{"id":54,"date":"2025-04-11T14:24:15","date_gmt":"2025-04-11T06:24:15","guid":{"rendered":"https:\/\/unmi.cc\/?p=54"},"modified":"2025-04-11T14:34:14","modified_gmt":"2025-04-11T06:34:14","slug":"understand-java-enum-with-bytecode","status":"publish","type":"post","link":"https:\/\/unmi.cc\/understand-java-enum-with-bytecode\/","title":{"rendered":"\u901a\u8fc7\u53cd\u7f16\u8bd1\u5b57\u8282\u7801\u6765\u7406\u89e3 Java \u679a\u4e3e"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\"><strong>\u4e3a\u4ec0\u4e48\u6df1\u5165\u7406\u89e3 Java \u679a\u4e3e\u5f88\u91cd\u8981<\/strong><\/h2>\n\n\n\n<p>Java \u679a\u4e3e\u4e0d\u4ec5\u4ec5\u662f\u5b9a\u4e49\u5e38\u91cf\u7684\u4e00\u79cd\u7b80\u6d01\u65b9\u5f0f\u3002\u5b83\u4eec\u5728\u5e95\u5c42\u5176\u5b9e\u662f\u5b8c\u6574\u7684\u7c7b\uff0c\u62e5\u6709\u65b9\u6cd5\u3001\u5b57\u6bb5\u4ee5\u53ca\u884c\u4e3a\u3002\u8fd9\u4f7f\u5f97\u679a\u4e3e\u5728\u9700\u8981\u660e\u786e\u5b9a\u4e49\u72b6\u6001\u6216\u884c\u4e3a\u7684\u590d\u6742\u5e94\u7528\u4e2d\u53d8\u5f97\u975e\u5e38\u5f3a\u5927\u800c\u7075\u6d3b\u3002<\/p>\n\n\n\n<p>\u5bf9\u4e8e\u5f88\u591a\u5f00\u53d1\u8005\u6765\u8bf4\uff0c\u679a\u4e3e\u770b\u8d77\u6765\u5f88\u7b80\u5355\u3002\u7136\u800c\uff0c\u5982\u679c\u82b1\u65f6\u95f4\u53cd\u7f16\u8bd1\u7f16\u8bd1\u540e\u7684\u5b57\u8282\u7801\uff0c\u4f60\u4f1a\u53d1\u73b0\u4e00\u4e9b\u6709\u7528\u7684\u6a21\u5f0f\u3002\u8fd9\u6709\u52a9\u4e8e\u66f4\u6e05\u695a\u5730\u7406\u89e3 Java \u5728\u8fd0\u884c\u65f6\u5982\u4f55\u5904\u7406\u679a\u4e3e\uff0c\u4ee5\u53ca\u4e3a\u4ec0\u4e48\u67d0\u4e9b\u884c\u4e3a\u88ab\u5141\u8bb8\u6216\u7981\u6b62\u3002<\/p>\n\n\n\n<p>\u901a\u8fc7\u67e5\u770b Java \u4e3a\u679a\u4e3e\u751f\u6210\u7684 class \u6587\u4ef6\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u66f4\u6df1\u5165\u5730\u7406\u89e3\u679a\u4e3e\u7c7b\u578b\u7684\u5de5\u4f5c\u539f\u7406\uff0c\u4ee5\u53ca Java \u7f16\u8bd1\u5668\u662f\u5982\u4f55\u6784\u5efa\u5b83\u4eec\u7684\u3002\u8fd9\u5c06\u6709\u52a9\u4e8e\u505a\u51fa\u66f4\u597d\u7684\u8bbe\u8ba1\u51b3\u7b56\u548c\u63d0\u5347<a href=\"https:\/\/www.cnblogs.com\/Chary\/p\/16522149.html\" target=\"_blank\" rel=\"noreferrer noopener\">\u8c03\u8bd5\u6280\u5de7<\/a>\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u679a\u4e3e\u7684\u57fa\u7840\u53ca\u7f16\u8bd1\u5668\u7684\u89d2\u8272<\/strong><\/h2>\n\n\n\n<p>\u5728\u4ee3\u7801\u4e2d\uff0c\u679a\u4e3e\u770b\u8d77\u6765\u50cf\u662f\u4e00\u7ec4\u7b80\u5316\u7684\u5e38\u91cf\u3002\u4f46\u4e00\u65e6\u7f16\u8bd1\uff0c\u5b83\u5c31\u53d8\u6210\u4e86\u5e26\u6709\u989d\u5916\u7ed3\u6784\u7684\u5408\u6210\u7c7b\uff08synthetic class\uff09\u3002\u4f8b\u5982\uff0cJava \u81ea\u52a8\u4e3a\u6bcf\u4e2a\u5e38\u91cf\u751f\u6210\u9759\u6001\u5b57\u6bb5\uff0c\u5e76\u5728\u5e55\u540e\u6dfb\u52a0 values() \u548c valueOf() \u7b49\u65b9\u6cd5\u3002<\/p>\n\n\n\n<p>\u8fd9\u4e9b\u8f6c\u6362\u5b8c\u5168\u7531\u7f16\u8bd1\u5668\u5904\u7406\u3002\u8868\u9762\u4e0a\u770b\u8d77\u6765\u7b80\u5355\u7684\u503c\u5217\u8868\uff0c\u5b9e\u9645\u4e0a\u88ab\u8f6c\u6362\u4e3a\u7ee7\u627f\u81ea java.lang.Enum \u7684\u7c7b\u3002\u7406\u89e3\u8fd9\u79cd\u8f6c\u6362\u5bf9\u4e8e\u8c03\u8bd5\u6216\u5f00\u53d1\u4f9d\u8d56\u679a\u4e3e\u5143\u6570\u636e\u7684\u6846\u67b6\u975e\u5e38\u6709\u7528\u3002<\/p>\n\n\n\n<p>\u67e5\u770b class \u6587\u4ef6\u4f60\u4f1a\u53d1\u73b0\uff0c\u6bcf\u4e2a\u679a\u4e3e\u5e38\u91cf\u5b9e\u9645\u4e0a\u662f\u679a\u4e3e\u7c7b\u81ea\u8eab\u7684\u9759\u6001 final \u5b9e\u4f8b\u3002\u8fd9\u4e0d\u662f\u8bed\u6cd5\u7cd6\uff0c\u800c\u662f\u4e00\u79cd\u6709\u7ed3\u6784\u3001\u6709\u5185\u5b58\u8868\u73b0\u548c\u884c\u4e3a\u5f71\u54cd\u7684\u8bbe\u8ba1\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u5b57\u8282\u7801\u53cd\u7f16\u8bd1\u5982\u4f55\u63ed\u793a\u884c\u4e3a<\/strong><\/h2>\n\n\n\n<p>\u4f7f\u7528\u5982 javap \u7b49\u5de5\u5177\uff0c\u4f60\u53ef\u4ee5\u67e5\u770b\u4efb\u4f55 Java \u679a\u4e3e\u7684\u5b57\u8282\u7801\u8f93\u51fa\u3002\u53cd\u7f16\u8bd1\u540e\u7684\u7c7b\u4e0d\u4ec5\u5c55\u793a\u4e86\u7f16\u8bd1\u5668\u6dfb\u52a0\u7684\u5b57\u6bb5\u548c\u65b9\u6cd5\uff0c\u8fd8\u63ed\u793a\u4e86\u5e38\u91cf\u5982\u4f55\u4f5c\u4e3a\u5355\u4f8b\uff08singleton\uff09\u5b9e\u4f8b\u88ab\u5904\u7406\u3002<\/p>\n\n\n\n<p>\u4f8b\u5982\uff0c\u4f60\u4f1a\u6ce8\u610f\u5230\u679a\u4e3e\u6784\u9020\u65b9\u6cd5\u603b\u662f private \u6216\u5305\u79c1\u6709\u7684\u3002\u8fd9\u662f\u56e0\u4e3a\u679a\u4e3e\u5e38\u91cf\u53ea\u80fd\u5728\u7c7b\u5185\u90e8\u521d\u59cb\u5316\uff0c\u65e0\u6cd5\u5728\u5916\u90e8\u521b\u5efa\u65b0\u5b9e\u4f8b\u3002\u8fd9\u79cd\u9650\u5236\u5728\u751f\u6210\u7684\u5b57\u8282\u7801\u4e2d\u4f53\u73b0\u5f97\u5f88\u660e\u786e\u3002<\/p>\n\n\n\n<p>\u901a\u8fc7\u89c2\u5bdf\u53cd\u7f16\u8bd1\u7ed3\u679c\uff0c\u4f60\u80fd\u66f4\u6e05\u6670\u5730\u7406\u89e3\u679a\u4e3e\u503c\u5982\u4f55\u6620\u5c04\u4e3a\u5e8f\u53f7\uff08ordinal\uff09\uff0c\u4ee5\u53ca\u4e3a\u4ec0\u4e48\u53cd\u5c04\u5728\u679a\u4e3e\u4e0a\u7684\u884c\u4e3a\u4e0d\u540c\u4e8e\u5176\u4ed6\u5bf9\u8c61\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u7406\u89e3\u81ea\u52a8\u751f\u6210\u7684 <\/strong><strong>values()<\/strong><strong> \u65b9\u6cd5<\/strong><\/h2>\n\n\n\n<p>Java \u679a\u4e3e\u7684\u4fbf\u5229\u4e4b\u4e00\u662f values() \u65b9\u6cd5\u3002\u5b83\u8fd4\u56de\u6240\u6709\u5b9a\u4e49\u7684\u679a\u4e3e\u5e38\u91cf\u6570\u7ec4\uff0c\u4f46\u4f60\u5e76\u4e0d\u9700\u8981\u5728\u6e90\u4ee3\u7801\u4e2d\u663e\u5f0f\u7f16\u5199\uff0c\u7f16\u8bd1\u5668\u4f1a\u81ea\u52a8\u751f\u6210\u3002<\/p>\n\n\n\n<p>\u5f53\u4f60\u53cd\u7f16\u8bd1\u4e00\u4e2a\u679a\u4e3e\u7c7b\u65f6\uff0c\u8fd9\u4e2a\u65b9\u6cd5\u4f1a\u4ee5 synthetic static \u65b9\u6cd5\u7684\u5f62\u5f0f\u51fa\u73b0\u5728\u5b57\u8282\u7801\u4e2d\u3002\u5b83\u4f9d\u8d56\u4e8e\u4e00\u4e2a\u7f13\u5b58\u7684\u5185\u90e8\u679a\u4e3e\u5b9e\u4f8b\u6570\u7ec4\u3002\u6b63\u56e0\u5982\u6b64\uff0c\u679a\u4e3e\u5e38\u91cf\u5728\u8fd0\u884c\u65f6\u662f\u4e0d\u53ef\u4fee\u6539\u7684\uff0c\u5426\u5219\u4f1a\u7834\u574f\u5176\u5185\u90e8\u7ed3\u6784\u3002<\/p>\n\n\n\n<p>\u4e86\u89e3 values() \u65b9\u6cd5\u7684\u751f\u6210\u673a\u5236\uff0c\u6709\u52a9\u4e8e\u4f60\u7f16\u5199\u5904\u7406\u679a\u4e3e\u7684\u901a\u7528\u5de5\u5177\u6216\u5e8f\u5217\u5316\u5668\uff0c\u4e5f\u80fd\u5728\u8c03\u8bd5\u6570\u7ec4\u62f7\u8d1d\u6216\u5f15\u7528\u9519\u8bef\u65f6\u63d0\u4f9b\u5e2e\u52a9\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u679a\u4e3e\u7684\u6784\u9020\u65b9\u6cd5\u4e0e\u5b57\u6bb5<\/strong><\/h2>\n\n\n\n<p>Java \u4e2d\u7684\u679a\u4e3e\u53ef\u4ee5\u62e5\u6709\u6784\u9020\u51fd\u6570\u3001\u5b57\u6bb5\u548c\u65b9\u6cd5\u3002\u5f88\u591a\u5f00\u53d1\u8005\u4ee5\u4e3a\u679a\u4e3e\u53ea\u662f\u9759\u6001\u5e38\u91cf\uff0c\u56e0\u6b64\u5bf9\u6b64\u611f\u5230\u60ca\u8bb6\u3002\u901a\u8fc7\u53cd\u7f16\u8bd1\u5b57\u8282\u7801\u53ef\u4ee5\u6e05\u695a\u5730\u770b\u5230\uff0c\u679a\u4e3e\u6784\u9020\u51fd\u6570\u4e0e\u666e\u901a\u7c7b\u6784\u9020\u51fd\u6570\u7c7b\u4f3c\uff0c\u53ea\u662f\u5176\u53ef\u89c1\u6027\u88ab\u9650\u5236\uff0c\u4e14\u6709\u9884\u5b9a\u4e49\u53c2\u6570\u3002<\/p>\n\n\n\n<p>\u6bcf\u4e2a\u679a\u4e3e\u5e38\u91cf\u5728\u5b9a\u4e49\u65f6\u4f1a\u5411\u6784\u9020\u51fd\u6570\u4f20\u9012\u503c\u3002\u53cd\u7f16\u8bd1\u540e\u7684\u5b57\u8282\u7801\u4f1a\u5c55\u793a\u8fd9\u4e9b\u53c2\u6570\u662f\u5982\u4f55\u5904\u7406\u7684\uff0c\u5305\u62ec\u7f16\u8bd1\u5668\u81ea\u52a8\u4f20\u9012\u7684\u540d\u79f0\uff08name\uff09\u548c\u5e8f\u53f7\uff08ordinal\uff09\u503c\u3002<\/p>\n\n\n\n<p>\u5f53\u679a\u4e3e\u7528\u4e8e\u4fdd\u5b58\u914d\u7f6e\u3001\u5143\u6570\u636e\u6216\u5c01\u88c5\u884c\u4e3a\u65f6\uff0c\u8fd9\u4e00\u7ed3\u6784\u5c24\u4e3a\u5173\u952e\u3002\u7406\u89e3\u6784\u9020\u51fd\u6570\u7684\u5185\u90e8\u673a\u5236\u80fd\u8ba9\u4f60\u8bbe\u8ba1\u5f97\u66f4\u5b89\u5168\u3001\u66f4\u7075\u6d3b\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u679a\u4e3e\u7684\u7ee7\u627f\u7ed3\u6784\u53ca\u5176\u9650\u5236<\/strong><\/h2>\n\n\n\n<p>Java \u679a\u4e3e\u53ef\u4ee5\u5b9e\u73b0\u63a5\u53e3\uff0c\u4f46\u4e0d\u80fd\u7ee7\u627f\u5176\u4ed6\u7c7b\u3002\u53cd\u7f16\u8bd1\u540e\u7684\u679a\u4e3e\u6e05\u6670\u5730\u5c55\u793a\u4e86\u5176\u7ee7\u627f\u7ed3\u6784\u2014\u2014\u6240\u6709\u679a\u4e3e\u90fd\u7ee7\u627f\u81ea java.lang.Enum\uff0c\u800c\u8be5\u7c7b\u662f final \u7684\u3002<\/p>\n\n\n\n<p>\u8fd9\u4e00\u8bbe\u8ba1\u867d\u7136\u9650\u5236\u4e86\u679a\u4e3e\u7684\u7ee7\u627f\u80fd\u529b\uff0c\u4f46\u4e5f\u63d0\u5347\u4e86\u5176\u53ef\u9884\u6d4b\u6027\u3002\u5f53\u4f60\u67e5\u770b\u5b57\u8282\u7801\u65f6\uff0c\u66f4\u5bb9\u6613\u7406\u89e3\u4e3a\u4f55\u5c1d\u8bd5\u7ee7\u627f\u679a\u4e3e\u4f1a\u51fa\u9519\u3002\u8fd9\u79cd\u9650\u5236\u5b58\u5728\u7684\u76ee\u7684\u662f\u4e3a\u4e86\u4fdd\u6301\u7c7b\u578b\u5b89\u5168\u548c\u5355\u4f8b\u5b9e\u4f8b\u7684\u4e00\u81f4\u6027\u3002<\/p>\n\n\n\n<p>\u5982\u679c\u4f60\u9700\u8981\u53ef\u590d\u7528\u7684\u884c\u4e3a\uff0c\u5b9e\u73b0\u63a5\u53e3\u6216\u4f7f\u7528\u7ec4\u5408\uff08composition\uff09\u662f\u66f4\u5b89\u5168\u7684\u8def\u5f84\u3002\u5b57\u8282\u7801\u7684\u68c0\u67e5\u80fd\u5f3a\u5316\u8fd9\u4e9b\u5b9e\u8df5\uff0c\u56e0\u4e3a\u5b83\u5c55\u793a\u4e86 Java \u5982\u4f55\u5728\u7c7b\u5c42\u7ea7\u4e0a\u5f3a\u5236\u6267\u884c\u679a\u4e3e\u7684\u7ea6\u675f\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u5e38\u91cf\u7279\u5b9a\u65b9\u6cd5\u4f53\uff08Constant-Specific Method Bodies\uff09<\/strong><\/h2>\n\n\n\n<p>Java \u679a\u4e3e\u4e00\u4e2a\u8f83\u9ad8\u7ea7\u7684\u7279\u6027\u662f\uff1a\u6bcf\u4e2a\u5e38\u91cf\u53ef\u4ee5\u8986\u76d6\u65b9\u6cd5\u6216\u62e5\u6709\u81ea\u5df1\u7684\u5b9e\u73b0\u3002\u5728\u53cd\u7f16\u8bd1\u540e\u7684\u5b57\u8282\u7801\u4e2d\uff0c\u8fd9\u79cd\u884c\u4e3a\u4f1a\u66f4\u6e05\u6670\u5730\u5c55\u73b0\u51fa\u6765\u3002<\/p>\n\n\n\n<p>\u4f8b\u5982\uff0c\u82e5\u67d0\u4e2a\u679a\u4e3e\u5e38\u91cf\u8986\u76d6\u4e86\u4e00\u4e2a\u62bd\u8c61\u65b9\u6cd5\uff0c\u90a3\u4e48\u6bcf\u4e2a\u5e38\u91cf\u5176\u5b9e\u90fd\u662f\u4e00\u4e2a\u533f\u540d\u5b50\u7c7b\u3002\u8fd9\u4e9b\u5185\u90e8\u7ed3\u6784\u5728\u53cd\u7f16\u8bd1\u7ed3\u679c\u4e2d\u4e00\u76ee\u4e86\u7136\u3002<\/p>\n\n\n\n<p>\u8fd9\u79cd\u6d1e\u5bdf\u5bf9\u4f7f\u7528\u679a\u4e3e\u8fdb\u884c\u7b56\u7565\u6a21\u5f0f\u3001\u547d\u4ee4\u8def\u7531\u7b49\u591a\u6001\u903b\u8f91\u975e\u5e38\u6709\u5e2e\u52a9\u3002\u4e86\u89e3 JVM \u5982\u4f55\u8868\u793a\u8fd9\u4e9b\u8986\u76d6\u5b9e\u73b0\uff0c\u6709\u52a9\u4e8e\u4f60\u66f4\u597d\u5730\u638c\u63e1\u7c7b\u52a0\u8f7d\u548c\u5185\u5b58\u884c\u4e3a\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u4ece\u5b57\u8282\u7801\u89d2\u5ea6\u770b\u5e38\u89c1\u9677\u9631<\/strong><\/h2>\n\n\n\n<p>\u6709\u4e9b\u56f4\u7ed5\u679a\u4e3e\u7684 bug \u6216\u8bef\u89e3\uff0c\u6765\u81ea\u5bf9\u5176\u5185\u90e8\u5904\u7406\u673a\u5236\u7684\u4e0d\u6e05\u695a\u3002\u4f8b\u5982\uff0c\u5c1d\u8bd5 clone \u679a\u4e3e\u6216\u4f7f\u7528 new \u521b\u5efa\u679a\u4e3e\u5b9e\u4f8b\u90fd\u4f1a\u5931\u8d25\uff0c\u4f46\u901a\u8fc7\u67e5\u770b\u5b57\u8282\u7801\u4f60\u4f1a\u660e\u767d\u539f\u56e0\u3002<\/p>\n\n\n\n<p>\u7531\u4e8e\u679a\u4e3e\u5e38\u91cf\u662f static \u4e14 final \u7684\uff0c\u6784\u9020\u51fd\u6570\u4e5f\u662f\u79c1\u6709\u7684\uff0c\u56e0\u6b64 Java \u5f3a\u5236\u4fdd\u6301\u5176\u4e0d\u53ef\u53d8\u6027\u548c\u5355\u4f8b\u7279\u6027\u3002\u5b57\u8282\u7801\u8868\u660e\uff0c\u8fd9\u4e9b\u7ea6\u675f\u4e0d\u53ef\u80fd\u88ab\u7834\u574f\uff0c\u9664\u975e\u4f7f\u7528\u53cd\u5c04\u6280\u5de7\u2014\u2014\u800c\u8fd9\u901a\u5e38\u5e76\u4e0d\u63a8\u8350\u3002<\/p>\n\n\n\n<p>\u901a\u8fc7\u68c0\u67e5\u5b57\u8282\u7801\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u5728\u95ee\u9898\u53d1\u751f\u524d\u5c31\u53d1\u73b0\u6f5c\u5728\u9519\u8bef\u3002\u65e0\u8bba\u662f\u8bef\u7528\u76f8\u7b49\u5224\u65ad\u3001\u8bef\u89e3 ordinal() \u65b9\u6cd5\u7684\u7528\u9014\uff0c\u8fd8\u662f\u5bf9\u53ef\u53d8\u6027\u7684\u8bef\u5224\uff0cclass \u6587\u4ef6\u4e2d\u90fd\u85cf\u6709\u6709\u4ef7\u503c\u7684\u7b54\u6848\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u679a\u4e3e\u5b57\u8282\u7801\u76f8\u5173\u7684\u8c03\u8bd5\u6280\u5de7<\/strong><\/h2>\n\n\n\n<p>\u5728\u5927\u578b\u7cfb\u7edf\u4e2d\uff0c\u679a\u4e3e\u5e38\u7528\u4e8e\u5e8f\u5217\u5316\u6216\u7f51\u7edc\u901a\u4fe1\u534f\u8bae\u3002\u8fd9\u7c7b\u573a\u666f\u4e2d\uff0c\u5982\u679c\u4f60\u719f\u6089\u679a\u4e3e\u7684\u5b57\u8282\u7801\u7ed3\u6784\uff0c\u5c31\u80fd\u66f4\u597d\u5730\u5e94\u5bf9\u8c03\u8bd5\u96be\u9898\u3002\u4f8b\u5982\uff0c\u53cd\u5e8f\u5217\u5316\u5931\u8d25\u5f80\u5f80\u6e90\u4e8e\u5e38\u91cf\u7f3a\u5931\u6216\u540d\u79f0\u4e0d\u4e00\u81f4\u3002<\/p>\n\n\n\n<p>\u73b0\u4ee3 IDE \u7684\u8c03\u8bd5\u5668\u6216 javap \u7b49\u5de5\u5177\u652f\u6301\u5b57\u8282\u7801\u67e5\u770b\u529f\u80fd\uff0c\u53ef\u4ee5\u63d0\u4f9b\u6bd4\u6e90\u7801\u66f4\u76f4\u63a5\u7684\u7ed3\u6784\u6d1e\u5bdf\u3002\u4f60\u53ef\u4ee5\u66f4\u6e05\u695a\u5730\u4e86\u89e3\u679a\u4e3e\u5e38\u91cf\u5728\u5185\u5b58\u4e2d\u7684\u5206\u5e03\u65b9\u5f0f\uff0c\u4ee5\u53ca\u7a0b\u5e8f\u5176\u4ed6\u90e8\u5206\u662f\u5982\u4f55\u5f15\u7528\u5b83\u4eec\u7684\u3002<\/p>\n\n\n\n<p>\u8fd9\u79cd\u8c03\u8bd5\u65b9\u5f0f\u5728\u6846\u67b6\u5f00\u53d1\u3001\u5fae\u670d\u52a1\u67b6\u6784\u6216\u4f7f\u7528\u679a\u4e3e\u4f5c\u4e3a\u914d\u7f6e\u7684\u7cfb\u7edf\u4e2d\u5c24\u4e3a\u91cd\u8981\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u603b\u7ed3\uff1a\u6df1\u5165\u7406\u89e3 Java \u679a\u4e3e\u7684\u5185\u90e8\u673a\u5236<\/strong><\/h2>\n\n\n\n<p>\u8d85\u8d8a\u8868\u5c42\u53bb\u7406\u89e3 Java \u679a\u4e3e\uff0c\u6709\u52a9\u4e8e\u63d0\u5347\u4f60\u7684\u5f00\u53d1\u6c34\u5e73\u3002\u901a\u8fc7\u53cd\u7f16\u8bd1\u5b57\u8282\u7801\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u770b\u6e05 Java \u7f16\u8bd1\u5668\u751f\u6210\u7684\u771f\u5b9e\u7ed3\u6784\uff0c\u4ee5\u53ca JVM \u662f\u5982\u4f55\u89e3\u91ca\u8fd9\u4e9b\u7ed3\u6784\u7684\u3002<\/p>\n\n\n\n<p>\u8fd9\u79cd\u65b9\u6cd5\u80fd\u8ba9\u4f60\u5728\u9879\u76ee\u4e2d\u66f4\u81ea\u4fe1\u5730\u4f7f\u7528\u679a\u4e3e\uff0c\u652f\u6301\u66f4\u597d\u7684\u8c03\u8bd5\u3001\u66f4\u6e05\u6670\u7684\u884c\u4e3a\u5224\u65ad\uff0c\u4e5f\u66f4\u5bb9\u6613\u5728\u6dfb\u52a0\u65b0\u5e38\u91cf\u6216\u903b\u8f91\u65f6\u5b89\u5168\u6269\u5c55\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e3a\u4ec0\u4e48\u6df1\u5165\u7406\u89e3 Java \u679a\u4e3e\u5f88\u91cd\u8981 Java \u679a\u4e3e\u4e0d\u4ec5\u4ec5\u662f\u5b9a\u4e49\u5e38\u91cf\u7684\u4e00\u79cd\u7b80\u6d01\u65b9\u5f0f\u3002\u5b83\u4eec\u5728\u5e95\u5c42\u5176\u5b9e\u662f\u5b8c\u6574\u7684\u7c7b\uff0c\u62e5\u6709\u65b9\u6cd5\u3001\u5b57\u6bb5\u4ee5\u53ca\u884c\u4e3a\u3002\u8fd9\u4f7f\u5f97\u679a\u4e3e\u5728\u9700\u8981\u660e\u786e\u5b9a\u4e49\u72b6\u6001\u6216\u884c\u4e3a\u7684\u590d\u6742\u5e94\u7528\u4e2d\u53d8\u5f97\u975e\u5e38\u5f3a\u5927\u800c\u7075\u6d3b\u3002 \u5bf9\u4e8e\u5f88\u591a\u5f00\u53d1\u8005\u6765\u8bf4\uff0c\u679a\u4e3e\u770b\u8d77\u6765\u5f88\u7b80\u5355\u3002\u7136\u800c\uff0c\u5982\u679c\u82b1\u65f6\u95f4\u53cd\u7f16\u8bd1\u7f16\u8bd1\u540e\u7684\u5b57\u8282\u7801\uff0c\u4f60\u4f1a\u53d1\u73b0\u4e00\u4e9b\u6709\u7528\u7684\u6a21\u5f0f\u3002\u8fd9\u6709\u52a9\u4e8e\u66f4\u6e05\u695a\u5730\u7406\u89e3 Java \u5728\u8fd0\u884c\u65f6\u5982\u4f55\u5904\u7406\u679a\u4e3e\uff0c\u4ee5\u53ca\u4e3a\u4ec0\u4e48\u67d0\u4e9b\u884c\u4e3a\u88ab\u5141\u8bb8\u6216\u7981\u6b62\u3002 \u901a\u8fc7\u67e5\u770b Java \u4e3a\u679a\u4e3e\u751f\u6210\u7684 class \u6587\u4ef6\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u66f4\u6df1\u5165\u5730\u7406\u89e3\u679a\u4e3e\u7c7b\u578b\u7684\u5de5\u4f5c\u539f\u7406\uff0c\u4ee5\u53ca Java \u7f16\u8bd1\u5668\u662f\u5982\u4f55\u6784\u5efa\u5b83\u4eec\u7684\u3002\u8fd9\u5c06\u6709\u52a9\u4e8e\u505a\u51fa\u66f4\u597d\u7684\u8bbe\u8ba1\u51b3\u7b56\u548c\u63d0\u5347\u8c03\u8bd5\u6280\u5de7\u3002 \u679a\u4e3e\u7684\u57fa\u7840\u53ca\u7f16\u8bd1\u5668\u7684\u89d2\u8272 \u5728\u4ee3\u7801\u4e2d\uff0c\u679a\u4e3e\u770b\u8d77\u6765\u50cf\u662f\u4e00\u7ec4\u7b80\u5316\u7684\u5e38\u91cf\u3002\u4f46\u4e00\u65e6\u7f16\u8bd1\uff0c\u5b83\u5c31\u53d8\u6210\u4e86\u5e26\u6709\u989d\u5916\u7ed3\u6784\u7684\u5408\u6210\u7c7b\uff08synthetic class\uff09\u3002\u4f8b\u5982\uff0cJava \u81ea\u52a8\u4e3a\u6bcf\u4e2a\u5e38\u91cf\u751f\u6210\u9759\u6001\u5b57\u6bb5\uff0c\u5e76\u5728\u5e55\u540e\u6dfb\u52a0 values() \u548c valueOf() \u7b49\u65b9\u6cd5\u3002 \u8fd9\u4e9b\u8f6c\u6362\u5b8c\u5168\u7531\u7f16\u8bd1\u5668\u5904\u7406\u3002\u8868\u9762\u4e0a\u770b\u8d77\u6765\u7b80\u5355\u7684\u503c\u5217\u8868\uff0c\u5b9e\u9645\u4e0a\u88ab\u8f6c\u6362\u4e3a\u7ee7\u627f\u81ea java.lang.Enum \u7684\u7c7b\u3002\u7406\u89e3\u8fd9\u79cd\u8f6c\u6362\u5bf9\u4e8e\u8c03\u8bd5\u6216\u5f00\u53d1\u4f9d\u8d56\u679a\u4e3e\u5143\u6570\u636e\u7684\u6846\u67b6\u975e\u5e38\u6709\u7528\u3002 \u67e5\u770b class \u6587\u4ef6\u4f60\u4f1a\u53d1\u73b0\uff0c\u6bcf\u4e2a\u679a\u4e3e\u5e38\u91cf\u5b9e\u9645\u4e0a\u662f\u679a\u4e3e\u7c7b\u81ea\u8eab\u7684\u9759\u6001 final \u5b9e\u4f8b\u3002\u8fd9\u4e0d\u662f\u8bed\u6cd5\u7cd6\uff0c\u800c\u662f\u4e00\u79cd\u6709\u7ed3\u6784\u3001\u6709\u5185\u5b58\u8868\u73b0\u548c\u884c\u4e3a\u5f71\u54cd\u7684\u8bbe\u8ba1\u3002 \u5b57\u8282\u7801\u53cd\u7f16\u8bd1\u5982\u4f55\u63ed\u793a\u884c\u4e3a \u4f7f\u7528\u5982 javap \u7b49\u5de5\u5177\uff0c\u4f60\u53ef\u4ee5\u67e5\u770b\u4efb\u4f55 Java \u679a\u4e3e\u7684\u5b57\u8282\u7801\u8f93\u51fa\u3002\u53cd\u7f16\u8bd1\u540e\u7684\u7c7b\u4e0d\u4ec5\u5c55\u793a\u4e86\u7f16\u8bd1\u5668\u6dfb\u52a0\u7684\u5b57\u6bb5\u548c\u65b9\u6cd5\uff0c\u8fd8\u63ed\u793a\u4e86\u5e38\u91cf\u5982\u4f55\u4f5c\u4e3a\u5355\u4f8b\uff08singleton\uff09\u5b9e\u4f8b\u88ab\u5904\u7406\u3002 \u4f8b\u5982\uff0c\u4f60\u4f1a\u6ce8\u610f\u5230\u679a\u4e3e\u6784\u9020\u65b9\u6cd5\u603b\u662f private \u6216\u5305\u79c1\u6709\u7684\u3002\u8fd9\u662f\u56e0\u4e3a\u679a\u4e3e\u5e38\u91cf\u53ea\u80fd\u5728\u7c7b\u5185\u90e8\u521d\u59cb\u5316\uff0c\u65e0\u6cd5\u5728\u5916\u90e8\u521b\u5efa\u65b0\u5b9e\u4f8b\u3002\u8fd9\u79cd\u9650\u5236\u5728\u751f\u6210\u7684\u5b57\u8282\u7801\u4e2d\u4f53\u73b0\u5f97\u5f88\u660e\u786e\u3002 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