{"id":362,"date":"2023-02-16T01:49:08","date_gmt":"2023-10-12T00:19:06","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/index.php\/2023\/11\/30\/java%e4%b8%ad%e7%9a%84%e6%9e%9a%e4%b8%be\/"},"modified":"2025-08-02T01:47:07","modified_gmt":"2025-08-01T17:47:07","slug":"java%e4%b8%ad%e7%9a%84%e6%9e%9a%e4%b8%be","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/java%e4%b8%ad%e7%9a%84%e6%9e%9a%e4%b8%be\/","title":{"rendered":"Java\u679a\u4e3e\u5b8c\u5168\u6307\u5357\uff1a\u4ece\u5165\u95e8\u5230\u7cbe\u901a\u7684\u5b9e\u4f8b\u8be6\u89e3"},"content":{"rendered":"

\u8fd9\u662f\u6587\u7ae0\u300aJava\u4e2d\u7684\u679a\u4e3e\u300b\u7684\u7b2c1\u90e8\u5206\uff08\u51713\u90e8\u5206\uff09\u3002<\/p>\n

\u5185\u5bb9\u7247\u6bb5: \u5728Java 1.5\u4e2d\u5f15\u5165\u4e86\u679a\u4e3e\u4f5c\u4e3a\u4e00\u79cd\u65b0\u7684\u7c7b\u578b\uff0c\u5176\u5b57\u6bb5\u7531\u4e00\u7ec4\u56fa\u5b9a\u7684\u5e38\u91cf\u7ec4\u6210\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u4f5c\u4e3aJava\u679a\u4e3e\u7684\u65b9\u5411\uff0c\u5176\u56fa\u5b9a\u5b57\u6bb5\u4e3a\u4e1c\uff08EAST\uff09\u3001\u897f\uff08WEST\uff09\u3001\u5317\uff08NORTH\uff09\u548c\u5357\uff08SOUTH\uff09\u3002<\/p>\n

Java\u679a\u4e3e<\/h2>\n
\n \"java\n<\/div>\n

Java\u679a\u4e3e\u793a\u4f8b<\/h2>\n

Java\u7684enum\u5173\u952e\u5b57\u7528\u4e8e\u521b\u5efa\u679a\u4e3e\u7c7b\u578b\u3002\u8ba9\u6211\u4eec\u6765\u770b\u4e00\u4e0bJava\u679a\u4e3e\u4f8b\u5b50\u7a0b\u5e8f\u3002<\/p>\n

package com.Olivia.enums;\r\n\r\npublic enum ThreadStates {\r\n\tSTART,\r\n\tRUNNING,\r\n\tWAITING,\r\n\tDEAD;\r\n}\r\n<\/code><\/pre>\n
\u5728\u4e0a\u8ff0\u793a\u4f8b\u4e2d\uff0cThreadStates\u662f\u5177\u6709\u56fa\u5b9a\u5e38\u91cf\u5b57\u6bb5START\u3001RUNNING\u3001WAITING\u548cDEAD\u7684\u679a\u4e3e\u7c7b\u578b\u3002<\/p>\n
Java \u679a\u4e3e vs \u5e38\u91cf<\/h2>\n
\u73b0\u5728\u8ba9\u6211\u4eec\u6765\u770b\u770bJava\u4e2d\u7684\u679a\u4e3e\u7c7b\u578b\u6bd4\u666e\u901a\u5e38\u91cf\u5b57\u6bb5\u66f4\u597d\u7684\u5730\u65b9\u3002\u8ba9\u6211\u4eec\u5728Java\u4e2d\u521b\u5efa\u4e00\u4e2a\u7c7b\u4f3c\u7684\u5e38\u91cf\u7c7b\u3002<\/p>\n
package com.Olivia.enums;\r\n\r\npublic class ThreadStatesConstant {\r\n\tpublic static final int START = 1;\r\n\tpublic static final int WAITING = 2;\r\n\tpublic static final int RUNNING = 3;\r\n\tpublic static final int DEAD = 4;\r\n}\r\n<\/code><\/pre>\n
\u73b0\u5728\u8ba9\u6211\u4eec\u770b\u4e00\u4e0b\u5728Java\u7a0b\u5e8f\u4e2d\u5982\u4f55\u4f7f\u7528\u679a\u4e3e\u548c\u5e38\u91cf\uff1a<\/p>\n
\/**\r\n* \u6b64\u65b9\u6cd5\u5c55\u793a\u4e86\u4f7f\u7528\u679a\u4e3e\u76f8\u5bf9\u4e8e\u5e38\u91cf\u7684\u4f18\u52bf\r\n*\/\r\nprivate static void benefitsOfEnumOverConstants() {\r\n\t\/\/\u679a\u4e3e\u503c\u662f\u56fa\u5b9a\u7684\r\n\tsimpleEnumExample(ThreadStates.START);\r\n\tsimpleEnumExample(ThreadStates.WAITING);\r\n\tsimpleEnumExample(ThreadStates.RUNNING);\r\n\tsimpleEnumExample(ThreadStates.DEAD);\r\n\tsimpleEnumExample(null);\r\n\t\t\r\n\tsimpleConstantsExample(1);\r\n\tsimpleConstantsExample(2);\r\n\tsimpleConstantsExample(3);\r\n\tsimpleConstantsExample(4);\r\n\t\/\/\u6211\u4eec\u53ef\u4ee5\u4f20\u9012\u4efb\u4f55int\u5e38\u91cf\r\n\tsimpleConstantsExample(5);\r\n}\r\n\r\nprivate static void simpleEnumExample(ThreadStates th) {\r\n\tif(th == ThreadStates.START) System.out.println(\"\u7ebf\u7a0b\u5df2\u542f\u52a8\");\r\n\telse if (th == ThreadStates.WAITING) System.out.println(\"\u7ebf\u7a0b\u6b63\u5728\u7b49\u5f85\");\r\n\telse if (th == ThreadStates.RUNNING) System.out.println(\"\u7ebf\u7a0b\u6b63\u5728\u8fd0\u884c\");\r\n\telse System.out.println(\"\u7ebf\u7a0b\u5df2\u7ec8\u6b62\");\r\n}\r\n\t\r\nprivate static void simpleConstantsExample(int i) {\r\n\tif(i == ThreadStatesConstant.START) System.out.println(\"\u7ebf\u7a0b\u5df2\u542f\u52a8\");\r\n\telse if (i == ThreadStatesConstant.WAITING) System.out.println(\"\u7ebf\u7a0b\u6b63\u5728\u7b49\u5f85\");\r\n\telse if (i == ThreadStatesConstant.RUNNING) System.out.println(\"\u7ebf\u7a0b\u6b63\u5728\u8fd0\u884c\");\r\n\telse System.out.println(\"\u7ebf\u7a0b\u5df2\u7ec8\u6b62\");\r\n}\r\n<\/code><\/pre>\n
\u5982\u679c\u6211\u4eec\u770b\u4e00\u4e0b\u4e0a\u9762\u7684\u4f8b\u5b50\uff0c\u6211\u4eec\u4f7f\u7528\u5e38\u91cf\u4f1a\u6709\u4e24\u4e2a\u98ce\u9669\uff0c\u800c\u4f7f\u7528\u679a\u4e3e\u53ef\u4ee5\u89e3\u51b3\u8fd9\u4e24\u4e2a\u98ce\u9669\u3002<\/p>\n
    \n
  1. \u6211\u4eec\u53ef\u4ee5\u5c06\u4efb\u4f55int\u5e38\u91cf\u4f20\u9012\u7ed9simpleConstantsExample\u65b9\u6cd5\uff0c\u4f46\u662f\u6211\u4eec\u53ea\u80fd\u4f20\u9012\u56fa\u5b9a\u503c\u7ed9simpleEnumExample\u65b9\u6cd5\uff0c\u56e0\u6b64\u5b83\u63d0\u4f9b\u4e86\u7c7b\u578b\u5b89\u5168\u6027\u3002<\/li>\n
  2. \u6211\u4eec\u53ef\u4ee5\u66f4\u6539ThreadStatesConstant\u7c7b\u4e2dint\u5e38\u91cf\u7684\u503c\uff0c\u4f46\u662f\u4ee5\u4e0a\u7a0b\u5e8f\u4e0d\u4f1a\u629b\u51fa\u4efb\u4f55\u5f02\u5e38\u3002\u6211\u4eec\u7684\u7a0b\u5e8f\u53ef\u80fd\u65e0\u6cd5\u6309\u9884\u671f\u5de5\u4f5c\uff0c\u4f46\u662f\u5982\u679c\u6211\u4eec\u66f4\u6539\u679a\u4e3e\u5e38\u91cf\uff0c\u5c06\u4f1a\u5f97\u5230\u7f16\u8bd1\u65f6\u9519\u8bef\uff0c\u4ece\u800c\u6d88\u9664\u4e86\u4efb\u4f55\u53ef\u80fd\u7684\u8fd0\u884c\u65f6\u95ee\u9898\u3002<\/li>\n<\/ol>\n
    Java \u679a\u4e3e\u65b9\u6cd5<\/h2>\n
    \u73b0\u5728\u8ba9\u6211\u4eec\u901a\u8fc7\u4e00\u4e2a\u4f8b\u5b50\u6765\u4e86\u89e3Java\u679a\u4e3e\u7684\u66f4\u591a\u7279\u6027\u3002<\/p>\n
    package com.Olivia.enums;\r\n\r\nimport java.io.Closeable;\r\nimport java.io.IOException;\r\n\r\n\/**\r\n * \u8fd9\u4e2a\u679a\u4e3e\u793a\u4f8b\u5c55\u793a\u4e86\u6211\u4eec\u53ef\u4ee5\u5bf9\u679a\u4e3e\u7c7b\u578b\u505a\u7684\u6240\u6709\u4e8b\u60c5\r\n *\r\n *\/\r\npublic enum ThreadStatesEnum implements Closeable{\r\n\tSTART(1){\r\n\t\t@Override\r\n\t\tpublic String toString(){\r\n\t\t\treturn \"START\u5b9e\u73b0\u3002\u4f18\u5148\u7ea7=\"+getPriority();\r\n\t\t}\r\n\r\n\t\t@Override\r\n\t\tpublic String getDetail() {\r\n\t\t\treturn \"START\";\r\n\t\t}\r\n\t},\r\n\tRUNNING(2){\r\n\t\t@Override\r\n\t\tpublic String getDetail() {\r\n\t\t\treturn \"RUNNING\";\r\n\t\t}\r\n\t},\r\n\tWAITING(3){\r\n\t\t@Override\r\n\t\tpublic String getDetail() {\r\n\t\t\treturn \"WAITING\";\r\n\t\t}\r\n\t},\r\n\tDEAD(4){\r\n\t\t@Override\r\n\t\tpublic String getDetail() {\r\n\t\t\treturn \"DEAD\";\r\n\t\t}\r\n\t};\r\n\t\r\n\tprivate int priority;\r\n\t\r\n\tpublic abstract String getDetail();\r\n\t\/\/\u679a\u4e3e\u6784\u9020\u51fd\u6570\u5e94\u8be5\u59cb\u7ec8\u662f\u79c1\u6709\u7684\r\n\tprivate ThreadStatesEnum(int i){\r\n\t\tpriority = i;\r\n\t}\r\n\t\r\n\t\/\/\u679a\u4e3e\u53ef\u4ee5\u6709\u65b9\u6cd5\r\n\tpublic int getPriority(){\r\n\t\treturn this.priority;\r\n\t}\r\n\t\r\n\tpublic void setPriority(int p){\r\n\t\tthis.priority = p;\r\n\t}\r\n\t\r\n\t\/\/\u679a\u4e3e\u53ef\u4ee5\u91cd\u5199\u51fd\u6570\r\n\t@Override\r\n\tpublic String toString(){\r\n\t\treturn \"\u9ed8\u8ba4ThreadStatesConstructors\u5b9e\u73b0\u3002\u4f18\u5148\u7ea7=\"+getPriority();\r\n\t}\r\n\r\n\t@Override\r\n\tpublic void close() throws IOException {\r\n\t\tSystem.out.println(\"\u679a\u4e3e\u7684\u5173\u95ed\u64cd\u4f5c\");\r\n\t}\r\n}\r\n<\/code><\/pre>\n
    Java\u679a\u4e3e\u7684\u91cd\u8981\u8981\u70b9<\/h2>\n
    \u8fd9\u662f\u6587\u7ae0\u300aJava\u4e2d\u7684\u679a\u4e3e\u300b\u7684\u7b2c2\u90e8\u5206\uff08\u51713\u90e8\u5206\uff09\u3002<\/p>\n
    Java\u4e2d\u7684\u679a\u4e3e\u91cd\u8981\u7279\u6027<\/h2>\n
      \n
    1. \u6240\u6709Java\u679a\u4e3e\u90fd\u9690\u5f0f\u5730\u7ee7\u627f\u81eajava.lang.Enum\u7c7b\uff0c\u8be5\u7c7b\u7ee7\u627f\u4e86Object\u7c7b\u5e76\u5b9e\u73b0\u4e86Serializable\u548cComparable\u63a5\u53e3\u3002\u56e0\u6b64\uff0c\u5728\u679a\u4e3e\u4e2d\u6211\u4eec\u4e0d\u80fd\u6269\u5c55\u4efb\u4f55\u7c7b\u3002<\/li>\n
    2. \u7531\u4e8eenum\u662f\u4e00\u4e2a\u5173\u952e\u5b57\uff0c\u6211\u4eec\u4e0d\u80fd\u4ee5\u5b83\u7ed3\u5c3e\u4f5c\u4e3a\u5305\u540d\uff0c\u4f8b\u5982com.Olivia.enum\u662f\u4e00\u4e2a\u65e0\u6548\u7684\u5305\u540d\u3002<\/li>\n
    3. \u679a\u4e3e\u53ef\u4ee5\u5b9e\u73b0\u63a5\u53e3\u3002\u5c31\u50cf\u4e0a\u9762\u7684\u679a\u4e3e\u793a\u4f8b\u4e2d\uff0c\u5b83\u5b9e\u73b0\u4e86Closeable\u63a5\u53e3\u3002<\/li>\n
    4. \u679a\u4e3e\u7684\u6784\u9020\u51fd\u6570\u603b\u662f\u79c1\u6709\u7684\u3002<\/li>\n
    5. \u6211\u4eec\u4e0d\u80fd\u4f7f\u7528new\u8fd0\u7b97\u7b26\u521b\u5efa\u679a\u4e3e\u7684\u5b9e\u4f8b\u3002<\/li>\n
    6. \u5728Java\u679a\u4e3e\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u58f0\u660e\u62bd\u8c61\u65b9\u6cd5\uff0c\u7136\u540e\u6240\u6709\u7684\u679a\u4e3e\u5b57\u6bb5\u5fc5\u987b\u5b9e\u73b0\u8fd9\u4e2a\u62bd\u8c61\u65b9\u6cd5\u3002\u5728\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\uff0cgetDetail()\u662f\u62bd\u8c61\u65b9\u6cd5\uff0c\u6240\u6709\u7684\u679a\u4e3e\u5b57\u6bb5\u90fd\u5b9e\u73b0\u4e86\u5b83\u3002<\/li>\n
    7. \u6211\u4eec\u53ef\u4ee5\u5728\u679a\u4e3e\u4e2d\u5b9a\u4e49\u65b9\u6cd5\uff0c\u679a\u4e3e\u5b57\u6bb5\u4e5f\u53ef\u4ee5\u91cd\u5199\u5b83\u4eec\u3002\u4f8b\u5982\uff0ctoString()\u65b9\u6cd5\u5728\u679a\u4e3e\u4e2d\u88ab\u5b9a\u4e49\uff0c\u679a\u4e3e\u5b57\u6bb5START\u5bf9\u5176\u8fdb\u884c\u4e86\u91cd\u5199\u3002<\/li>\n
    8. Java\u679a\u4e3e\u5b57\u6bb5\u5177\u6709\u547d\u540d\u7a7a\u95f4\uff0c\u6211\u4eec\u53ea\u80fd\u4f7f\u7528\u7c7b\u540d\u548c\u679a\u4e3e\u5b57\u6bb5\u4e00\u8d77\u4f7f\u7528\uff0c\u6bd4\u5982ThreadStates.START\u3002<\/li>\n
    9. \u679a\u4e3e\u53ef\u4ee5\u5728switch\u8bed\u53e5\u4e2d\u4f7f\u7528\uff0c\u6211\u4eec\u5c06\u5728\u672c\u6559\u7a0b\u7684\u540e\u9762\u90e8\u5206\u770b\u5230\u5b83\u7684\u4f7f\u7528\u3002<\/li>\n
    10. \u6211\u4eec\u53ef\u4ee5\u6269\u5c55\u73b0\u6709\u7684\u679a\u4e3e\u800c\u4e0d\u7834\u574f\u4efb\u4f55\u73b0\u6709\u7684\u529f\u80fd\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u4ee5\u5728ThreadStates\u679a\u4e3e\u4e2d\u6dfb\u52a0\u4e00\u4e2a\u65b0\u7684\u5b57\u6bb5NEW\uff0c\u800c\u4e0d\u5f71\u54cd\u4efb\u4f55\u73b0\u6709\u7684\u529f\u80fd\u3002<\/li>\n
    11. \u7531\u4e8e\u679a\u4e3e\u5b57\u6bb5\u662f\u5e38\u91cf\uff0cJava\u7684\u6700\u4f73\u5b9e\u8df5\u662f\u7528\u5927\u5199\u5b57\u6bcd\u548c\u4e0b\u5212\u7ebf\u4ee3\u66ff\u7a7a\u683c\u8fdb\u884c\u547d\u540d\u3002\u4f8b\u5982EAST\uff0cWEST\uff0cEAST_DIRECTION\u7b49\u3002<\/li>\n
    12. \u679a\u4e3e\u5e38\u91cf\u9690\u5f0f\u5730\u662f\u9759\u6001\u548c\u6700\u7ec8\u7684\u3002<\/li>\n
    13. \u679a\u4e3e\u5e38\u91cf\u662f\u6700\u7ec8\u7684\uff0c\u4f46\u5b83\u7684\u53d8\u91cf\u4ecd\u7136\u53ef\u4ee5\u88ab\u4fee\u6539\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528setPriority()\u65b9\u6cd5\u6765\u66f4\u6539\u679a\u4e3e\u5e38\u91cf\u7684\u4f18\u5148\u7ea7\u3002\u6211\u4eec\u5c06\u5728\u4e0b\u9762\u7684\u4f8b\u5b50\u4e2d\u770b\u5230\u5b83\u7684\u4f7f\u7528\u3002<\/li>\n
    14. \u7531\u4e8e\u679a\u4e3e\u5e38\u91cf\u662f\u6700\u7ec8\u7684\uff0c\u6211\u4eec\u53ef\u4ee5\u5b89\u5168\u5730\u4f7f\u7528”==”\u548cequals()\u65b9\u6cd5\u8fdb\u884c\u6bd4\u8f83\u3002\u4e24\u8005\u5c06\u5f97\u5230\u76f8\u540c\u7684\u7ed3\u679c\u3002<\/li>\n<\/ol>\n
      Java\u679a\u4e3e\u7684\u76f8\u5173\u529f\u80fd<\/h2>\n
      \u5728Java\u4e2d\uff0c\u4e0e\u679a\u4e3e\u76f8\u5173\u7684\u91cd\u8981\u529f\u80fd\u5305\u62ecEnumSet\u3001EnumMap\u548cvalueOf()\u65b9\u6cd5\u3002\u8fd9\u4e9b\u529f\u80fd\u4e3a\u679a\u4e3e\u7c7b\u578b\u63d0\u4f9b\u4e86\u66f4\u591a\u7684\u64cd\u4f5c\u65b9\u5f0f\u548c\u7075\u6d3b\u6027\u3002<\/p>\n
      \u8fd9\u662f\u6587\u7ae0\u300aJava\u4e2d\u7684\u679a\u4e3e\u300b\u7684\u7b2c3\u90e8\u5206\uff08\u51713\u90e8\u5206\uff09\u3002<\/p>\n
      \u5185\u5bb9\u7247\u6bb5\uff1a\u73b0\u5728\u6211\u4eec\u5df2\u7ecf\u4e86\u89e3\u4e86Enum\u7684\u5927\u591a\u6570\u7279\u6027\uff0c\u63a5\u4e0b\u6765\u8ba9\u6211\u4eec\u770b\u4e00\u4e0bJava\u7684\u679a\u4e3e\u793a\u4f8b\u7a0b\u5e8f\u3002\u7136\u540e\u6211\u4eec\u5c06\u5b66\u4e60\u4e00\u4e9b\u679a\u4e3e\u7c7b\u578b\u7684\u66f4\u591a\u7279\u6027\u3002<\/p>\n
      package com.Olivia.enums;\r\n\r\nimport java.io.IOException;\r\nimport java.util.EnumMap;\r\nimport java.util.EnumSet;\r\nimport java.util.Set;\r\n\r\npublic class JavaEnumExamples {\r\n\r\n\tpublic static void main(String[] args) throws IOException {\r\n\t\t\t\t\r\n\t\tusingEnumMethods();\r\n\t\t\r\n\t\tusingEnumValueOf();\r\n\t\t\r\n\t\tusingEnumValues();\r\n\t\t\r\n\t\tusingEnumInSwitch(ThreadStatesEnum.START);\r\n\t\tusingEnumInSwitch(ThreadStatesEnum.DEAD);\r\n\t\t\r\n\t\tusingEnumMap();\r\n\t\t\r\n\t\tusingEnumSet();\r\n\t\t\r\n\t}\r\n\r\n\tprivate static void usingEnumSet() {\r\n\t\tEnumSet enumSet = EnumSet.allOf(ThreadStatesEnum.class);\r\n\t\tfor(ThreadStatesEnum tsenum : enumSet){\r\n\t\t\tSystem.out.println(\"Using EnumSet, priority = \"+tsenum.getPriority());\r\n\t\t}\r\n\t}\r\n\r\n\tprivate static void usingEnumMap() {\r\n\t\tEnumMap<ThreadStatesEnum, String> enumMap = new EnumMap<ThreadStatesEnum,String>(ThreadStatesEnum.class);\r\n\t\tenumMap.put(ThreadStatesEnum.START, \"Thread is started\");\r\n\t\tenumMap.put(ThreadStatesEnum.RUNNING, \"Thread is running\");\r\n\t\tenumMap.put(ThreadStatesEnum.WAITING, \"Thread is waiting\");\r\n\t\tenumMap.put(ThreadStatesEnum.DEAD, \"Thread is dead\");\r\n\t\t\r\n\t\tSet keySet = enumMap.keySet();\r\n\t\tfor(ThreadStatesEnum key : keySet){\r\n\t\t\tSystem.out.println(\"key=\"+key.toString()+\":: value=\"+enumMap.get(key));\r\n\t\t}\r\n\t\t\r\n\t}\r\n\r\n\tprivate static void usingEnumInSwitch(ThreadStatesEnum th) {\r\n\t\tswitch (th){\r\n\t\tcase START:\r\n\t\t\tSystem.out.println(\"START thread\");\r\n\t\t\tbreak;\r\n\t\tcase WAITING:\r\n\t\t\tSystem.out.println(\"WAITING thread\");\r\n\t\t\tbreak;\r\n\t\tcase RUNNING:\r\n\t\t\tSystem.out.println(\"RUNNING thread\");\r\n\t\t\tbreak;\r\n\t\tcase DEAD:\r\n\t\t\tSystem.out.println(\"DEAD thread\");\r\n\t\t}\r\n\t}\r\n\r\n\tprivate static void usingEnumValues() {\r\n\t\tThreadStatesEnum[] thArray = ThreadStatesEnum.values();\r\n\t\t\r\n\t\tfor(ThreadStatesEnum th : thArray){\r\n\t\t\tSystem.out.println(th.toString() + \"::priority=\"+th.getPriority());\r\n\t\t}\r\n\t}\r\n\r\n\tprivate static void usingEnumValueOf() {\r\n\t\tThreadStatesEnum th = Enum.valueOf(ThreadStatesEnum.class, \"START\");\r\n\t\tSystem.out.println(\"th priority=\"+th.getPriority());\r\n\t}\r\n\r\n\tprivate static void usingEnumMethods() throws IOException {\r\n\t\tThreadStatesEnum thc = ThreadStatesEnum.DEAD;\r\n\t\tSystem.out.println(\"priority is:\"+thc.getPriority());\r\n\t\t\r\n\t\tthc = ThreadStatesEnum.DEAD;\r\n\t\tSystem.out.println(\"Using overriden method.\"+thc.toString());\r\n\t\t\r\n\t\tthc = ThreadStatesEnum.START;\r\n\t\tSystem.out.println(\"Using overriden method.\"+thc.toString());\r\n\t\tthc.setPriority(10);\r\n\t\tSystem.out.println(\"Enum Constant variable changed priority value=\"+thc.getPriority());\r\n\t\tthc.close();\r\n\t}\r\n\r\n}\r\n<\/code><\/pre>\n
      \u5728\u89e3\u91ca\u679a\u4e3e\u7684\u5176\u4ed6\u91cd\u8981\u7279\u6027\u4e4b\u524d\uff0c\u8ba9\u6211\u4eec\u5148\u770b\u4e00\u4e0b\u4e0a\u8ff0\u7a0b\u5e8f\u7684\u8f93\u51fa\u7ed3\u679c\u3002<\/p>\n
      priority is:4\r\nUsing overriden method.Default ThreadStatesConstructors implementation. Priority=4\r\nUsing overriden method.START implementation. Priority=1\r\nEnum Constant variable changed priority value=10\r\nClose of Enum\r\nth priority=10\r\nSTART implementation. Priority=10::priority=10\r\nDefault ThreadStatesConstructors implementation. Priority=2::priority=2\r\nDefault ThreadStatesConstructors implementation. Priority=3::priority=3\r\nDefault ThreadStatesConstructors implementation. Priority=4::priority=4\r\nSTART thread\r\nDEAD thread\r\nkey=START:: value=Thread is started\r\nkey=RUNNING:: value=Thread is running\r\nkey=WAITING:: value=Thread is waiting\r\nkey=DEAD:: value=Thread is dead\r\nUsing EnumSet, priority = 10\r\nUsing EnumSet, priority = 2\r\nUsing EnumSet, priority = 3\r\nUsing EnumSet, priority = 4\r\n<\/code><\/pre>\n
      \u91cd\u8981\u8981\u70b9<\/h2>\n
        \n
      1. \u4f7f\u7528usingEnumMethods()\u65b9\u6cd5\u5c55\u793a\u4e86\u5982\u4f55\u521b\u5efa\u679a\u4e3e\u5bf9\u8c61\u4ee5\u53ca\u5982\u4f55\u4f7f\u7528\u5176\u65b9\u6cd5\u3002\u5b83\u8fd8\u5c55\u793a\u4e86\u4f7f\u7528setPriority(int i)\u65b9\u6cd5\u6765\u66f4\u6539\u679a\u4e3e\u53d8\u91cf\u7684\u793a\u4f8b\u3002<\/li>\n
      2. usingEnumValueOf()\u901a\u8fc7java.util.Enum valueOf(enumType, name)\u5c55\u793a\u4e86\u5982\u4f55\u4f7f\u7528\u5b57\u7b26\u4e32\u521b\u5efa\u679a\u4e3e\u5bf9\u8c61\u3002\u5982\u679c\u6307\u5b9a\u7684\u679a\u4e3e\u7c7b\u578b\u6ca1\u6709\u6307\u5b9a\u540d\u79f0\u7684\u5e38\u91cf\uff0c\u6216\u8005\u6307\u5b9a\u7684\u7c7b\u5bf9\u8c61\u4e0d\u4ee3\u8868\u679a\u4e3e\u7c7b\u578b\uff0c\u5219\u4f1a\u629b\u51faIllegalArgumentException\u3002\u5982\u679c\u4efb\u4f55\u53c2\u6570\u4e3a\u7a7a\uff0c\u8fd8\u4f1a\u629b\u51faNullPointerException\u3002<\/li>\n
      3. usingEnumValues()\u65b9\u6cd5\u5c55\u793a\u4e86values()\u65b9\u6cd5\u7684\u4f7f\u7528\uff0c\u8be5\u65b9\u6cd5\u8fd4\u56de\u6309\u58f0\u660e\u987a\u5e8f\u5305\u542b\u6240\u6709\u679a\u4e3e\u503c\u7684\u6570\u7ec4\u3002\u8bf7\u6ce8\u610f\uff0c\u6b64\u65b9\u6cd5\u662fJava\u7f16\u8bd1\u5668\u81ea\u52a8\u751f\u6210\u7684\uff0c\u9002\u7528\u4e8e\u6bcf\u4e2a\u679a\u4e3e\u3002\u60a8\u5728java.util.Enum\u7c7b\u4e2d\u627e\u4e0d\u5230values()\u7684\u5b9e\u73b0\u3002<\/li>\n
      4. usingEnumInSwitch()\u65b9\u6cd5\u5c55\u793a\u4e86\u5982\u4f55\u5728switch case\u8bed\u53e5\u4e2d\u4f7f\u7528\u679a\u4e3e\u5e38\u91cf\u3002<\/li>\n
      5. usingEnumMap()\u65b9\u6cd5\u5c55\u793a\u4e86java.util.EnumMap\u7684\u4f7f\u7528\uff0c\u5b83\u662f\u5728Java 1.5\u96c6\u5408\u6846\u67b6\u4e2d\u5f15\u5165\u7684\u3002EnumMap\u662f\u7528\u4e8e\u4e0e\u679a\u4e3e\u7c7b\u578b\u952e\u4e00\u8d77\u4f7f\u7528\u7684Map\u5b9e\u73b0\u3002\u679a\u4e3e\u6620\u5c04\u4e2d\u7684\u6240\u6709\u952e\u90fd\u5fc5\u987b\u6765\u81ea\u4e8e\u5728\u521b\u5efa\u6620\u5c04\u65f6\u6307\u5b9a\u7684\u5355\u4e2a\u679a\u4e3e\u7c7b\u578b\uff0c\u65e0\u8bba\u662f\u663e\u5f0f\u8fd8\u662f\u9690\u5f0f\u3002\u6211\u4eec\u4e0d\u80fd\u5c06null\u7528\u4f5cEnumMap\u7684\u952e\uff0c\u800c\u4e14EnumMap\u4e0d\u662f\u540c\u6b65\u7684\u3002<\/li>\n
      6. usingEnumSet()\u65b9\u6cd5\u5c55\u793a\u4e86java.util.EnumSet\u7684\u4f7f\u7528\uff0c\u5b83\u662f\u7528\u4e8e\u679a\u4e3e\u7c7b\u578b\u7684Set\u5b9e\u73b0\u3002\u679a\u4e3e\u96c6\u4e2d\u7684\u6240\u6709\u5143\u7d20\u5fc5\u987b\u6765\u81ea\u4e8e\u5728\u521b\u5efa\u96c6\u5408\u65f6\u6307\u5b9a\u7684\u5355\u4e2a\u679a\u4e3e\u7c7b\u578b\uff0c\u65e0\u8bba\u662f\u663e\u5f0f\u8fd8\u662f\u9690\u5f0f\u3002EnumSet\u4e0d\u662f\u540c\u6b65\u7684\uff0c\u4e5f\u4e0d\u5141\u8bb8\u7a7a\u5143\u7d20\u3002\u5b83\u8fd8\u63d0\u4f9b\u4e86\u4e00\u4e9b\u6709\u7528\u7684\u65b9\u6cd5\uff0c\u5982copyOf(Collection c)\u3001of(E first, E… rest)\u548ccomplementOf(EnumSet s)\u3002<\/li>\n<\/ol>\n
        \u60a8\u53ef\u4ee5\u67e5\u770b\u6211\u4eecGitHub\u8d44\u6599\u5e93\u4e2d\u7684\u6240\u6709\u793a\u4f8b\u3002<\/p>\n
        \u53c2\u8003\uff1aOracle\u6587\u6863<\/p>\n","protected":false},"excerpt":{"rendered":"
        \u8fd9\u662f\u6587\u7ae0\u300aJava\u4e2d\u7684\u679a\u4e3e\u300b\u7684\u7b2c1\u90e8\u5206\uff08\u51713\u90e8\u5206\uff09\u3002 \u5185\u5bb9\u7247\u6bb5: \u5728Java 1.5\u4e2d\u5f15\u5165\u4e86\u679a\u4e3e\u4f5c\u4e3a\u4e00\u79cd\u65b0\u7684\u7c7b […]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[1200,1198,1199],"class_list":["post-362","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-java"],"yoast_head":"\nJava\u679a\u4e3e\u5b8c\u5168\u6307\u5357\uff1a\u4ece\u5165\u95e8\u5230\u7cbe\u901a\u7684\u5b9e\u4f8b\u8be6\u89e3 - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u6df1\u5165\u89e3\u6790Java\u679a\u4e3e\u7c7b\u578b\u7684\u5b9a\u4e49\u3001\u7528\u6cd5\u548c\u5e94\u7528\u573a\u666f\u3002\u901a\u8fc7\u5b9e\u4f8b\u4ee3\u7801\u8be6\u7ec6\u8bb2\u89e3\u679a\u4e3e\u7684\u58f0\u660e\u3001\u65b9\u6cd5\u3001\u904d\u5386\u53ca\u9ad8\u7ea7\u7279\u6027\uff0c\u5e2e\u52a9\u5f00\u53d1\u8005\u5168\u9762\u638c\u63e1Java\u679a\u4e3e\u7f16\u7a0b\u6280\u5de7\uff0c\u63d0\u5347\u4ee3\u7801\u8d28\u91cf\u4e0e\u5f00\u53d1\u6548\u7387\u3002\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/java\u4e2d\u7684\u679a\u4e3e\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Java\u679a\u4e3e\u5b8c\u5168\u6307\u5357\uff1a\u4ece\u5165\u95e8\u5230\u7cbe\u901a\u7684\u5b9e\u4f8b\u8be6\u89e3\" \/>\n<meta property=\"og:description\" content=\"\u6df1\u5165\u89e3\u6790Java\u679a\u4e3e\u7c7b\u578b\u7684\u5b9a\u4e49\u3001\u7528\u6cd5\u548c\u5e94\u7528\u573a\u666f\u3002\u901a\u8fc7\u5b9e\u4f8b\u4ee3\u7801\u8be6\u7ec6\u8bb2\u89e3\u679a\u4e3e\u7684\u58f0\u660e\u3001\u65b9\u6cd5\u3001\u904d\u5386\u53ca\u9ad8\u7ea7\u7279\u6027\uff0c\u5e2e\u52a9\u5f00\u53d1\u8005\u5168\u9762\u638c\u63e1Java\u679a\u4e3e\u7f16\u7a0b\u6280\u5de7\uff0c\u63d0\u5347\u4ee3\u7801\u8d28\u91cf\u4e0e\u5f00\u53d1\u6548\u7387\u3002\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/java\u4e2d\u7684\u679a\u4e3e\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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