{"id":55495,"date":"2025-08-13T23:34:39","date_gmt":"2025-08-13T15:34:39","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/55495.html"},"modified":"2025-08-13T23:34:39","modified_gmt":"2025-08-13T15:34:39","slug":"%e8%b6%a3%e5%91%b3java%e5%bd%93-final-%e5%85%b3%e9%94%ae%e5%ad%97%e9%81%87%e4%b8%8a%e5%b0%8f%e5%8c%ba%e8%b6%85%e5%b8%82%ef%bc%9a%e9%82%a3%e4%ba%9b-%e8%af%b4%e4%b8%80%e4%b8%8d%e4%ba%8c","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/55495.html","title":{"rendered":"\u8da3\u5473JAVA:\u5f53 final \u5173\u952e\u5b57\u9047\u4e0a\u5c0f\u533a\u8d85\u5e02\uff1a\u90a3\u4e9b \u201c\u8bf4\u4e00\u4e0d\u4e8c\u201c \u7684\u89c4\u77e9"},"content":{"rendered":"<p id=\"main-toc\">\u76ee\u5f55<\/p>\n<p id=\"%E4%B8%80%E3%80%81final%20%E5%8F%98%E9%87%8F%EF%BC%9A%E8%B4%B4%E5%9C%A8%E4%BB%B7%E7%AD%BE%E4%B8%8A%E7%9A%84%E4%BB%B7%E6%A0%BC%20%E2%80%94%E2%80%94%20%E6%94%B9%E4%B8%8D%E4%BA%86%EF%BC%81-toc\" style=\"margin-left:40px\">\u4e00\u3001final \u53d8\u91cf&#xff1a;\u8d34\u5728\u4ef7\u7b7e\u4e0a\u7684\u4ef7\u683c \u2014\u2014 \u6539\u4e0d\u4e86&#xff01;<\/p>\n<p id=\"%E4%BA%8C%E3%80%81final%20%E6%96%B9%E6%B3%95%EF%BC%9A%E7%A5%96%E4%BC%A0%E7%9A%84%E6%94%B6%E9%93%B6%E6%B5%81%E7%A8%8B%20%E2%80%94%E2%80%94%20%E5%8A%A8%E4%B8%8D%E5%BE%97%EF%BC%81-toc\" style=\"margin-left:40px\">\u4e8c\u3001final \u65b9\u6cd5&#xff1a;\u7956\u4f20\u7684\u6536\u94f6\u6d41\u7a0b \u2014\u2014 \u52a8\u4e0d\u5f97&#xff01;<\/p>\n<p id=\"%E4%B8%89%E3%80%81final%20%E7%B1%BB%EF%BC%9A%E7%8B%AC%E9%97%A8%E9%85%8D%E6%96%B9%E7%9A%84%E8%BE%A3%E6%A4%92%E9%85%B1%20%E2%80%94%E2%80%94%20%E6%8A%84%E4%B8%8D%E8%B5%B0%EF%BC%81-toc\" style=\"margin-left:40px\">\u4e09\u3001final \u7c7b&#xff1a;\u72ec\u95e8\u914d\u65b9\u7684\u8fa3\u6912\u9171 \u2014\u2014 \u6284\u4e0d\u8d70&#xff01;<\/p>\n<p id=\"%E5%9B%9B%E3%80%81final%20%E7%9A%84%20%22%E6%AD%BB%E8%A7%84%E7%9F%A9%22%20%E4%B9%9F%E6%9C%89%E7%81%B5%E6%B4%BB%E5%A4%84-toc\" style=\"margin-left:40px\">\u56db\u3001final \u7684 &#034;\u6b7b\u89c4\u77e9&#034; \u4e5f\u6709\u7075\u6d3b\u5904<\/p>\n<hr id=\"hr-toc\" \/>\n<p>\u5c0f\u533a\u8d85\u5e02\u7684\u738b\u8001\u677f\u6700\u8fd1\u5728\u5e97\u91cc\u8d34\u4e86\u4e00\u5806\u544a\u793a&#xff1a;&#034;\u7279\u4ef7\u9e21\u86cb\u6bcf\u4eba\u9650\u8d2d 3 \u65a4&#xff0c;\u6982\u4e0d\u8fd8\u4ef7&#034;\u3001&#034;\u6536\u94f6\u53f0\u5907\u7528\u91d1\u4ec5\u9650\u627e\u96f6&#xff0c;\u4e0d\u51c6\u632a\u7528&#034;\u3002\u5458\u5de5\u5c0f\u674e\u561f\u56d4&#xff1a;&#034;\u8fd9\u89c4\u77e9\u4e5f\u592a\u6b7b\u4e86&#034;&#xff0c;\u738b\u8001\u677f\u773c\u4e00\u77aa&#xff1a;&#034;\u8fd9\u53eb &#039;final&#039;&#xff0c;\u61c2\u4e0d\u61c2&#xff1f;&#034;<\/p>\n<h3 id=\"%E4%B8%80%E3%80%81final%20%E5%8F%98%E9%87%8F%EF%BC%9A%E8%B4%B4%E5%9C%A8%E4%BB%B7%E7%AD%BE%E4%B8%8A%E7%9A%84%E4%BB%B7%E6%A0%BC%20%E2%80%94%E2%80%94%20%E6%94%B9%E4%B8%8D%E4%BA%86%EF%BC%81\">\u4e00\u3001final \u53d8\u91cf&#xff1a;\u8d34\u5728\u4ef7\u7b7e\u4e0a\u7684\u4ef7\u683c \u2014\u2014 \u6539\u4e0d\u4e86&#xff01;<\/h3>\n<p>\u738b\u8001\u677f\u7684\u4ef7\u7b7e\u662f\u51fa\u4e86\u540d\u7684 &#034;\u4e00\u8a00\u4e5d\u9f0e&#034;\u3002\u4e0a\u6b21\u6709\u987e\u5ba2\u60f3\u8ba9\u4ed6\u628a &#034;5.99 \u5143 \/ \u65a4&#034; \u7684\u82f9\u679c\u6539\u6210 &#034;5.5 \u5143&#034;&#xff0c;\u738b\u8001\u677f\u6307\u7740\u4ef7\u7b7e\u8bf4&#xff1a;&#034;\u8fd9\u4ef7\u7b7e\u662f final \u7684&#xff0c;\u6539\u4e0d\u4e86&#xff01;&#034;<\/p>\n<p>\/\/ \u5c31\u50cf\u738b\u8001\u677f\u7684\u4ef7\u7b7e<br \/>\nfinal double APPLE_PRICE &#061; 5.99;<\/p>\n<p>\/\/ \u987e\u5ba2\u60f3\u780d\u4ef7<br \/>\n\/\/ APPLE_PRICE &#061; 5.5; \/\/ \u7f16\u8bd1\u62a5\u9519&#xff1a;\u8fd9\u4ef7\u6539\u4e0d\u4e86&#xff01;<\/p>\n<p>\u4f46\u738b\u8001\u677f\u4e5f\u4e0d\u662f\u5b8c\u5168\u6b7b\u677f\u3002\u65b0\u8fdb\u7684\u9999\u8549\u8fd8\u6ca1\u5b9a\u4ef7&#xff0c;\u4ed6\u4f1a\u5148\u5199\u4e2a &#034;\u5f85\u5b9a\u4ef7&#034;&#xff0c;\u7b49\u6838\u7b97\u5b8c\u6210\u672c\u518d\u586b&#xff1a;<\/p>\n<p>\/\/ \u5148\u58f0\u660e&#xff0c;\u540e\u5b9a\u4ef7&#xff08;\u6784\u9020\u5668\u91cc\u8d4b\u503c&#xff09;<br \/>\nfinal double BANANA_PRICE;<\/p>\n<p>\/\/ \u8fdb\u8d27\u540e\u7b97\u597d\u4ef7\u683c<br \/>\npublic Supermarket() {<br \/>\n    BANANA_PRICE &#061; 3.99; \/\/ \u8fd9\u6b21\u5b9a\u4e86\u5c31\u4e0d\u80fd\u6539\u4e86<br \/>\n}<\/p>\n<p>\u6bb5\u5b50\u89e3\u8bfb&#xff1a;final \u53d8\u91cf\u5c31\u50cf\u8d85\u5e02\u91cc\u8d34\u6b7b\u7684\u4ef7\u7b7e&#xff0c;\u4e00\u65e6\u5199\u4e0a\u6570\u5b57&#xff08;\u521d\u59cb\u5316&#xff09;&#xff0c;\u8c01\u6765\u90fd\u6539\u4e0d\u4e86\u3002\u4f46\u53ef\u4ee5\u5148\u8d34\u4e2a\u7a7a\u7b7e&#xff08;\u58f0\u660e\u65f6\u4e0d\u8d4b\u503c&#xff09;&#xff0c;\u7b49\u7b97\u597d\u8d26\u518d\u586b&#xff08;\u6784\u9020\u5668\u6216\u9759\u6001\u4ee3\u7801\u5757\u8d4b\u503c&#xff09;&#xff0c;\u586b\u5b8c\u7167\u6837\u4e0d\u80fd\u6539\u3002<\/p>\n<h3 id=\"%E4%BA%8C%E3%80%81final%20%E6%96%B9%E6%B3%95%EF%BC%9A%E7%A5%96%E4%BC%A0%E7%9A%84%E6%94%B6%E9%93%B6%E6%B5%81%E7%A8%8B%20%E2%80%94%E2%80%94%20%E5%8A%A8%E4%B8%8D%E5%BE%97%EF%BC%81\">\u4e8c\u3001final \u65b9\u6cd5&#xff1a;\u7956\u4f20\u7684\u6536\u94f6\u6d41\u7a0b \u2014\u2014 \u52a8\u4e0d\u5f97&#xff01;<\/h3>\n<p>\u738b\u8001\u677f\u4ed6\u7239\u4f20\u4e0b\u6765\u4e00\u5957\u6536\u94f6\u6d41\u7a0b&#xff1a;&#034;\u5148\u626b\u7801\u3001\u518d\u88c5\u888b\u3001\u6700\u540e\u62a5\u91d1\u989d&#034;&#xff0c;\u8c01\u90fd\u4e0d\u80fd\u6539\u3002\u5c0f\u674e\u60f3\u8bd5\u8bd5 &#034;\u5148\u88c5\u888b\u518d\u626b\u7801&#034;&#xff0c;\u88ab\u738b\u8001\u677f\u4e00\u987f\u9a82&#xff1a;&#034;\u8fd9\u662f final \u65b9\u6cd5&#xff0c;\u52a8\u4e0d\u5f97&#xff01;&#034;<\/p>\n<p>class OldBoss {<br \/>\n    \/\/ \u7956\u4f20\u6536\u94f6\u6d41\u7a0b&#xff08;final\u65b9\u6cd5&#xff09;<br \/>\n    final void checkout() {<br \/>\n        System.out.println(&#034;1. \u626b\u7801 2. \u88c5\u888b 3. \u62a5\u91d1\u989d&#034;);<br \/>\n    }<br \/>\n}<\/p>\n<p>class YoungBoss extends OldBoss {<br \/>\n    \/\/ \u60f3\u6539\u7956\u4f20\u89c4\u77e9&#xff1f;<br \/>\n    \/\/ &#064;Override<br \/>\n    \/\/ void checkout() { \/\/ \u7f16\u8bd1\u62a5\u9519&#xff1a;\u8fd9\u6d41\u7a0b\u6539\u4e0d\u4e86&#xff01;<br \/>\n    \/\/     System.out.println(&#034;1. \u88c5\u888b 2. \u626b\u7801&#8230;&#034;);<br \/>\n    \/\/ }<br \/>\n}<\/p>\n<p>\u6bb5\u5b50\u89e3\u8bfb&#xff1a;final \u65b9\u6cd5\u5c31\u50cf\u8001\u7956\u5b97\u5b9a\u4e0b\u7684\u89c4\u77e9&#xff0c;\u5b50\u7c7b&#xff08;\u540e\u4ee3&#xff09;\u53ea\u80fd\u7167\u7740\u505a&#xff0c;\u4e0d\u80fd\u778e\u6539\u3002\u738b\u8001\u677f\u8bf4\u8fd9\u662f\u4e3a\u4e86 &#034;\u4fdd\u8bc1\u8d28\u91cf&#034;\u2014\u2014 \u4e07\u4e00\u6539\u4e71\u4e86\u6d41\u7a0b&#xff0c;\u591a\u6536\u94b1\u5c11\u6536\u94b1\u90fd\u9ebb\u70e6\u3002<\/p>\n<h3 id=\"%E4%B8%89%E3%80%81final%20%E7%B1%BB%EF%BC%9A%E7%8B%AC%E9%97%A8%E9%85%8D%E6%96%B9%E7%9A%84%E8%BE%A3%E6%A4%92%E9%85%B1%20%E2%80%94%E2%80%94%20%E6%8A%84%E4%B8%8D%E8%B5%B0%EF%BC%81\">\u4e09\u3001final \u7c7b&#xff1a;\u72ec\u95e8\u914d\u65b9\u7684\u8fa3\u6912\u9171 \u2014\u2014 \u6284\u4e0d\u8d70&#xff01;<\/h3>\n<p>\u738b\u8001\u677f\u7684\u79d8\u5236\u8fa3\u6912\u9171\u706b\u4e86&#xff0c;\u6709\u4eba\u60f3\u62dc\u5e08\u5b66\u827a\u5f00\u5206\u5e97&#xff0c;\u738b\u8001\u677f\u6446\u6446\u624b&#xff1a;&#034;\u8fd9\u914d\u65b9\u662f final \u7c7b&#xff0c;\u4e0d\u5916\u4f20&#xff01;&#034;<\/p>\n<\/p>\n<p>\/\/ \u79d8\u5236\u8fa3\u6912\u9171\u914d\u65b9&#xff08;final\u7c7b&#xff09;<br \/>\nfinal class SecretChiliSauce {<br \/>\n    void make() {<br \/>\n        System.out.println(&#034;\u72ec\u5bb6\u914d\u65b9&#xff1a;\u8fa3\u6912&#043;\u516b\u89d2&#043;\u795e\u79d8\u8c03\u6599&#034;);<br \/>\n    }<br \/>\n}<\/p>\n<p>\/\/ \u60f3\u5c71\u5be8&#xff1f;\u6ca1\u95e8&#xff01;<br \/>\n\/\/ class CopycatSauce extends SecretChiliSauce { \/\/ \u7f16\u8bd1\u62a5\u9519&#xff1a;\u6284\u4e0d\u4e86&#xff01;<br \/>\n\/\/ }<\/p>\n<p>\u6bb5\u5b50\u89e3\u8bfb&#xff1a;final \u7c7b\u5c31\u50cf\u72ec\u95e8\u79d8\u65b9&#xff0c;\u4e0d\u51c6\u522b\u4eba\u7ee7\u627f&#xff08;\u5c71\u5be8&#xff09;\u3002Java \u91cc\u7684 String \u7c7b\u5c31\u662f final \u7684&#xff0c;\u4fdd\u8bc1\u4e86\u5b57\u7b26\u4e32\u4e00\u65e6\u521b\u5efa\u5c31\u4e0d\u80fd\u88ab\u4fee\u6539&#xff0c;\u4e0d\u7136\u4f60\u53d1\u7684\u6d88\u606f\u88ab\u4eba\u4e2d\u9014\u6539\u4e86\u53ef\u5c31\u9ebb\u70e6\u4e86\u3002<\/p>\n<h3 id=\"%E5%9B%9B%E3%80%81final%20%E7%9A%84%20%22%E6%AD%BB%E8%A7%84%E7%9F%A9%22%20%E4%B9%9F%E6%9C%89%E7%81%B5%E6%B4%BB%E5%A4%84\">\u56db\u3001final \u7684 &#034;\u6b7b\u89c4\u77e9&#034; \u4e5f\u6709\u7075\u6d3b\u5904<\/h3>\n<p>\u522b\u770b\u738b\u8001\u677f\u89c4\u77e9\u591a&#xff0c;\u4ed6\u4e5f\u61c2\u53d8\u901a&#xff1a;<\/p>\n<\/p>\n<li>\n<p>final \u6570\u7ec4&#xff1a;\u4ed3\u5e93\u91cc\u7684 &#034;\u5e94\u6025\u7269\u8d44\u7bb1&#034; \u662f final \u7684&#xff08;\u4e0d\u80fd\u6362\u7bb1\u5b50&#xff09;&#xff0c;\u4f46\u91cc\u9762\u7684\u4e1c\u897f\u80fd\u6362&#xff08;\u6570\u7ec4\u5185\u5bb9\u53ef\u6539&#xff09;<\/p>\n<p> final String[] EMERGENCY_BOX &#061; {&#034;\u521b\u53ef\u8d34&#034;, &#034;\u7898\u4f0f&#034;};<br \/>\nEMERGENCY_BOX[0] &#061; &#034;\u7ef7\u5e26&#034;; \/\/ \u53ef\u4ee5\u6362\u91cc\u9762\u7684\u4e1c\u897f<br \/>\n\/\/ EMERGENCY_BOX &#061; new String[]{&#034;&#8230;&#034;}; \/\/ \u4e0d\u80fd\u6362\u7bb1\u5b50\u672c\u8eab<\/p>\n<\/li>\n<li>\n<p>final \u53c2\u6570&#xff1a;\u987e\u5ba2\u8bf4 &#034;\u4e70 3 \u65a4\u82f9\u679c&#034;&#xff0c;\u79f0\u91cd\u65f6\u4e0d\u80fd\u5077\u5077\u6539\u6210 5 \u65a4&#xff08;\u65b9\u6cd5\u53c2\u6570\u52a0 final&#xff0c;\u9632\u6b62\u88ab\u7be1\u6539&#xff09;<\/p>\n<\/p>\n<p> void sellApple(final int weight) {<br \/>\n    \/\/ weight &#061; 5; \/\/ \u7f16\u8bd1\u62a5\u9519&#xff1a;\u4e0d\u80fd\u591a\u5356&#xff01;<br \/>\n    System.out.println(&#034;\u5356\u51fa&#034; &#043; 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