uff09\u3002<\/p>\n

<\/p>\n

Java \u4e2d\u65b9\u6cd5\u91cd\u8f7d\u7684\u89c4\u5219<\/strong><\/p>\n

\u65b9\u6cd5\u91cd\u8f7d\u662f\u540c\u4e00\u7c7b\u4e2d\u4f7f\u7528\u76f8\u540c\u540d\u79f0\u4f46\u5177\u6709\u4e0d\u540c\u53c2\u6570\u5217\u8868\u6216\u8fd4\u56de\u503c\u7684\u65b9\u6cd5\u3002\u5b83\u5141\u8bb8\u4f60\u5728\u540c\u4e00\u4f5c\u7528\u57df\u4e2d\u521b\u5efa\u5177\u6709\u7c7b\u4f3c\u529f\u80fd\u4f46\u53c2\u6570\u4e0d\u540c\u7684\u65b9\u6cd5\u3002<\/p>\n

\u89c4\u5219\uff1a<\/strong><\/p>\n

    \n
  1. \u65b9\u6cd5\u540d\u79f0\u5fc5\u987b\u76f8\u540c\uff1a<\/strong>\u6240\u6709\u91cd\u8f7d\u7684\u65b9\u6cd5\u5fc5\u987b\u5177\u6709\u76f8\u540c\u7684\u540d\u79f0\u3002<\/li>\n
  2. \u53c2\u6570\u5217\u8868\u5fc5\u987b\u4e0d\u540c\uff1a<\/strong>\u91cd\u8f7d\u65b9\u6cd5\u5fc5\u987b\u5177\u6709\u4e0d\u540c\u7684\u53c2\u6570\u5217\u8868\u3002\u8fd9\u5305\u62ec\u53c2\u6570\u6570\u91cf\u3001\u987a\u5e8f\u6216\u7c7b\u578b\u3002<\/li>\n
  3. \u8fd4\u56de\u503c\u53ef\u4ee5\u4e0d\u540c\uff1a<\/strong>\u65b9\u6cd5\u7684\u8fd4\u56de\u503c\u7c7b\u578b\u53ef\u4ee5\u4e0d\u540c\uff0c\u5373\u4f7f\u53c2\u6570\u5217\u8868\u76f8\u540c\u3002\u4f46\u662f\uff0c\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u8981\u4e48<\/strong>\u8be5\u65b9\u6cd5\u662f\u6784\u9020\u51fd\u6570<\/strong>\uff08\u5e76\u4e14\u8fd4\u56de\u7684\u5bf9\u8c61\u7c7b\u578b\uff09\uff0c\u8981\u4e48\u5b83\u662f @Override \u65b9\u6cd5<\/strong>\uff08\u5e76\u4e14\u8fd4\u56de\u4e0e\u7236\u7c7b\u65b9\u6cd5\u76f8\u540c\u7684\u7c7b\u578b\uff09\u3002<\/li>\n<\/ol>\n

    \u5b9e\u6218\u6848\u4f8b\uff1a<\/strong><\/p>\n

    \u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u51e0\u4f55\u5f62\u72b6\u7c7b Shape<\/code>\uff0c\u5b83\u6709\u4e24\u4e2a\u91cd\u8f7d\u7684\u65b9\u6cd5 area()<\/code>\uff1a<\/p>\n

    public abstract class Shape {\n    public abstract double area();\n\n    public double area(double radius) {\n        return Math.PI * radius * radius;\n    }\n}<\/pre>\n
    \u7b2c\u4e00\u4e2a area()<\/code> \u65b9\u6cd5\u662f\u62bd\u8c61\u7684\uff0c\u5fc5\u987b\u7531\u5b50\u7c7b\u5b9e\u73b0\u3002\u7b2c\u4e8c\u4e2a area()<\/code> \u65b9\u6cd5\u63a5\u6536\u4e00\u4e2a radius<\/code> \u53c2\u6570\u5e76\u8ba1\u7b97\u5706\u7684\u9762\u79ef\u3002<\/p>\n
    \u901a\u8fc7\u91cd\u8f7d area()<\/code> \u65b9\u6cd5\uff0c\u6211\u4eec\u53ef\u4ee5\u8986\u76d6\u7236\u7c7b\u7684 area()<\/code> \u5b9e\u73b0\uff0c\u5e76\u4e3a Shape<\/code> \u63d0\u4f9b\u4e00\u4e2a\u8ba1\u7b97\u5706\u5f62\u9762\u79ef\u7684\u7279\u5b9a\u65b9\u6cd5\u3002<\/p>\n
    \u9700\u8981\u6ce8\u610f\u7684\u4f8b\u5916\u60c5\u51b5\uff1a<\/strong><\/p>\n
      \n
    • \u6784\u9020\u51fd\u6570\uff1a<\/strong>\u6784\u9020\u51fd\u6570\u4e5f\u53ef\u4ee5\u91cd\u8f7d\uff0c\u5373\u4f7f\u5b83\u4eec\u6ca1\u6709\u8fd4\u56de\u503c\u3002<\/li>\n
    • @Override \u65b9\u6cd5\uff1a<\/strong>\u91cd\u5199\u65b9\u6cd5\u53ef\u4ee5\u5177\u6709\u4e0e\u7236\u7c7b\u65b9\u6cd5\u76f8\u540c\u7684\u53c2\u6570\u7c7b\u578b\uff0c\u4f46\u8fd4\u56de\u503c\u7c7b\u578b\u5fc5\u987b\u76f8\u540c\u3002<\/li>\n<\/ul>\n
      \u7406\u89e3 Java \u4e2d\u65b9\u6cd5\u91cd\u8f7d\u7684\u89c4\u5219\u5bf9\u4e8e\u7f16\u5199\u53ef\u91cd\u7528\u4e14\u53ef\u6269\u5c55\u7684\u4ee3\u7801\u975e\u5e38\u91cd\u8981\u3002<\/p>\n
      \u7406\u8bba\u8981\u638c\u63e1\uff0c\u5b9e\u64cd\u4e0d\u80fd\u843d\uff01\u4ee5\u4e0a\u5173\u4e8e\u300aJava \u4e2d\u65b9\u6cd5\u91cd\u8f7d\u7684\u89c4\u5219\u6709\u54ea\u4e9b\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 \u4e2d\u65b9\u6cd5\u91cd\u8f7d\u7684\u89c4\u5219\u6709\u54ea\u4e9b...<\/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-202775","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202775","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=202775"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202775\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202775"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202775"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202775"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}