{"id":203234,"date":"2025-05-22T08:30:25","date_gmt":"2025-05-22T00:30:25","guid":{"rendered":"https:\/\/server.hk\/cnblog\/203234\/"},"modified":"2025-05-22T08:30:25","modified_gmt":"2025-05-22T00:30:25","slug":"%e4%bd%bf%e7%94%a8-java-%e5%af%86%e5%b0%81%e7%b1%bb%e7%9a%84%e9%ab%98%e7%ba%a7%e7%b1%bb%e8%ae%be%e8%ae%a1","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/203234\/","title":{"rendered":"\u4f7f\u7528 Java \u5bc6\u5c01\u7c7b\u7684\u9ad8\u7ea7\u7c7b\u8bbe\u8ba1"},"content":{"rendered":"

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

\u4f7f\u7528 Java \u5bc6\u5c01\u7c7b\u7684\u9ad8\u7ea7\u7c7b\u8bbe\u8ba1<\/h1>\n

<\/i>\u6536\u85cf<\/span> <\/p>\n

\u4ece\u73b0\u5728\u5f00\u59cb\uff0c\u6211\u4eec\u8981\u52aa\u529b\u5b66\u4e60\u5566\uff01\u4eca\u5929\u6211\u7ed9\u5927\u5bb6\u5e26\u6765\u300a\u4f7f\u7528 Java \u5bc6\u5c01\u7c7b\u7684\u9ad8\u7ea7\u7c7b\u8bbe\u8ba1\u300b<\/span>\uff0c\u611f\u5174\u8da3\u7684\u670b\u53cb\u8bf7\u7ee7\u7eed\u770b\u4e0b\u53bb\u5427\uff01\u4e0b\u6587\u4e2d\u7684\u5185\u5bb9\u6211\u4eec\u4e3b\u8981\u4f1a\u6d89\u53ca\u5230<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u5728\u9605\u8bfb\u672c\u6587\u8fc7\u7a0b\u4e2d\u6709\u9047\u5230\u4e0d\u6e05\u695a\u7684\u5730\u65b9\uff0c\u6b22\u8fce\u7559\u8a00\u5440\uff01\u6211\u4eec\u4e00\u8d77\u8ba8\u8bba\uff0c\u4e00\u8d77\u5b66\u4e60\uff01<\/p>\n

<\/p>\n

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

\u5728\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u4e2d\uff0c\u7c7b\u8bbe\u8ba1\u5728\u521b\u5efa\u5065\u58ee\u4e14\u53ef\u7ef4\u62a4\u7684\u4ee3\u7801\u65b9\u9762\u8d77\u7740\u81f3\u5173\u91cd\u8981\u7684\u4f5c\u7528\u3002\u968f\u7740 java 15 \u7684\u53d1\u5e03\uff0c\u5f15\u5165\u4e86\u4e00\u9879\u79f0\u4e3a\u5bc6\u5c01\u7c7b\u7684\u65b0\u529f\u80fd\uff0c\u4e3a\u7c7b\u8bbe\u8ba1\u6dfb\u52a0\u4e86\u989d\u5916\u7684\u63a7\u5236\u548c\u5b89\u5168\u5c42\u3002\u5bc6\u5c01\u7c7b\u5141\u8bb8\u5f00\u53d1\u4eba\u5458\u9650\u5236\u7c7b\u5c42\u6b21\u7ed3\u6784\uff0c\u9632\u6b62\u5916\u90e8\u7c7b\u6269\u5c55\u6216\u5b9e\u73b0\u5b83\u4eec\u3002\u5728\u672c\u6587\u4e2d\uff0c\u6211\u4eec\u5c06\u8ba8\u8bba\u5bc6\u5c01\u7c7b\u7684\u6982\u5ff5\u3001\u5b83\u4eec\u7684\u597d\u5904\u4ee5\u53ca\u5982\u4f55\u5728 java \u4e2d\u5b9e\u73b0\u5b83\u4eec\u3002<\/p>\n

\u4ec0\u4e48\u662f\u5bc6\u5c01\u7c7b\uff1f<\/strong><\/p>\n

\u5bc6\u5c01\u7c7b\u662fjava 15\u4e2d\u5f15\u5165\u7684\u4e00\u79cd\u65b0\u7c7b\u578b\u7684\u7c7b\uff0c\u5b83\u9650\u5236\u5176\u5b50\u7c7b\u7684\u7ee7\u627f\u548c\u5b9e\u73b0\u3002\u5b83\u53ef\u4ee5\u88ab\u8ba4\u4e3a\u662f\u4e00\u4e2a\u5bc6\u5c01\u7684\u5bb9\u5668\uff0c\u53ea\u5141\u8bb8\u7279\u5b9a\u7684\u7c7b\u6269\u5c55\u6216\u5b9e\u73b0\u5b83\u3002\u4e00\u65e6\u4e00\u4e2a\u7c7b\u88ab\u58f0\u660e\u4e3a\u5bc6\u5c01\u7684\uff0c\u5b83\u5c31\u9ed8\u8ba4\u6210\u4e3a\u6700\u7ec8\u7684\uff0c\u4efb\u4f55\u901a\u8fc7\u5916\u90e8\u7c7b\u6269\u5c55\u6216\u5b9e\u73b0\u5b83\u7684\u5c1d\u8bd5\u90fd\u4f1a\u5bfc\u81f4\u7f16\u8bd1\u9519\u8bef\u3002<\/p>\n

\u4f7f\u7528\u5bc6\u5c01\u7c7b\u7684\u4f18\u70b9<\/strong><\/p>\n

1\u3002\u589e\u5f3a\u7684\u5b89\u5168\u6027\uff1a<\/strong> \u5bc6\u5c01\u7c7b\u901a\u8fc7\u9650\u5236\u5176\u5b50\u7c7b\u7684\u7ee7\u627f\u548c\u5b9e\u73b0\u6765\u63d0\u4f9b\u989d\u5916\u7684\u5b89\u5168\u5c42\u3002\u8fd9\u53ef\u4ee5\u9632\u6b62\u5bf9\u6838\u5fc3\u7c7b\u8fdb\u884c\u672a\u7ecf\u6388\u6743\u7684\u4fee\u6539\uff0c\u5e76\u786e\u4fdd\u53ea\u6709\u53d7\u4fe1\u4efb\u7684\u5b50\u7c7b\u624d\u80fd\u8bbf\u95ee\u548c\u4fee\u6539\u5bc6\u5c01\u7c7b\u3002<\/p>\n

2\u3002\u66f4\u597d\u5730\u63a7\u5236\u7c7b\u5c42\u6b21\u7ed3\u6784\uff1a<\/strong> \u901a\u8fc7\u5bc6\u5c01\u7c7b\uff0c\u5f00\u53d1\u4eba\u5458\u53ef\u4ee5\u66f4\u597d\u5730\u63a7\u5236\u7c7b\u5c42\u6b21\u7ed3\u6784\u3002\u901a\u8fc7\u663e\u5f0f\u5b9a\u4e49\u5141\u8bb8\u7684\u5b50\u7c7b\uff0c\u6211\u4eec\u53ef\u4ee5\u786e\u4fdd\u53ea\u6709\u76f8\u5173\u4e14\u8bbe\u8ba1\u6b63\u786e\u7684\u7c7b\u624d\u80fd\u6269\u5c55\u6216\u5b9e\u73b0\u5bc6\u5c01\u7c7b\uff0c\u4ece\u800c\u5f62\u6210\u66f4\u6613\u4e8e\u7ef4\u62a4\u7684\u4ee3\u7801\u5e93\u3002<\/p>\n

3\u3002\u63d0\u9ad8\u4ee3\u7801\u7075\u6d3b\u6027\uff1a<\/strong>\u901a\u8fc7\u9650\u5236\u53ef\u4ee5\u6269\u5c55\u6216\u5b9e\u73b0\u5bc6\u5c01\u7c7b\u7684\u5b50\u7c7b\uff0c\u6211\u4eec\u53ef\u4ee5\u8fdb\u884c\u5fc5\u8981\u7684\u66f4\u6539\u6216\u91cd\u6784\uff0c\u800c\u4e0d\u5fc5\u62c5\u5fc3\u7834\u574f\u4efb\u4f55\u5916\u90e8\u4ee3\u7801\u3002\u8fd9\u5728\u4f7f\u7528\u5bc6\u5c01\u7c7b\u65f6\u63d0\u4f9b\u4e86\u7075\u6d3b\u6027\uff0c\u5e76\u786e\u4fdd\u4ee3\u7801\u5e93\u4fdd\u6301\u7a33\u5b9a\u548c\u53ef\u7ef4\u62a4\u3002<\/p>\n

\u5bc6\u5c01\u7c7b\u7684\u5b9e\u65bd<\/strong><\/p>\n

\u8981\u5c06\u7c7b\u58f0\u660e\u4e3a\u5bc6\u5c01\u7684\uff0c\u6211\u4eec\u53ef\u4ee5\u5728\u7c7b\u58f0\u660e\u4e2d\u4f7f\u7528\u201csealed\u201d\u5173\u952e\u5b57\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n

\/\/sealed class declaration\npublic sealed class triangle permits equilateraltriangle, rightangletriangle {\n\n    \/\/class body\n}\n<\/pre>\n
\u8fd9\u91cc\uff0c’permits’\u5173\u952e\u5b57\u7528\u4e8e\u6307\u5b9a\u5141\u8bb8\u6269\u5c55\u5bc6\u5c01\u7c7b\u7684\u5b50\u7c7b\u3002\u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff0c\u53ea\u6709\u7c7b ‘equisidetriangle’ \u548c ‘rightangletriangle’ \u53ef\u4ee5\u6269\u5c55 ‘triangle’ \u7c7b\u3002<\/p>\n
\u73b0\u5728\uff0c\u8ba9\u6211\u4eec\u521b\u5efa\u53ef\u4ee5\u6269\u5c55\u201ctriangle\u201d\u7c7b\u7684\u5b50\u7c7b\u3002<\/p>\n
\/\/example of subclass that extends sealed class\npublic final class equilateraltriangle extends triangle {\n    \/\/class body\n}\n\n\/\/example of subclass that extends sealed class\npublic non-sealed class rightangletriangle extends triangle {\n    \/\/class body\n}\n<\/pre>\n
\u8bf7\u6ce8\u610f\uff0c\u201cequisidetriangle\u201d\u7c7b\u88ab\u58f0\u660e\u4e3a\u201cfinal\u201d\uff0c\u56e0\u4e3a\u5b83\u662f\u7ee7\u627f\u5c42\u6b21\u7ed3\u6784\u4e2d\u7684\u6700\u540e\u4e00\u4e2a\u5b50\u7c7b\uff0c\u800c\u201crightangletriangle\u201d\u7c7b\u88ab\u58f0\u660e\u4e3a\u201cnon-sealed\u201d\uff0c\u56e0\u4e3a\u5b83\u5141\u8bb8\u5176\u4ed6\u5b50\u7c7b\u6269\u5c55\u5b83\u3002 <\/p>\n
\u63a5\u4e0b\u6765\uff0c\u8ba9\u6211\u4eec\u770b\u4e00\u4e2a\u5b9e\u73b0\u5bc6\u5c01\u63a5\u53e3\u7684\u793a\u4f8b\u3002\u53ef\u4ee5\u4f7f\u7528\u4e0e\u5bc6\u5c01\u7c7b\u76f8\u540c\u7684\u8bed\u6cd5\u5c06\u63a5\u53e3\u58f0\u660e\u4e3a\u5bc6\u5c01\u3002<\/p>\n
\/\/sealed interface declaration\npublic sealed interface shape permits rectangle, circle {\n\n    \/\/interface body\n    public double getarea();\n}\n<\/pre>\n
\u8fd9\u91cc\uff0c\u201cpermits\u201d\u5173\u952e\u5b57\u7528\u4e8e\u6307\u5b9a\u5141\u8bb8\u5b9e\u73b0\u5bc6\u5c01\u63a5\u53e3\u7684\u7c7b\u3002\u5728\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\uff0c\u53ea\u6709\u7c7b ‘rectangle’ \u548c ‘circle’ \u53ef\u4ee5\u5b9e\u73b0 ‘shape’ \u63a5\u53e3\u3002<\/p>\n
\/\/Example of Class Implementing Sealed Interface\npublic final class Rectangle implements Shape {\n\n    \/\/Interface method implementation\n    public double getArea() {\n        \/\/Logic to calculate area of rectangle\n    }\n}\n\n\/\/Example of Class Implementing Sealed Interface\npublic non-sealed class Circle implements Shape {\n\n    \/\/Interface method implementation\n    public double getArea() {\n        \/\/Logic to calculate area of circle\n    }\n}\n<\/pre>\n
\u8bf7\u6ce8\u610f\uff0c\u201c\u77e9\u5f62\u201d\u7c7b\u88ab\u58f0\u660e\u4e3a\u201c\u6700\u7ec8\u201d\u7c7b\uff0c\u56e0\u4e3a\u5b83\u662f\u6700\u540e\u4e00\u4e2a\u5b9e\u73b0\u201c\u5f62\u72b6\u201d\u63a5\u53e3\u7684\u7c7b\uff0c\u800c\u201c\u5706\u5f62\u201d\u7c7b\u88ab\u58f0\u660e\u4e3a\u201c\u975e\u5bc6\u5c01\u201d\u7c7b\uff0c\u56e0\u4e3a\u5b83\u5141\u8bb8\u5176\u4ed6\u7c7b\u5b9e\u65bd\u5b83\u3002<\/p>\n
\u5bc6\u5c01\u7c7b\u548c\u63a5\u53e3\u7684\u7ee7\u627f\u89c4\u5219<\/strong><\/p>\n
    \n
  1. \u5bc6\u5c01\u7c7b\u5fc5\u987b\u663e\u5f0f\u5141\u8bb8\u53ef\u4ee5\u6269\u5c55\u5b83\u7684\u5b50\u7c7b\u3002<\/li>\n
  2. \u6240\u6709\u5141\u8bb8\u7684\u5b50\u7c7b\u5fc5\u987b\u662f\u5bc6\u5c01\u7c7b\u7684\u76f4\u63a5\u5b50\u7c7b\u3002\u8fd9\u610f\u5473\u7740\u6211\u4eec\u4e0d\u80fd\u6269\u5c55\u4e00\u4e2a\u4e0d\u5141\u8bb8\u7684\u5b50\u7c7b\u6765\u521b\u5efa\u5bc6\u5c01\u7c7b\u7684\u95f4\u63a5\u5b50\u7c7b\u3002<\/li>\n
  3. \u5bc6\u5c01\u63a5\u53e3\u5fc5\u987b\u663e\u5f0f\u5141\u8bb8\u53ef\u4ee5\u5b9e\u73b0\u5b83\u7684\u7c7b\u3002<\/li>\n
  4. \u6240\u6709\u5141\u8bb8\u7684\u7c7b\u5fc5\u987b\u5b9e\u73b0\u6240\u6709\u63a5\u53e3\u65b9\u6cd5\u3002\u8fd9\u610f\u5473\u7740\u6211\u4eec\u65e0\u6cd5\u521b\u5efa\u90e8\u5206\u5b9e\u73b0\u5bc6\u5c01\u63a5\u53e3\u7684\u7c7b\u3002<\/li>\n<\/ol>\n
    \u7ed3\u8bba<\/strong><\/p>\n
    \u5bc6\u5c01\u7c7b\u662f java \u7684\u5f3a\u5927\u8865\u5145\uff0c\u53ef\u4ee5\u6781\u5927\u5730\u589e\u5f3a\u7c7b\u8bbe\u8ba1\u5e76\u4f7f\u4ee3\u7801\u5e93\u66f4\u52a0\u5b89\u5168\u548c\u53ef\u7ef4\u62a4\u3002\u901a\u8fc7\u9650\u5236\u7c7b\u548c\u63a5\u53e3\u7684\u5c42\u6b21\u7ed3\u6784\uff0c\u5bc6\u5c01\u7c7b\u5728\u8bbe\u8ba1\u7c7b\u65f6\u63d0\u4f9b\u4e86\u989d\u5916\u7684\u63a7\u5236\u5c42\u548c\u7075\u6d3b\u6027\u3002\u501f\u52a9\u8fd9\u4e00\u65b0\u529f\u80fd\uff0c\u5f00\u53d1\u4eba\u5458\u53ef\u4ee5\u786e\u4fdd\u53ea\u6709\u53d7\u4fe1\u4efb\u7684\u5b50\u7c7b\u6216\u5b9e\u73b0\u7c7b\u624d\u80fd\u8bbf\u95ee\u548c\u4fee\u6539\u5bc6\u5c01\u7c7b\uff0c\u4ece\u800c\u5f62\u6210\u66f4\u7a33\u5b9a\u3001\u66f4\u5065\u58ee\u7684\u4ee3\u7801\u5e93\u3002\u901a\u8fc7\u83b7\u5f97\u6700\u65b0\u7684 java \u8ba4\u8bc1\u6765\u589e\u5f3a\u60a8\u7684 java \u6280\u80fd\u3002 <\/p>\n
    \u5230\u8fd9\u91cc\uff0c\u6211\u4eec\u4e5f\u5c31\u8bb2\u5b8c\u4e86\u300a\u4f7f\u7528 Java \u5bc6\u5c01\u7c7b\u7684\u9ad8\u7ea7\u7c7b\u8bbe\u8ba1\u300b\u7684\u5185\u5bb9\u4e86\u3002\u4e2a\u4eba\u8ba4\u4e3a\uff0c\u57fa\u7840\u77e5\u8bc6\u7684\u5b66\u4e60\u548c\u5de9\u56fa\uff0c\u662f\u4e3a\u4e86\u66f4\u597d\u7684\u5c06\u5176\u8fd0\u7528\u5230\u9879\u76ee\u4e2d\uff0c\u6b22\u8fce\u5173\u6ce8\u516c\u4f17\u53f7\uff0c\u5e26\u4f60\u4e86\u89e3\u66f4\u591a\u5173\u4e8e\u7684\u77e5\u8bc6\u70b9\uff01<\/p>\n
          \u7248\u672c\u58f0\u660e \u672c\u6587\u8f6c\u8f7d\u4e8e\uff1adev.to \u5982\u6709\u4fb5\u72af\uff0c\u8bf7\u8054\u7cfb\u5220\u9664<\/p>\n","protected":false},"excerpt":{"rendered":"
    \u4f7f\u7528 Java \u5bc6\u5c01\u7c7b\u7684\u9ad8\u7ea7\u7c7b\u8bbe...<\/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-203234","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203234","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=203234"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203234\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=203234"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=203234"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=203234"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}