{"id":97,"date":"2015-03-30T11:50:48","date_gmt":"2015-03-30T03:50:48","guid":{"rendered":"https:\/\/ai.zhousir.top\/?p=97"},"modified":"2026-08-18T12:09:26","modified_gmt":"2026-08-18T04:09:26","slug":"java-final%e5%85%b3%e9%94%ae%e5%ad%97%ef%bc%9a%e9%98%bb%e6%ad%a2%e7%bb%a7%e6%89%bf%e5%92%8c%e5%a4%9a%e6%80%81","status":"publish","type":"post","link":"https:\/\/ai.zhousir.top\/?p=97","title":{"rendered":"Java final\u5173\u952e\u5b57\uff1a\u963b\u6b62\u7ee7\u627f\u548c\u591a\u6001"},"content":{"rendered":"
\n

\u58f0\u660e\u7c7b\u3001\u53d8\u91cf\u548c\u65b9\u6cd5\u65f6\u53ef\u4ee5\u7528 final<\/code> \u4fee\u9970\uff0c\u8868\u793a\u7ec8\u6001<\/strong>\uff1a\u8fd9\u4e2a\u4e1c\u897f\u5b9a\u4e0b\u6765\u4ee5\u540e\u5c31\u4e0d\u80fd\u518d\u6539\u7ee7\u627f\u5173\u7cfb\u3001\u4e0d\u80fd\u518d\u88ab\u8986\u76d6\u3001\u4e0d\u80fd\u518d\u88ab\u91cd\u65b0\u8d4b\u503c\u3002<\/p>\n

\u5177\u4f53\u89c4\u5b9a\uff1afinal \u7c7b\u4e0d\u80fd\u88ab\u7ee7\u627f\uff1bfinal \u65b9\u6cd5\u4e0d\u80fd\u88ab\u5b50\u7c7b\u91cd\u5199\uff1bfinal \u53d8\u91cf\uff08\u6210\u5458\u6216\u5c40\u90e8\uff09\u53ea\u80fd\u8d4b\u503c\u4e00\u6b21\uff0c\u6210\u4e3a\u5e38\u91cf\u3002<\/p>\n

<\/p>\n\n\n\n\n\n\n\n\n
\u4fee\u9970\u5bf9\u8c61<\/th>\n\u6548\u679c<\/th>\n\u8865\u5145<\/th>\n<\/tr>\n<\/thead>\n
\u7c7b<\/td>\n\u4e0d\u80fd\u518d\u6d3e\u751f\u5b50\u7c7b<\/td>\n\u65b9\u6cd5\u9690\u5f0f final\uff1b\u5b57\u6bb5\u4e0d\u4f1a\u56e0\u6b64\u53d8\u6210\u5e38\u91cf<\/td>\n<\/tr>\n
\u65b9\u6cd5<\/td>\n\u4e0d\u80fd\u88ab\u8986\u76d6\uff0c\u9759\u6001\u7ed1\u5b9a<\/td>\nprivate \/ static \u65b9\u6cd5\u672c\u8eab\u5c31\u4e0d\u80fd\u88ab\u8986\u76d6<\/td>\n<\/tr>\n
\u57fa\u672c\u7c7b\u578b\u53d8\u91cf<\/td>\n\u53ea\u80fd\u8d4b\u503c\u4e00\u6b21<\/td>\n\u5e38\u91cf\u540d\u4e60\u60ef\u5168\u5927\u5199<\/td>\n<\/tr>\n
\u5f15\u7528\u7c7b\u578b\u53d8\u91cf<\/td>\n\u5f15\u7528\u4e0d\u80fd\u518d\u6307\u5411\u522b\u7684\u5bf9\u8c61<\/td>\n\u5bf9\u8c61\u5185\u90e8\u72b6\u6001\u4ecd\u53ef\u6539<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u4e00\u3001final \u53d8\u91cf<\/h2>\n

final \u4e00\u822c\u7528\u6765\u4fdd\u62a4\u4e0d\u8be5\u88ab\u6539\u6389\u7684\u901a\u7528\u529f\u80fd\u6216\u53d6\u503c\uff0c\u4f8b\u5982\u4e09\u89d2\u51fd\u6570\u3001\u5e42\u8fd0\u7b97\uff0c\u4ee5\u53ca\u6570\u5b66\u5e38\u91cf Math.PI<\/code>\u3001Math.E<\/code>\u3002java.lang.Math<\/code> \u672c\u8eab\u4e5f\u662f final \u7c7b\uff0c\u9632\u6b62\u88ab\u7ee7\u627f\u540e\u7be1\u6539\u8fd9\u4e9b\u5b9e\u73b0\u3002<\/p>\n

\u6210\u5458\u53d8\u91cf\u53ef\u4ee5\u5728\u58f0\u660e\u65f6\u8d4b\u503c\uff1b\u82e5\u58f0\u660e\u65f6\u6ca1\u8d4b\u503c\uff08\u7a7a\u767d final\uff09\uff0c\u5b9e\u4f8b\u5b57\u6bb5\u5fc5\u987b\u5728\u6bcf\u4e2a\u6784\u9020\u65b9\u6cd5\u91cc\u663e\u5f0f\u8d4b\u4e00\u6b21\uff08\u4e5f\u53ef\u4ee5\u5728\u5b9e\u4f8b\u521d\u59cb\u5316\u5757\u91cc\uff09\uff0c\u9759\u6001 final \u5219\u5728\u9759\u6001\u5757\u91cc\u8d4b\u3002\u5c40\u90e8 final \u53ef\u4ee5\u5148\u58f0\u660e\u540e\u4e00\u6b21\u6027\u8d4b\u503c\u3002\u518d\u8d4b\u503c\u4f1a\u7f16\u8bd1\u5931\u8d25\u3002<\/p>\n

public final int MAX_ARRAY_SIZE = 25; \/\/ \u5e38\u91cf\u540d\u4e00\u822c\u5927\u5199<\/code><\/pre>\n
public final class Demo {\n    public static final int TOTAL_NUMBER = 5;\n    public int id;\n    public Demo() {\n        \/\/ \u975e\u6cd5\uff1a++TOTAL_NUMBER \u76f8\u5f53\u4e8e TOTAL_NUMBER = TOTAL_NUMBER + 1\n        \/\/ id = ++TOTAL_NUMBER;\n        id = TOTAL_NUMBER;\n    }\n    public static void main(String[] args) {\n        final Demo t = new Demo();\n        final int i = 10;\n        final int j;\n        j = 20;\n        \/\/ j = 30;  \/\/ \u975e\u6cd5\uff0c\u5bf9 final \u53d8\u91cf\u4e8c\u6b21\u8d4b\u503c\n        \/\/ t = new Demo();  \/\/ \u975e\u6cd5\uff0cfinal \u5f15\u7528\u4e0d\u80fd\u518d\u6307\u5411\u522b\u7684\u5bf9\u8c61\n        t.id = 8;           \/\/ \u5408\u6cd5\uff0c\u6539\u7684\u662f\u5bf9\u8c61\u5185\u5bb9\uff0c\u4e0d\u662f\u5f15\u7528\u672c\u8eab\n    }\n}<\/code><\/pre>\n
\u5f15\u7528\u88ab\u6807\u6210 final\uff0c\u53ea\u9501\u4f4f\u201c\u6307\u5411\u8c01\u201d\uff0c\u4e0d\u9501\u4f4f\u5bf9\u8c61\u91cc\u9762\u7684\u5b57\u6bb5\u3002\u5b50\u7c7b\u53ef\u4ee5\u7ee7\u627f\u53ef\u89c1\u7684 final \u5b57\u6bb5\u5e76\u8bfb\u53d6\uff0c\u4f46\u4e0d\u80fd\u8986\u76d6\u6216\u91cd\u65b0\u8d4b\u503c\u3002<\/p>\n
\u4e8c\u3001final \u7c7b<\/h2>\n
final<\/code> \u653e\u5728 class<\/code> \u524d\u9762\uff0c\u963b\u6b62\u518d\u6d3e\u751f\u3002\u4f8b\u5982 java.lang.String<\/code> \u5c31\u662f final \u7c7b\uff1a\u62ff\u5230\u4e00\u4e2a\u5b57\u7b26\u4e32\u5f15\u7528\uff0c\u5fc5\u987b\u5c31\u662f String \u672c\u8eab\uff0c\u800c\u4e0d\u80fd\u662f\u67d0\u4e2a\u6076\u610f\u5b50\u7c7b\u4f2a\u88c5\u51fa\u6765\u7684\u201c\u5b57\u7b26\u4e32\u201d\u3002\u7c7b\u4e00\u65e6\u662f final\uff0c\u5176\u4e2d\u65b9\u6cd5\u4e5f\u9690\u5f0f\u6309 final \u5904\u7406\uff0c\u53d8\u91cf\u4e0d\u4f1a\u3002<\/p>\n
\u4e09\u3001final \u65b9\u6cd5\u4e0e\u591a\u6001<\/h2>\n
final \u65b9\u6cd5\u4e0d\u80fd\u88ab\u8986\u76d6\uff0c\u5c5e\u4e8e\u9759\u6001\u7ed1\u5b9a\uff0c\u8fd0\u884c\u65f6\u4e0d\u5fc5\u518d\u67e5\u65b9\u6cd5\u8868\u3002\u88ab static<\/code> \u6216 private<\/code> \u4fee\u9970\u7684\u65b9\u6cd5\u672c\u6765\u5c31\u4e0d\u80fd\u53c2\u4e0e\u591a\u6001\u8986\u76d6\uff0c\u52a8\u6001\u7ed1\u5b9a\u6ca1\u6709\u610f\u4e49\u3002<\/p>\n
\u6709\u4eba\u4e3b\u5f20\u201c\u9664\u975e\u660e\u786e\u8981\u591a\u6001\uff0c\u5426\u5219\u65b9\u6cd5\u5168\u5199\u6210 final\u201d\u3002\u8fd9\u504f\u6fc0\u4e86\uff1aJVM \u7684\u5373\u65f6\u7f16\u8bd1\u5668\u80fd\u6839\u636e\u8fd0\u884c\u65f6\u7ee7\u627f\u5173\u7cfb\u505a\u4f18\u5316\u3002\u65b9\u6cd5\u5f88\u77ed\u4e14\u6ca1\u6709\u88ab\u8986\u76d6\u65f6\uff0c\u7f16\u8bd1\u5668\u53ef\u4ee5\u5185\u8054<\/strong>\uff08inlining\uff09\uff0c\u4f8b\u5982\u628a e.getName()<\/code> \u66ff\u6362\u6210\u76f4\u63a5\u8bfb e.name<\/code>\u3002CPU \u5904\u7406\u8c03\u7528\u65f6\u7684\u5206\u652f\u4f1a\u6253\u4e71\u9884\u53d6\uff0c\u5185\u8054\u80fd\u907f\u5f00\u8fd9\u4e00\u70b9\u3002\u4e00\u65e6 getName()<\/code> \u5728\u522b\u7684\u7c7b\u91cc\u88ab\u8986\u76d6\uff0c\u7f16\u8bd1\u5668\u5c31\u65e0\u6cd5\u9884\u77e5\u8986\u76d6\u4ee3\u7801\u505a\u4ec0\u4e48\uff0c\u4e5f\u5c31\u4e0d\u80fd\u5185\u8054\u3002<\/p>\n
\n
\u4e00\u53e5\u8bdd\u603b\u7ed3\uff1afinal \u7c7b\u4e0d\u80fd\u7ee7\u627f\uff0cfinal \u65b9\u6cd5\u4e0d\u80fd\u8986\u76d6\uff0cfinal \u53d8\u91cf\u53ea\u80fd\u8d4b\u4e00\u6b21\u2014\u2014\u5f15\u7528 final \u53ea\u9501\u4f4f\u6307\u5411\uff0c\u4e0d\u9501\u4f4f\u5bf9\u8c61\u5185\u5bb9\u3002<\/strong><\/p>\n<\/blockquote>\n<\/section>\n","protected":false},"excerpt":{"rendered":"
\u58f0\u660e\u7c7b\u3001\u53d8\u91cf\u548c\u65b9\u6cd5\u65f6\u53ef\u4ee5\u7528 final \u4fee\u9970\uff0c\u8868\u793a\u7ec8\u6001\uff1a\u8fd9\u4e2a\u4e1c\u897f\u5b9a\u4e0b\u6765\u4ee5\u540e\u5c31\u4e0d\u80fd\u518d\u6539\u7ee7\u627f\u5173\u7cfb\u3001\u4e0d\u80fd\u518d\u88ab\u8986\u76d6\u3001\u4e0d […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[16],"tags":[33,43,32,31],"_links":{"self":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/97"}],"collection":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=97"}],"version-history":[{"count":2,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/97\/revisions"}],"predecessor-version":[{"id":382,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/97\/revisions\/382"}],"wp:attachment":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=97"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=97"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=97"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}