\u5728 Java \u4e2d\uff0c\u58f0\u660e\u7c7b\u3001\u53d8\u91cf\u548c\u65b9\u6cd5\u65f6\uff0c\u53ef\u4f7f\u7528\u5173\u952e\u5b57 final \u6765\u4fee\u9970\u3002final \u6240\u4fee\u9970\u7684\u6570\u636e\u5177\u6709\u201c\u7ec8\u6001\u201d\u7684\u7279\u5f81\uff0c\u8868\u793a\u201c\u6700\u7ec8\u7684\u201d\u610f\u601d\u3002\u5177\u4f53\u89c4\u5b9a\u5982\u4e0b\uff1a
\nfinal \u4fee\u9970\u7684\u7c7b\u4e0d\u80fd\u88ab\u7ee7\u627f\u3002
\nfinal \u4fee\u9970\u7684\u65b9\u6cd5\u4e0d\u80fd\u88ab\u5b50\u7c7b\u91cd\u5199\u3002
\nfinal \u4fee\u9970\u7684\u53d8\u91cf\uff08\u6210\u5458\u53d8\u91cf\u6216\u5c40\u90e8\u53d8\u91cf\uff09\u5373\u6210\u4e3a\u5e38\u91cf\uff0c\u53ea\u80fd\u8d4b\u503c\u4e00\u6b21\u3002<\/p>\n
\nfinal \u4fee\u9970\u7684\u6210\u5458\u53d8\u91cf\u5fc5\u987b\u5728\u58f0\u660e\u7684\u540c\u65f6\u8d4b\u503c\uff0c\u5982\u679c\u5728\u58f0\u660e\u7684\u65f6\u5019\u6ca1\u6709\u8d4b\u503c\uff0c\u90a3\u4e48\u53ea\u6709 \u4e00\u6b21\u8d4b\u503c\u7684\u673a\u4f1a\uff0c\u800c\u4e14\u53ea\u80fd\u5728\u6784\u9020\u65b9\u6cd5\u4e2d\u663e\u5f0f\u8d4b\u503c\uff0c\u7136\u540e\u624d\u80fd\u4f7f\u7528\u3002
\nfinal \u4fee\u9970\u7684\u5c40\u90e8\u53d8\u91cf\u53ef\u4ee5\u53ea\u58f0\u660e\u4e0d\u8d4b\u503c\uff0c\u7136\u540e\u518d\u8fdb\u884c\u4e00\u6b21\u6027\u7684\u8d4b\u503c\u3002<\/p>\n
final \u4e00\u822c\u7528\u4e8e\u4fee\u9970\u90a3\u4e9b\u901a\u7528\u6027\u7684\u529f\u80fd\u3001\u5b9e\u73b0\u65b9\u5f0f\u6216\u53d6\u503c\u4e0d\u80fd\u968f\u610f\u88ab\u6539\u53d8\u7684\u6570\u636e\uff0c\u4ee5\u907f\u514d\u88ab\u8bef\u7528\uff0c\u4f8b\u5982\u5b9e\u73b0\u6570\u5b66\u4e09\u89d2\u65b9\u6cd5\u3001\u5e42\u8fd0\u7b97\u7b49\u529f\u80fd\u7684\u65b9\u6cd5\uff0c\u4ee5\u53ca\u6570\u5b66\u5e38\u91cf\u03c0=3.141593\u3001e=2.71828 \u7b49\u3002<\/p>\n
\u4e8b\u5b9e\u4e0a\uff0c\u4e3a\u786e\u4fdd\u7ec8\u6001\u6027\uff0c\u63d0\u4f9b\u4e86\u4e0a\u8ff0\u65b9\u6cd5\u548c\u5e38\u91cf\u7684 java.lang.Math \u7c7b\u4e5f\u5df2\u88ab\u5b9a\u4e49\u4e3afinal \u7684\u3002<\/p>\n
\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5982\u679c\u5c06\u5f15\u7528\u7c7b\u578b\uff08\u4efb\u4f55\u7c7b\u7684\u7c7b\u578b\uff09\u7684\u53d8\u91cf\u6807\u8bb0\u4e3a final\uff0c\u90a3\u4e48\u8be5\u53d8\u91cf\u4e0d\u80fd\u6307\u5411\u4efb\u4f55\u5176\u5b83\u5bf9\u8c61\u3002\u4f46\u53ef\u4ee5\u6539\u53d8\u5bf9\u8c61\u7684\u5185\u5bb9\uff0c\u56e0\u4e3a\u53ea\u6709\u5f15\u7528\u672c\u8eab\u662f final \u7684\u3002<\/p>\n
\u5982\u679c\u53d8\u91cf\u88ab\u6807\u8bb0\u4e3a final\uff0c\u5176\u7ed3\u679c\u662f\u4f7f\u5b83\u6210\u4e3a\u5e38\u6570\u3002\u60f3\u6539\u53d8 final \u53d8\u91cf\u7684\u503c\u4f1a\u5bfc\u81f4\u4e00\u4e2a\u7f16\u8bd1\u9519\u8bef\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u6b63\u786e\u5b9a\u4e49 final \u53d8\u91cf\u7684\u4f8b\u5b50\uff1a
\npublic final int MAX_ARRAY_SIZE = 25; \/\/ \u5e38\u91cf\u540d\u4e00\u822c\u5927\u5199
\n\u5e38\u91cf\u56e0\u4e3a\u6709 final \u4fee\u9970\uff0c\u6240\u4ee5\u4e0d\u80fd\u88ab\u7ee7\u627f\u3002<\/p>\n
\u8bf7\u770b\u4e0b\u9762\u7684\u4ee3\u7801\uff1a
\n[java]public final class Demo{
\n\u00a0\u00a0\u00a0 public static final int TOTAL_NUMBER = 5;
\n\u00a0\u00a0\u00a0 public int id;
\n\u00a0\u00a0\u00a0 public Demo() {
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/\/ \u975e\u6cd5\uff0c\u5bf9final\u53d8\u91cfTOTAL_NUMBER\u8fdb\u884c\u4e8c\u6b21\u8d4b\u503c\u4e86
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/\/ \u56e0\u4e3a++TOTAL_NUMBER\u76f8\u5f53\u4e8e TOTAL_NUMBER=TOTAL_NUMBER+1
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 id = ++TOTAL_NUMBER;
\n\u00a0\u00a0\u00a0 }
\n\u00a0\u00a0\u00a0 public static void main(String[] args) {
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 final Demo t = new Demo();
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 final int i = 10;
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 final int j;
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 j = 20;
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 j = 30; \/\/ \u975e\u6cd5\uff0c\u5bf9final\u53d8\u91cf\u8fdb\u884c\u4e8c\u6b21\u8d4b\u503c
\n\u00a0\u00a0\u00a0 }
\n}[\/java]<\/p>\n
final \u4e5f\u53ef\u4ee5\u7528\u6765\u4fee\u9970\u7c7b\uff08\u653e\u5728 class \u5173\u952e\u5b57\u524d\u9762\uff09\uff0c\u963b\u6b62\u8be5\u7c7b\u518d\u6d3e\u751f\u51fa\u5b50\u7c7b\uff0c\u4f8b\u5982 Java.lang.String \u5c31\u662f\u4e00\u4e2a final \u7c7b\u3002\u8fd9\u6837\u505a\u662f\u51fa\u4e8e\u5b89\u5168\u539f\u56e0\uff0c\u56e0\u4e3a\u8981\u4fdd\u8bc1\u4e00\u65e6\u6709\u5b57\u7b26\u4e32\u7684\u5f15\u7528\uff0c\u5c31\u5fc5\u987b\u662f\u7c7b String \u7684\u5b57\u7b26\u4e32\uff0c\u800c\u4e0d\u662f\u67d0\u4e2a\u5176\u5b83\u7c7b\u7684\u5b57\u7b26\u4e32\uff08String \u7c7b\u53ef\u80fd\u88ab\u6076\u610f\u7ee7\u627f\u5e76\u7be1\u6539\uff09\u3002<\/p>\n
\u65b9\u6cd5\u4e5f\u53ef\u4ee5\u88ab final \u4fee\u9970\uff0c\u88ab final \u4fee\u9970\u7684\u65b9\u6cd5\u4e0d\u80fd\u88ab\u8986\u76d6\uff1b\u53d8\u91cf\u4e5f\u53ef\u4ee5\u88ab final \u4fee\u9970\uff0c\u88ab final \u4fee\u9970\u7684\u53d8\u91cf\u5728\u521b\u5efa\u5bf9\u8c61\u4ee5\u540e\u5c31\u4e0d\u5141\u8bb8\u6539\u53d8\u5b83\u4eec\u7684\u503c\u4e86\u3002\u4e00\u65e6\u5c06\u4e00\u4e2a\u7c7b\u58f0\u660e\u4e3a final\uff0c\u90a3\u4e48\u8be5\u7c7b\u5305\u542b\u7684\u65b9\u6cd5\u4e5f\u5c06\u88ab\u9690\u5f0f\u5730\u58f0\u660e\u4e3a final\uff0c\u4f46\u662f\u53d8\u91cf\u4e0d\u662f\u3002<\/p>\n
\u88ab final \u4fee\u9970\u7684\u65b9\u6cd5\u4e3a\u9759\u6001\u7ed1\u5b9a\uff0c\u4e0d\u4f1a\u4ea7\u751f\u591a\u6001\uff08\u52a8\u6001\u7ed1\u5b9a\uff09\uff0c\u7a0b\u5e8f\u5728\u8fd0\u884c\u65f6\u4e0d\u9700\u8981\u518d\u68c0\u7d22\u65b9\u6cd5\u8868\uff0c\u80fd\u591f\u63d0\u9ad8\u4ee3\u7801\u7684\u6267\u884c\u6548\u7387\u3002\u5728Java\u4e2d\uff0c\u88ab static \u6216 private \u4fee\u9970\u7684\u65b9\u6cd5\u4f1a\u88ab\u9690\u5f0f\u7684\u58f0\u660e\u4e3a final\uff0c\u56e0\u4e3a\u52a8\u6001\u7ed1\u5b9a\u6ca1\u6709\u610f\u4e49\u3002<\/p>\n
\u7531\u4e8e\u52a8\u6001\u7ed1\u5b9a\u4f1a\u6d88\u8017\u8d44\u6e90\u5e76\u4e14\u5f88\u591a\u65f6\u5019\u6ca1\u6709\u5fc5\u8981\uff0c\u6240\u4ee5\u6709\u4e00\u4e9b\u7a0b\u5e8f\u5458\u8ba4\u4e3a\uff1a\u9664\u975e\u6709\u8db3\u591f\u7684\u7406\u7531\u4f7f\u7528\u591a\u6001\u6027\uff0c\u5426\u5219\u5e94\u8be5\u5c06\u6240\u6709\u7684\u65b9\u6cd5\u90fd\u7528 final \u4fee\u9970\u3002<\/p>\n
\u8fd9\u6837\u7684\u8ba4\u8bc6\u672a\u514d\u6709\u4e9b\u504f\u6fc0\uff0c\u56e0\u4e3a JVM \u4e2d\u7684\u5373\u65f6\u7f16\u8bd1\u5668\u80fd\u591f\u5b9e\u65f6\u76d1\u63a7\u7a0b\u5e8f\u7684\u8fd0\u884c\u4fe1\u606f\uff0c\u53ef\u4ee5\u51c6\u786e\u7684\u77e5\u9053\u7c7b\u4e4b\u95f4\u7684\u7ee7\u627f\u5173\u7cfb\u3002\u5982\u679c\u4e00\u4e2a\u65b9\u6cd5\u6ca1\u6709\u88ab\u8986\u76d6\u5e76\u4e14\u5f88\u77ed\uff0c\u7f16\u8bd1\u5668\u5c31\u80fd\u591f\u5bf9\u5b83\u8fdb\u884c\u4f18\u5316\u5904\u7406\uff0c\u8fd9\u4e2a\u8fc7\u7a0b\u4e3a\u79f0\u4e3a\u5185\u8054(inlining)\u3002\u4f8b\u5982\uff0c\u5185\u8054\u8c03\u7528 e.getName() \u5c06\u88ab\u66ff\u6362\u4e3a\u8bbf\u95ee e.name \u53d8\u91cf\u3002\u8fd9\u662f\u4e00\u9879\u5f88\u6709\u610f\u4e49\u7684\u6539\u8fdb\uff0c\u8fd9\u662f\u7531\u4e8eCPU\u5728\u5904\u7406\u8c03\u7528\u65b9\u6cd5\u7684\u6307\u4ee4\u65f6\uff0c\u4f7f\u7528\u7684\u5206\u652f\u8f6c\u79fb\u4f1a\u6270\u4e71\u9884\u53d6\u6307\u4ee4\u7684\u7b56\u7565\uff0c\u6240\u4ee5\uff0c\u8fd9\u88ab\u89c6\u4e3a\u4e0d\u53d7\u6b22\u8fce\u7684\u3002\u7136\u800c\uff0c\u5982\u679c getName() \u5728\u53e6\u5916\u4e00\u4e2a\u7c7b\u4e2d\u88ab\u8986\u76d6\uff0c\u90a3\u4e48\u7f16\u8bd1\u5668\u5c31\u65e0\u6cd5\u77e5\u9053\u8986\u76d6\u7684\u4ee3\u7801\u5c06\u4f1a\u505a\u4ec0\u4e48\u64cd\u4f5c\uff0c\u56e0\u6b64\u4e5f\u5c31\u4e0d\u80fd\u5bf9\u5b83\u8fdb\u884c\u5185\u8054\u5904\u7406\u4e86\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5728 Java \u4e2d\uff0c\u58f0\u660e\u7c7b\u3001\u53d8\u91cf\u548c\u65b9\u6cd5\u65f6\uff0c\u53ef\u4f7f\u7528\u5173\u952e\u5b57 final \u6765\u4fee\u9970\u3002final \u6240\u4fee\u9970\u7684\u6570\u636e\u5177\u6709\u201c\u7ec8\u6001\u201d […]<\/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],"_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}]}}