{"id":861,"date":"2018-07-20T08:59:37","date_gmt":"2018-07-20T00:59:37","guid":{"rendered":"https:\/\/blog.jsjs.org\/?p=861"},"modified":"2018-07-20T08:59:37","modified_gmt":"2018-07-20T00:59:37","slug":"%e3%80%90jvm%e3%80%91jvm%e7%b3%bb%e5%88%97%e4%b9%8b%e7%b1%bb%e5%8a%a0%e8%bd%bd%e6%9c%ba%e5%88%b6%ef%bc%88%e5%9b%9b%ef%bc%89","status":"publish","type":"post","link":"https:\/\/blog.jsjs.org\/?p=861","title":{"rendered":"\u3010JVM\u3011JVM\u7cfb\u5217\u4e4b\u7c7b\u52a0\u8f7d\u673a\u5236\uff08\u56db\uff09"},"content":{"rendered":"

\u4e00\u3001\u524d\u8a00<\/strong><\/p>\n

\u524d\u9762\u5206\u6790\u4e86class\u6587\u4ef6\u5177\u4f53\u542b\u4e49\uff0c\u63a5\u7740\u9700\u8981\u5c06class\u6587\u4ef6\u52a0\u8f7d\u5230\u865a\u62df\u673a\u4e2d\uff0c\u8fd9\u4e2a\u8fc7\u7a0b\u662f\u600e\u6837\u7684\u5462\uff0c\u4e0b\u9762\uff0c\u6211\u4eec\u6765\u4ed4\u7ec6\u5206\u6790\u3002<\/p>\n

\u4e8c\u3001\u4ec0\u4e48\u662f\u7c7b\u52a0\u8f7d\u673a\u5236<\/strong><\/p>\n

\u628aclass\u6587\u4ef6\u52a0\u8f7d\u5230\u5185\u5b58\uff0c\u5e76\u5bf9\u6570\u636e\u8fdb\u884c\u6821\u9a8c\u3001\u8f6c\u6362\u89e3\u6790\u548c\u521d\u59cb\u5316\uff0c\u6700\u7ec8\u5f62\u6210\u53ef\u4ee5\u88ab\u865a\u62df\u673a\u76f4\u63a5\u4f7f\u7528\u7684Java\u7c7b\u578b\uff0c\u8fd9\u5c31\u662f\u7c7b\u52a0\u8f7d\u673a\u5236\u3002<\/p>\n

\u4e09\u3001\u7c7b\u52a0\u8f7d\u603b\u4f53\u6d41\u7a0b\u56fe<\/strong><\/p>\n

\"\"<\/p>\n

\u8bf4\u660e\uff1a\u7c7b\u7684\u6574\u4e2a\u751f\u547d\u5468\u671f\u5206\u4e3a\u4ee5\u4e0a\u4e03\u4e2a\u9636\u6bb5\uff0c\u9a8c\u8bc1\u3001\u51c6\u5907\u3001\u89e3\u6790\u7edf\u79f0\u4e3a\u8fde\u63a5\u9636\u6bb5\u3002\u5173\u4e8e\u52a0\u8f7d\u6d41\u7a0b\u7b14\u8005\u4e4b\u524d\u4e5f\u5199\u8fc7\u4e00\u7bc7\u6587\u7ae0JVM\u4e4b\u7c7b\u52a0\u8f7d\u5668<\/a>\uff0c\u4ece\u4ee3\u7801\u5c42\u9762\u4e86\u89e3\u7c7b\u52a0\u8f7d\u673a\u5236\u3002\u4e0b\u9762\u6211\u4eec\u5c06\u66f4\u52a0\u8be6\u7ec6\u7684\u8bb2\u89e3\u5404\u4e2a\u9636\u6bb5\uff0c\u52a0\u8f7d\u9636\u6bb5\u53ea\u662f\u7c7b\u52a0\u8f7d\u7684\u4e00\u4e2a\u6b65\u9aa4\uff0c\u7c7b\u52a0\u8f7d\u5305\u62ec\u4ee5\u4e0a\u7684\u4e03\u4e2a\u6b65\u9aa4\u3002<\/p>\n

\u56db\u3001\u4f55\u65f6\u8fdb\u884c\u7c7b\u52a0\u8f7d<\/strong><\/p>\n

\u52a0\u865a\u62df\u673a\u89c4\u8303\u89c4\u5b9a\u4e86\u5982\u4e0b\u51e0\u79cd\u60c5\u51b5\u5c31\u5fc5\u987b\u8981\u8fdb\u884c\u521d\u59cb\u5316\uff08\u5f00\u59cb\u7c7b\u52a0\u8f7d\uff09\u3002<\/p>\n

1.\u00a0 \u9047\u5230new\u3001getstatic\u3001putstatic\u3001invokestatic\u6307\u4ee4\u65f6\uff0c\u5bf9\u5e94\u5230\u7a0b\u5e8f\u4e2d\u5c31\u662f\u4f7f\u7528\u5230new\u5b9e\u4f8b\u5316\u5bf9\u8c61\u65f6\u3001\u8bfb\u53d6\u6216\u8bbe\u7f6e\u7c7b\u9759\u6001\u5b57\u6bb5\u65f6\uff08\u975efinal\uff09\u3001\u8c03\u7528\u9759\u6001\u65b9\u6cd5\u65f6\u3002\u9700\u8981\u8fdb\u884c\u521d\u59cb\u5316\u3002<\/p>\n

2. \u4f7f\u7528java.lang.reflect\u5305\u7684\u65b9\u6cd5\u5bf9\u7c7b\u8fdb\u884c\u53cd\u5c04\u8c03\u7528\u65f6\uff0c\u9700\u8981\u8fdb\u884c\u521d\u59cb\u5316\u3002<\/p>\n

3. \u4f7f\u7528\u4e00\u4e2a\u7c7b\u65f6\uff0c\u82e5\u5176\u7236\u7c7b\u8fd8\u672a\u521d\u59cb\u5316\uff0c\u5219\u9700\u5148\u521d\u59cb\u5316\u5176\u7236\u7c7b\u3002<\/p>\n

4. \u865a\u62df\u673a\u542f\u52a8\u65f6\uff0c\u5305\u542bmain\u65b9\u6cd5\u7684\u7c7b\uff0c\u865a\u62df\u673a\u4f1a\u5c06\u5176\u521d\u59cb\u5316\u3002<\/p>\n

5. java.lang.invoke.MethodHandle\u5b9e\u4f8b\u6700\u540e\u7684\u89e3\u6790\u7ed3\u679cREF_getStatic\u3001REF_putStatic\u3001REF_invokeStatic\u65b9\u6cd5\u53e5\u67c4\uff0c\u5e76\u4e14\u8fd9\u4e2a\u65b9\u6cd5\u53e5\u67c4\u5bf9\u5e94\u7684\u7c7b\u6ca1\u6709\u8fdb\u884c\u521d\u59cb\u5316\uff0c\u5219\u9700\u8981\u5148\u8fdb\u884c\u521d\u59cb\u5316\u3002<\/p>\n

\u4ee5\u4e0a\u4e94\u79cd\u60c5\u51b5\u79f0\u4e3a\u4e3b\u52a8\u4f7f\u7528\uff0c\u5176\u4ed6\u7684\u60c5\u51b5\u5747\u79f0\u4e3a\u88ab\u52a8\u4f7f\u7528\uff0c\u88ab\u52a8\u4f7f\u7528\u4e0d\u4f1a\u5bfc\u81f4\u521d\u59cb\u5316\u3002<\/p>\n

\u4e94\u3001\u521d\u59cb\u5316\u793a\u4f8b\u8bf4\u660e<\/strong><\/p>\n

1. \u5bf9\u4e8e\u7c7b\u800c\u8a00\uff0c\u4f7f\u7528\u7236\u7c7b\u7684\u9759\u6001\u5b57\u6bb5\uff08\u975efinal\uff09\u4e0d\u4f1a\u5bfc\u81f4\u5b50\u7c7b\u7684\u521d\u59cb\u5316\u3002<\/p>\n

\"\"<\/p>\n
\n
\"\u590d\u5236\u4ee3\u7801\"<\/a><\/span><\/div>\n
class SuperClass {\n    static {\n        System.out.println(\"super\");\n    }\n\n    public static final int value = 123;\n}\n\nclass SubClass extends SuperClass {\n    static {\n        System.out.println(\"sub\");\n    }\n}\n\npublic class TestInit {\n    public static void main(String[] args) {\n        System.out.println(SubClass.value);\n    }\n}<\/pre>\n
\"\u590d\u5236\u4ee3\u7801\"<\/a><\/span><\/div>\n<\/div>\n<\/div>\n
\u7ed3\u679c\uff1a<\/p>\n
super
\n123<\/p>\n
\u8bf4\u660e\uff1a\u5e76\u6ca1\u6709\u521d\u59cb\u5316\u5b50\u7c7b\uff0c\u867d\u7136\u4f7f\u7528SubClass.value\uff0c\u4f46\u5b9e\u9645\u4f7f\u7528\u7684\u662f\u5b50\u7c7b\u7ee7\u627f\u7236\u7c7b\u7684\u9759\u6001\u5b57\u6bb5\uff0c\u4e0d\u4f1a\u521d\u59cb\u5316SubClass\u3002\u5373\u53ea\u6709\u76f4\u63a5\u5b9a\u4e49\u4e86\u8fd9\u4e2a\u5b57\u6bb5\u7684\u7c7b\u624d\u4f1a\u88ab\u521d\u59cb\u5316\u3002<\/p>\n
2. \u5bf9\u4e8e\u7c7b\u6216\u63a5\u53e3\u800c\u8a00\uff0c\u4f7f\u7528\u5176\u5e38\u91cf\u5b57\u6bb5(final\u3001static)\u4e0d\u4f1a\u5bfc\u81f4\u5176\u521d\u59cb\u5316\u3002<\/p>\n
\"\"<\/p>\n
\n
\"\u590d\u5236\u4ee3\u7801\"<\/a><\/span><\/div>\n
class SuperClass {\n    static {\n        System.out.println(\"super\");\n    }\n\n    public final static int value = 123;\n}\n\npublic class TestInit {\n    public static void main(String[] args) {\n        System.out.println(SuperClass.value);\n    }\n}<\/pre>\n
\"\u590d\u5236\u4ee3\u7801\"<\/a><\/span><\/div>\n<\/div>\n<\/div>\n
\u7ed3\u679c\uff1a<\/p>\n
123<\/p>\n
\u8bf4\u660e\uff1a\u4f7f\u7528\u5e38\u91cf\u5e76\u4e0d\u4f1a\u5bfc\u81f4\u7c7b\u6216\u63a5\u53e3\u7684\u5e38\u91cf\u5e76\u4e0d\u4f1a\u5bfc\u81f4\u7c7b\u6216\u63a5\u53e3\u7684\u521d\u59cb\u5316\u3002\u56e0\u4e3a\u5e38\u91cf\u5728\u7f16\u8bd1\u65f6\u8fdb\u884c\u4f18\u5316\uff0c\u76f4\u63a5\u5d4c\u5165\u5728TestInit.class\u6587\u4ef6\u7684\u5b57\u8282\u7801\u4e2d\u3002<\/p>\n
3. \u5bf9\u4e8e\u7c7b\u800c\u8a00\uff0c\u521d\u59cb\u5316\u5b50\u7c7b\u4f1a\u5bfc\u81f4\u7236\u7c7b(\u4e0d\u5305\u62ec\u63a5\u53e3)\u7684\u521d\u59cb\u5316\u3002<\/p>\n
\"\"<\/p>\n
\n
\"\u590d\u5236\u4ee3\u7801\"<\/a><\/span><\/div>\n
class SuperClass {\n    static {\n        System.out.println(\"super\");\n    }\n\n    public final static int value = 123;\n}\n\nclass SubClass extends SuperClass {\n    public static int i = 3;\n    static {\n        System.out.println(\"sub\");\n    }\n}\npublic class TestInit {\n    public static void main(String[] args) {\n        System.out.println(SubClass.i);\n    }\n}<\/pre>\n
\"\u590d\u5236\u4ee3\u7801\"<\/a><\/span><\/div>\n<\/div>\n<\/div>\n
\u7ed3\u679c\uff1a<\/p>\n
super
\nsub
\n3<\/p>\n
\u8bf4\u660e\uff1a\u521d\u59cb\u5316\u5b50\u7c7b\u4f1a\u5bfc\u81f4\u7236\u7c7b\u7684\u521d\u59cb\u5316\uff0c\u5e76\u4e14\u7236\u7c7b\u7684\u521d\u59cb\u5316\u5728\u5b50\u7c7b\u521d\u59cb\u5316\u7684\u524d\u9762\u3002<\/p>\n
4. \u5bf9\u4e8e\u63a5\u53e3\u800c\u8a00\uff0c\u521d\u59cb\u5316\u5b50\u63a5\u53e3\u4e0d\u4f1a\u5bfc\u81f4\u7236\u63a5\u53e3\u7684\u521d\u59cb\u5316\uff0c\u53ea\u6709\u5728\u771f\u6b63\u4f7f\u7528\u5230\u7236\u63a5\u53e3\u7684\u65f6\u5019(\u5982\u4f7f\u7528\u7236\u63a5\u53e3\u4e2d\u5b9a\u4e49\u7684\u5e38\u91cf)\uff0c\u624d\u4f1a\u521d\u59cb\u5316\u3002<\/p>\n
\u516d\u3001\u52a0\u8f7d<\/strong><\/p>\n
\u52a0\u8f7d\u9636\u6bb5\u865a\u62df\u673a\u9700\u8981\u5b8c\u6210\u5982\u4e0b\u4e8b\u60c5\u3002<\/p>\n
1. \u901a\u8fc7\u7c7b\u7684\u5168\u9650\u5b9a\u540d\u6765\u83b7\u53d6\u6b64\u7c7b\u7684\u4e8c\u8fdb\u5236\u5b57\u8282\u6d41\u3002<\/p>\n
2. \u5c06\u4e8c\u8fdb\u5236\u5b57\u8282\u6d41\u6240\u4ee3\u8868\u7684\u9759\u6001\u5b58\u50a8\u7ed3\u6784\u8f6c\u5316\u4e3a\u65b9\u6cd5\u533a\u7684\u8fd0\u884c\u65f6\u6570\u636e\u7ed3\u6784\u3002<\/p>\n
3. \u521b\u5efa\u4e00\u4e2a\u4ee3\u8868\u5e26\u8be5\u7684java.lang.Class\u5bf9\u8c61\uff0c\u4f5c\u4e3a\u65b9\u6cd5\u533a\u8fd9\u4e2a\u7c7b\u7684\u5404\u79cd\u6570\u636e\u7684\u8bbf\u95ee\u5165\u53e3\u3002<\/p>\n
\u7528\u6237\u53ef\u4ee5\u81ea\u5b9a\u4e49\u7c7b\u52a0\u8f7d\u5668(\u91cd\u5199loadClass\u65b9\u6cd5)\u83b7\u53d6\u4e8c\u8fdb\u5236\u5b57\u8282\u6d41\u3002\u5bf9\u4e8e\u6570\u7ec4\u7c7b\u800c\u8a00\uff0c\u6570\u7ec4\u7c7b\u7531java\u865a\u62df\u673a\u76f4\u63a5\u521b\u5efa\uff0c\u4e0d\u901a\u8fc7\u7c7b\u52a0\u8f7d\u5668\u521b\u5efa\u3002\u6570\u7ec4\u7c7b\u7684\u521b\u5efa\u8fc7\u7a0b\u5982\u4e0b\uff1a<\/p>\n
\u2460\u5982\u679c\u6570\u7ec4\u5143\u7d20\u7c7b\u578b\u662f\u5f15\u7528\u7c7b\u578b\uff0c\u5c31\u91c7\u7528\u53cc\u4eb2\u59d4\u6d3e\u6a21\u578b\u8fdb\u884c\u52a0\u8f7d(\u4e4b\u540e\u4f1a\u4ecb\u7ecd)\uff0c\u6570\u7ec4\u7c7b\u5c06\u5728\u52a0\u8f7d\u8be5\u5143\u7d20\u7c7b\u578b\u7684\u7c7b\u540d\u79f0\u7a7a\u95f4\u4e0a\u88ab\u6807\u8bc6\u3002<\/p>\n
\u2461\u5982\u679c\u6570\u7ec4\u5143\u7d20\u7c7b\u578b\u4e3a\u57fa\u672c\u7c7b\u578b\uff0c\u6570\u7ec4\u7c7b\u88ab\u6807\u8bb0\u4e3a\u4e0e\u5f15\u5bfc\u7c7b\u52a0\u8f7d\u5668\u5173\u8054\u3002<\/p>\n
\u2462\u6570\u7ec4\u7c7b\u7684\u53ef\u89c1\u6027\u4e0e\u5176\u5143\u7d20\u7c7b\u578b\u53ef\u89c1\u6027\u4e00\u81f4\uff0c\u5982\u679c\u5143\u7d20\u7c7b\u578b\u4e0d\u662f\u5f15\u7528\u7c7b\u578b\uff0c\u90a3\u6570\u7ec4\u7c7b\u7684\u53ef\u89c1\u6027\u9ed8\u8ba4\u4e3apublic\u3002<\/p>\n
\u521b\u5efa\u7684Class\u5bf9\u8c61\u5728\u65b9\u6cd5\u533a\u4e2d\u3002\u5bf9\u8c61\u7edd\u5927\u591a\u6570\u653e\u5728\u5806\u4e2d\uff0cClass\u5bf9\u8c61\u662f\u4e00\u4e2a\u4f8b\u5916\u3002<\/p>\n
\u4e03\u3001\u8fde\u63a5<\/strong><\/p>\n
7.1 \u9a8c\u8bc1<\/p>\n
\u6b64\u9636\u6bb5\u662f\u786e\u4fddclass\u6587\u4ef6\u7684\u5b57\u8282\u6d41\u5305\u542b\u7684\u4fe1\u606f\u7b26\u5408\u865a\u62df\u673a\u7684\u8981\u6c42\u3002\u4e3b\u8981\u4f1a\u8fdb\u884c\u5982\u4e0b\u7684\u9a8c\u8bc1\u3002<\/p>\n
1. \u6587\u4ef6\u683c\u5f0f\u9a8c\u8bc1<\/p>\n
\u9a8c\u8bc1\u5b57\u8282\u6d41\u662f\u5426\u7b26\u5408Class\u6587\u4ef6\u683c\u5f0f\u89c4\u8303\u3002\u5982\u662f\u5426\u4ee5\u9b54\u6570\u5f00\u5934\u3001\u4e3b\u6b21\u7248\u672c\u53f7\u662f\u5426\u80fd\u88ab\u865a\u62df\u673a\u5904\u7406\u3001\u5e38\u91cf\u6c60\u7684\u5e38\u91cf\u4e2d\u662f\u5426\u6709\u4e0d\u88ab\u652f\u6301\u7684\u5e38\u91cf\u7c7b\u578b\u7b49\u7b49\u3002<\/p>\n
2. \u5143\u6570\u636e\u9a8c\u8bc1<\/p>\n
\u5bf9\u5b57\u8282\u7801\u63cf\u8ff0\u7684\u4fe1\u606f\u8fdb\u884c\u8bed\u4e49\u5206\u6790\u3002\u5982\u8fd9\u4e2a\u7c7b\u662f\u5426\u6709\u7236\u7c7b\u3001\u8fd9\u4e2a\u7c7b\u662f\u5426\u7ee7\u627f\u4e86\u4e0d\u5141\u8bb8\u88ab\u7ee7\u627f\u7684\u7c7b\u3001\u975e\u62bd\u8c61\u7c7b\u662f\u5426\u5b9e\u73b0\u4e86\u7236\u7c7b\u6216\u63a5\u53e3\u4e2d\u8981\u6c42\u5b9e\u73b0\u7684\u6240\u6709\u65b9\u6cd5\u7b49\u7b49\u3002<\/p>\n
3. \u5b57\u8282\u7801\u9a8c\u8bc1<\/p>\n
\u5206\u6790\u6570\u636e\u6d41\u548c\u63a7\u5236\u6d41\uff0c\u786e\u5b9a\u7a0b\u5e8f\u8bed\u4e49\u662f\u5426\u5408\u6cd5\uff0c\u7b26\u5408\u903b\u8f91\u3002\u5982\u4efb\u610f\u65f6\u523b\u64cd\u4f5c\u6570\u6808\u7684\u6570\u636e\u7c7b\u578b\u4e0e\u6307\u4ee4\u4ee3\u7801\u5e8f\u5217\u90fd\u80fd\u914d\u5408\u5de5\u4f5c\u3001\u4fdd\u8bc1\u8df3\u8f6c\u6307\u4ee4\u4e0d\u4f1a\u8df3\u8f6c\u5230\u65b9\u6cd5\u4f53\u4ee5\u5916\u7684\u5b57\u8282\u7801\u6307\u4ee4\u4e0a\u7b49\u7b49\u3002<\/p>\n
4. \u7b26\u53f7\u5f15\u7528\u9a8c\u8bc1<\/p>\n
\u7b26\u53f7\u5f15\u7528\u8f6c\u5316\u4e3a\u76f4\u63a5\u5f15\u7528\u7684\u65f6\u5019\u8fdb\u884c\u9a8c\u8bc1\u3002\u5982\u7b26\u53f7\u5f15\u7528\u4e2d\u901a\u8fc7\u5b57\u7b26\u4e32\u63cf\u8ff0\u7684\u5168\u9650\u5b9a\u540d\u662f\u5426\u80fd\u591f\u627e\u5230\u5bf9\u5e94\u7684\u7c7b\u3001\u6307\u5b9a\u7c7b\u4e2d\u662f\u5426\u5b58\u5728\u7b26\u5408\u65b9\u6cd5\u7684\u5b57\u6bb5\u63cf\u8ff0\u7b26\u4ee5\u53ca\u7b80\u5355\u540d\u79f0\u6240\u63cf\u8ff0\u7684\u65b9\u6cd5\u548c\u5b57\u6bb5\u7b49\u7b49\u3002<\/p>\n
7.2 \u51c6\u5907<\/p>\n
\u4e3a\u7c7b\u53d8\u91cf\u5206\u914d\u5185\u5b58\u5e76\u4e3a\u7c7b\u53d8\u91cf\u8bbe\u7f6e\u7cfb\u7edf\u521d\u59cb\u503c\u7684\u9636\u6bb5\uff0c\u8fd9\u4e9b\u53d8\u91cf\u6240\u4f7f\u7528\u7684\u5185\u5b58\u90fd\u5c06\u5728\u65b9\u6cd5\u533a\u8fdb\u884c\u5206\u914d\u3002\u9759\u6001\u5b57\u6bb5(\u975efinal)\u4f1a\u88ab\u8d4b\u4e88\u7cfb\u7edf\u9ed8\u8ba4\u503c\uff0c\u800c\u5bf9\u4e8e\u5e38\u91cf\u5b57\u6bb5\uff08final\u3001static\uff09\uff0c\u5728\u51c6\u5907\u9636\u6bb5\u76f4\u63a5\u8d4b\u4e88\u7528\u6237\u8bbe\u5b9a\u7684\u503c\u3002<\/p>\n
7.3 \u89e3\u6790<\/p>\n
\u5c06\u5e38\u91cf\u6c60\u4e2d\u7684\u7b26\u53f7\u5f15\u7528\uff08\u5305\u62ec\u7c7b\u6216\u63a5\u53e3\u7684\u5168\u9650\u5b9a\u540d\u3001\u5b57\u6bb5\u540d\u548c\u63cf\u8ff0\u7b26\u3001\u65b9\u6cd5\u540d\u548c\u63cf\u8ff0\u7b26\uff09\u66ff\u6362\u4e3a\u76f4\u63a5\u5f15\u7528\uff08\u5185\u5b58\u5730\u5740\uff09\u3002\u7b26\u53f7\u5f15\u7528\u4e0e\u6700\u7ec8class\u6587\u4ef6\u8f7d\u5165\u5185\u5b58\u7684\u5e03\u5c40\u65e0\u5173\uff0c\u76f4\u63a5\u5f15\u7528\u4e0e\u5185\u5b58\u7684\u5e03\u5c40\u6709\u5173\u3002\u4e3a\u4e86\u52a0\u5feb\u89e3\u6790\u6548\u7387\uff0c\u53ef\u4ee5\u5bf9\u89e3\u6790\u7ed3\u679c\u8fdb\u884c\u7f13\u5b58\uff0c\u4e4b\u540e\u518d\u89e3\u6790\u7b26\u53f7\u5f15\u7528\u65f6\u76f4\u63a5\u8fd4\u56de\u5373\u53ef\uff0c\u4f46\u662f\u5bf9\u4e8einvokedynamic\u5219\u4e0d\u80fd\u8fdb\u884c\u7f13\u5b58\u3002\u89e3\u6790\u4e3b\u8981\u662f\u9488\u5bf9CONSTANT_Class_info\u3001CONSTANT_Fieldref_info\u3001CONSTANT_Methodref_info\u3001CONSTANT_InterfaceMethodref_info\u3001CONSTANT_MethodType_info\u3001CONSTANT_MethodHandle_info\u3001CONSTANT_InvokeDynamic_info\u4e03\u79cd\u5e38\u91cf\u7c7b\u578b\u3002<\/p>\n
\u6307\u5411\u7c7b\u578b\u3001\u7c7b\u53d8\u91cf\u3001\u7c7b\u65b9\u6cd5\u7684\u76f4\u63a5\u5f15\u7528\u53ef\u80fd\u662f\u6307\u5411\u65b9\u6cd5\u533a\u7684\u672c\u5730\u6307\u9488\u3002\u7c7b\u578b\u7684\u76f4\u63a5\u5f15\u7528\u53ef\u80fd\u7b80\u5355\u5730\u6307\u5411\u4fdd\u5b58\u7c7b\u578b\u6570\u636e\u7684\u65b9\u6cd5\u533a\u4e2d\u7684\u4e0e\u5b9e\u73b0\u76f8\u5173\u7684\u6570\u636e\u7ed3\u6784\u3002\u7c7b\u53d8\u91cf\u7684\u76f4\u63a5\u5f15\u7528\u53ef\u4ee5\u6307\u5411\u65b9\u6cd5\u533a\u4e2d\u4fdd\u5b58\u7684\u7c7b\u53d8\u91cf\u7684\u503c\u3002\u7c7b\u65b9\u6cd5\u7684\u76f4\u63a5\u5f15\u7528\u53ef\u4ee5\u6307\u5411\u65b9\u6cd5\u533a\u4e2d\u7684\u4e00\u6bb5\u6570\u636e\u7ed3\u6784\u65b9\u6cd5\u533a\u4e2d\u5305\u542b\u8c03\u7528\u65b9\u6cd5\u7684\u5fc5\u8981\u6570\u636e\u3002<\/p>\n
\u6307\u5411\u5b9e\u4f8b\u53d8\u91cf\u548c\u5b9e\u4f8b\u65b9\u6cd5\u7684\u76f4\u63a5\u5f15\u7528\u90fd\u662f\u504f\u79fb\u91cf\u3002\u5b9e\u4f8b\u53d8\u91cf\u7684\u76f4\u63a5\u5f15\u7528\u53ef\u80fd\u662f\u4ece\u5bf9\u8c61\u7684\u6620\u50cf\u5f00\u59cb\u7b97\u8d77\u5230\u8fd9\u4e2a\u5b9e\u4f8b\u53d8\u91cf\u4f4d\u7f6e\u7684\u504f\u79fb\u91cf\u3002\u5b9e\u4f8b\u65b9\u6cd5\u7684\u76f4\u63a5\u5f15\u7528\u53ef\u80fd\u662f\u5230\u65b9\u6cd5\u8868\u7684\u504f\u79fb\u91cf\u3002<\/p>\n
1. \u7c7b\u6216\u63a5\u53e3\u7684\u89e3\u6790<\/p>\n
\u5c06\u7b26\u53f7\u5f15\u7528\u66ff\u6362\u4e3a\u76f4\u63a5\u5f15\u7528\u5305\u62ec\u5982\u4e0b\u51e0\u6b65\u3002\u5047\u8bbe\u7b26\u53f7\u5f15\u7528\u8bb0\u4e3aS\uff0c\u5f53\u524d\u7c7b\u8bb0\u4e3aC\uff0cS\u5bf9\u5e94\u7684\u7c7b\u6216\u63a5\u53e3\u8bb0\u4e3aI\u3002<\/p>\n
\u2460 \u82e5S\u4e0d\u662f\u6570\u7ec4\u7c7b\u578b\uff0c\u5219\u628aS\u4f20\u9012\u7ed9\u5f53\u524d\u7c7bC\u7684\u7c7b\u52a0\u8f7d\u5668\u8fdb\u884c\u52a0\u8f7d\uff0c\u8fd9\u4e2a\u8fc7\u7a0b\u53ef\u80fd\u4f1a\u89e6\u53d1\u5176\u4ed6\u7684\u52a0\u8f7d\uff0c\u8fd9\u4e2a\u8fc7\u7a0b\u4e00\u65e6\u51fa\u73b0\u5f02\u5e38\uff0c\u5219\u89e3\u6790\u5931\u8d25\u3002<\/p>\n
\u2461 \u82e5S\u662f\u6570\u7ec4\u7c7b\u578b\uff0c\u5e76\u4e14\u6570\u7ec4\u5143\u7d20\u7c7b\u578b\u4e3a\u5bf9\u8c61\uff0c\u5219S\u7684\u63cf\u8ff0\u7b26\u4f1a\u5f62\u5982[java\/lang\/String\uff0c\u6309\u7167\u7b2c\u4e00\u6761\u53bb\u52a0\u8f7d\u8be5\u7c7b\u578b\uff0c\u5982\u679cS\u7684\u63cf\u8ff0\u7b26\u7b26\u5408\uff0c\u5219\u9700\u8981\u52a0\u8f7d\u7684\u7c7b\u578b\u5c31\u662fjava.lang.String\uff0c\u63a5\u7740\u6709\u865a\u62df\u673a\u751f\u6210\u4e00\u4e2a\u4ee3\u8868\u6b64\u6570\u7ec4\u552f\u72ec\u548c\u5143\u7d20\u7684\u6570\u7ec4\u5bf9\u8c61\u3002<\/p>\n
\u2462 \u82e5\u4ee5\u4e0a\u4e24\u4e2a\u6b65\u9aa4\u6ca1\u6709\u51fa\u73b0\u5f02\u5e38\uff0c\u5373I\u5df2\u7ecf\u5b58\u5728\u4e8e\u5185\u5b58\u4e2d\u4e86\uff0c\u4f46\u662f\u89e3\u6790\u5b8c\u6210\u65f6\u8fd8\u9700\u8981\u8fdb\u884c\u7b26\u53f7\u5f15\u7528\u9a8c\u8bc1\uff0c\u786e\u8ba4C\u662f\u5426\u5177\u5907\u5bf9I\u7684\u8bbf\u95ee\u6743\u9650\u3002\u82e5\u4e0d\u5177\u5907\uff0c\u5219\u629b\u51fajava.lang.IllegalAccessError\u5f02\u5e38\u3002<\/p>\n
2. \u5b57\u6bb5\u89e3\u6790<\/p>\n
\u9996\u5148\u5c06CONSTANT_Fieldref_info\u4e2d\u7684class_index\u7d22\u5f15\u7684CONSTANT_Class_info\u7b26\u53f7\u5f15\u7528\u8fdb\u884c\u89e3\u6790\uff0c\u5373\u89e3\u6790\u5b57\u6bb5\u6240\u5728\u7c7b\u6216\u63a5\u53e3\uff0c\u82e5\u89e3\u6790\u51fa\u73b0\u5f02\u5e38\uff0c\u5219\u5b57\u6bb5\u89e3\u6790\u5931\u8d25\u3002\u5982\u89e3\u6790\u6210\u529f\uff0c\u5219\u8fdb\u884c\u4e0b\u9762\u7684\u89e3\u6790\u6b65\u9aa4\u3002\u5047\u8bbe\u8be5\u5b57\u6bb5\u6240\u5c5e\u7684\u7c7b\u6216\u63a5\u53e3\u6807\u8bb0\u4e3aC\u3002<\/p>\n
\u2460 \u5982\u679cC\u5305\u542b\u4e86\u5b57\u6bb5\u7684\u7b80\u5355\u540d\u548c\u63cf\u8ff0\u7b26\u4e0e\u76ee\u6807\u76f8\u5339\u914d\u7684\u5b57\u6bb5\uff0c\u5219\u8fd4\u56de\u8fd9\u4e2a\u5b57\u6bb5\u7684\u76f4\u63a5\u5f15\u7528\uff0c\u67e5\u627e\u7ed3\u675f\u3002<\/p>\n
\u2461 \u5426\u5219\uff0c\u5982\u679cC\u5b9e\u73b0\u4e86\u63a5\u53e3\uff0c\u6309\u7167\u7ee7\u627f\u5173\u7cfb\u4ece\u4e0b\u5f80\u4e0a\u9012\u5f52\u641c\u7d22\u5404\u4e2a\u63a5\u53e3\u548c\u5b83\u7684\u7236\u63a5\u53e3\uff0c\u770b\u662f\u5426\u5b58\u5728\u76f8\u5339\u914d\u7684\u5b57\u6bb5\u3002\u5b58\u5728\uff0c\u5219\u8fd4\u56de\u76f4\u63a5\u5f15\u7528\uff0c\u67e5\u627e\u7ed3\u675f\u3002<\/p>\n
\u2462 \u5426\u5219\uff0c\u5982\u679cC\u4e0d\u662fObject\u5bf9\u8c61\uff0c\u6309\u7167\u7ee7\u627f\u5173\u7cfb\u4ece\u4e0b\u5f80\u4e0a\u9012\u5f52\u641c\u7d22\u7236\u7c7b\uff0c\u770b\u662f\u5426\u5b58\u5728\u76f8\u5339\u914d\u7684\u5b57\u6bb5\u3002\u5b58\u5728\uff0c\u5219\u8fd4\u56de\u76f4\u63a5\u5f15\u7528\uff0c\u67e5\u627e\u7ed3\u675f\u3002<\/p>\n
\u2463 \u5426\u5219\uff0c\u67e5\u627e\u5931\u8d25\uff0c\u629b\u51fajava.lang.NoSuchFieldError\u5f02\u5e38\u3002<\/p>\n
\u8bf4\u660e\uff1a\u5b57\u6bb5\u89e3\u6790\u5bf9\u63a5\u53e3\u4f18\u5148\u641c\u7d22\u3002<\/p>\n
3. \u7c7b\u65b9\u6cd5\u89e3\u6790<\/p>\n
\u9996\u5148\u5c06CONSTANT_Methodref_info\u4e2d\u7684class_index\u7d22\u5f15\u7684CONSTANT_Class_info\u7b26\u53f7\u5f15\u7528\u8fdb\u884c\u89e3\u6790\uff0c\u5373\u89e3\u6790\u65b9\u6cd5\u6240\u5728\u7684\u7c7b\u6216\u63a5\u53e3\uff0c\u82e5\u89e3\u6790\u51fa\u73b0\u5f02\u5e38\uff0c\u5219\u65b9\u6cd5\u89e3\u6790\u5931\u8d25\uff1b\u5982\u89e3\u6790\u6210\u529f\uff0c\u5219\u8fdb\u884c\u4e0b\u9762\u89e3\u6790\u6b65\u9aa4\u3002\u5047\u8bbe\u8be5\u65b9\u6cd5\u6240\u5c5e\u7684\u7c7b\u6807\u8bb0\u4e3aC\u3002<\/p>\n
\u2460 \u5982\u679c\u5728\u65b9\u6cd5\u8868\u4e2d\u53d1\u73b0CONSTANT_Class_info\u4e2d\u7d22\u5f15\u7684C\u662f\u4e00\u4e2a\u63a5\u53e3\u800c\u4e0d\u662f\u4e00\u4e2a\u7c7b\uff0c\u5219\u629b\u51fajava.lang.IncompatibleClassChangeError\u5f02\u5e38\u3002<\/p>\n
\u2461 \u5426\u5219\uff0c\u5982\u679cC\u4e2d\u5305\u542b\u4e86\u65b9\u6cd5\u7684\u7b80\u5355\u540d\u548c\u63cf\u8ff0\u7b26\u4e0e\u76ee\u6807\u76f8\u5339\u914d\u7684\u5b57\u6bb5\uff0c\u5219\u8fd4\u56de\u8fd9\u4e2a\u65b9\u6cd5\u7684\u76f4\u63a5\u5f15\u7528\uff0c\u67e5\u627e\u7ed3\u675f\u3002<\/p>\n
\u2462 \u5426\u5219\uff0c\u5728C\u7684\u7236\u7c7b\u4e2d\u9012\u5f52\u641c\u7d22\uff0c\u770b\u662f\u5426\u5b58\u5728\u76f8\u5339\u914d\u7684\u65b9\u6cd5\uff0c\u5b58\u5728\uff0c\u5219\u8fd4\u56de\u76f4\u63a5\u5f15\u7528\uff0c\u67e5\u627e\u7ed3\u675f\u3002<\/p>\n
\u2463 \u5426\u5219\uff0c\u5728C\u5b9e\u73b0\u7684\u63a5\u53e3\u5217\u8868\u53ca\u7236\u63a5\u53e3\u4e2d\u9012\u5f52\u641c\u7d22\uff0c\u770b\u662f\u5426\u5b58\u5728\u76f8\u5339\u914d\u7684\u65b9\u6cd5\uff0c\u5b58\u5728\uff0c\u8bf4\u660eC\u662f\u4e00\u4e2a\u62bd\u8c61\u7c7b\uff08\u6ca1\u6709\u5b9e\u73b0\u8be5\u65b9\u6cd5\uff0c\u5426\u5219\uff0c\u5728\u7b2c\u4e00\u6b65\u5c31\u67e5\u627e\u6210\u529f\uff09\uff0c\u629b\u51fajava.lang.AbstractMethodError\u5f02\u5e38\u3002<\/p>\n
\u2464 \u5426\u5219\uff0c\u67e5\u627e\u5931\u8d25\uff0c\u629b\u51fajava.lang.NoSuchMethodError\u5f02\u5e38\u3002<\/p>\n
\u2465 \u82e5\u67e5\u627e\u8fc7\u7a0b\u6210\u529f\uff0c\u5219\u5bf9\u65b9\u6cd5\u8fdb\u884c\u6743\u9650\u9a8c\u8bc1\uff0c\u5982\u679c\u53d1\u73b0\u4e0d\u5177\u5907\u5bf9\u6b64\u65b9\u6cd5\u7684\u8bbf\u95ee\u6743\u9650\uff0c\u5219\u629b\u51fajava.lang.lllegalAccessError\u5f02\u5e38\u3002<\/p>\n
\u8bf4\u660e\uff1a\u65b9\u6cd5\u89e3\u6790\u5bf9\u7236\u7c7b\u4f18\u5148\u641c\u7d22\u3002<\/p>\n
4. \u63a5\u53e3\u65b9\u6cd5\u89e3\u6790<\/p>\n
\u9996\u5148\u5c06CONSTANT_InterfaceMethodref_info\u4e2d\u7684class_index\u7d22\u5f15\u7684CONSTANT_Class_info\u7b26\u53f7\u5f15\u7528\u8fdb\u884c\u89e3\u6790\uff0c\u5373\u89e3\u6790\u65b9\u6cd5\u6240\u5728\u7684\u7c7b\u6216\u63a5\u53e3\uff0c\u82e5\u89e3\u6790\u51fa\u73b0\u5f02\u5e38\uff0c\u5219\u65b9\u6cd5\u89e3\u6790\u5931\u8d25\uff1b\u5982\u89e3\u6790\u6210\u529f\uff0c\u5219\u8fdb\u884c\u4e0b\u9762\u89e3\u6790\u6b65\u9aa4\u3002\u5047\u8bbe\u8be5\u65b9\u6cd5\u6240\u5c5e\u7684\u7c7b\u6807\u8bb0\u4e3aC\u3002<\/p>\n
\u2460 \u5982\u679c\u5728\u65b9\u6cd5\u8868\u4e2d\u53d1\u73b0CONSTANT_Class_info\u4e2d\u7d22\u5f15\u7684C\u662f\u4e00\u4e2a\u7c7b\u800c\u4e0d\u662f\u63a5\u53e3\uff0c\u5219\u629b\u51fajava.lang.IncompatibleClassChangeError\u5f02\u5e38\u3002<\/p>\n
\u2461 \u5426\u5219\uff0c\u5982\u679cC\u4e2d\u5305\u542b\u4e86\u65b9\u6cd5\u7684\u7b80\u5355\u540d\u548c\u63cf\u8ff0\u7b26\u4e0e\u76ee\u6807\u76f8\u5339\u914d\u7684\u5b57\u6bb5\uff0c\u5219\u8fd4\u56de\u8fd9\u4e2a\u65b9\u6cd5\u7684\u76f4\u63a5\u5f15\u7528\uff0c\u67e5\u627e\u7ed3\u675f\u3002<\/p>\n
\u2462 \u5426\u5219\uff0c\u5728C\u7684\u7236\u63a5\u53e3\u4e2d\u9012\u5f52\u641c\u7d22\uff0c\u76f4\u5230Object\u7c7b\uff0c\u770b\u662f\u5426\u5b58\u5728\u76f8\u5339\u914d\u7684\u65b9\u6cd5\uff0c\u5b58\u5728\uff0c\u5219\u8fd4\u56de\u76f4\u63a5\u5f15\u7528\uff0c\u67e5\u627e\u7ed3\u675f\u3002<\/p>\n
\u2463 \u5426\u5219\uff0c\u67e5\u627e\u5931\u8d25\uff0c\u629b\u51fajava.lang.NoSuchMethodError\u5f02\u5e38\u3002<\/p>\n
\u2464 \u82e5\u67e5\u627e\u8fc7\u7a0b\u6210\u529f\uff0c\u4e0d\u9700\u8981\u8fdb\u884c\u6743\u9650\u9a8c\u8bc1\uff0c\u56e0\u4e3a\u63a5\u53e3\u65b9\u6cd5\u4e3apublic\uff0c\u4e0d\u4f1a\u629b\u51fajava.lang.IllegalAccessError\u5f02\u5e38\u3002<\/p>\n
\u516b\u3001\u521d\u59cb\u5316<\/strong><\/p>\n
\u5728\u6b64\u9636\u6bb5\uff0c\u624d\u5f00\u59cb\u771f\u6b63\u6267\u884c\u7528\u6237\u81ea\u5b9a\u7684java\u4ee3\u7801\u3002\u5728\u51c6\u5907\u9636\u6bb5\uff0c\u7c7b\u53d8\u91cf\u5df2\u7ecf\u88ab\u8d4b\u4e88\u4e86\u7cfb\u7edf\u9ed8\u8ba4\u503c\uff0c\u800c\u5728\u521d\u59cb\u5316\u9636\u6bb5\uff0c\u4f1a\u8d4b\u4e88\u7528\u6237\u81ea\u5b9a\u4e49\u7684\u503c\u3002\u800c\u521d\u59cb\u5316\u9636\u6bb5\u662f\u5728<clinit>()\u65b9\u6cd5\u4e2d\u6267\u884c\u7684\u3002<\/p>\n
8.1 <clinit>()\u65b9\u6cd5<\/p>\n
\u2460 \u7531\u7f16\u8bd1\u5668\u6536\u96c6\u7c7b\u4e2d\u7684\u6240\u6709\u7c7b\u53d8\u91cf\u7684\u8d4b\u503c\u52a8\u4f5c\uff08\u5982\u679c\u4ec5\u4ec5\u53ea\u662f\u58f0\u660e\uff0c\u4e0d\u4f1a\u88ab\u6536\u96c6\uff09\u548c\u9759\u6001\u8bed\u53e5\u5757\u4e2d\u7684\u8bed\u53e5\u5408\u5e76\u4ea7\u751f\u7684\uff0c\u6536\u96c6\u987a\u5e8f\u6309\u7167\u8bed\u53e5\u5728\u6e90\u6587\u4ef6\u4e2d\u51fa\u73b0\u7684\u987a\u5e8f\u6240\u51b3\u5b9a\uff1b\u5728\u9759\u6001\u8bed\u53e5\u5757\u4e2d\u53ea\u80fd\u8bbf\u95ee\u5b9a\u4e49\u5728\u9759\u6001\u8bed\u53e5\u4e4b\u524d\u7684\u53d8\u91cf\uff1b\u800c\u5bf9\u4e8e\u5b9a\u4e49\u5728\u9759\u6001\u8bed\u53e5\u5757\u4e4b\u540e\u7684\u53d8\u91cf\uff0c\u53ef\u4ee5\u8fdb\u884c\u8d4b\u503c\uff0c\u4f46\u662f\u4e0d\u80fd\u591f\u8bbf\u95ee\u3002<\/p>\n
\u2461 \u4e0d\u9700\u8981\u663e\u793a\u8c03\u7528\u7236\u7c7b\u6784\u9020\u5668\uff0c\u865a\u62df\u673a\u4f1a\u4fdd\u8bc1\u5728\u5b50\u7c7b\u7684<clinit>()\u65b9\u6cd5\u6267\u884c\u4e4b\u524d\uff0c\u7236\u7c7b\u7684<clinit>()\u65b9\u6cd5\u5df2\u7ecf\u6267\u884c\u5b8c\u6bd5\uff0c\u6240\u4ee5\uff0c\u7b2c\u4e00\u4e2a\u88ab\u6267\u884c\u7684<clinit>()\u65b9\u6cd5\u7684\u7c7b\u80af\u5b9a\u662fjava.lang.Object\u3002<\/p>\n
\u2462 \u7236\u7c7b\u4e2d\u5b9a\u4e49\u7684\u9759\u6001\u8bed\u53e5\u5757\u4f18\u5148\u4e8e\u5b50\u7c7b\u7684\u9759\u6001\u8bed\u53e5\u3002<\/p>\n
\u2463 \u6b64\u65b9\u6cd5\u5bf9\u7c7b\u548c\u63a5\u53e3\u90fd\u4e0d\u662f\u5fc5\u987b\u7684\uff0c\u82e5\u7c7b\u4e2d\u6ca1\u6709\u9759\u6001\u8bed\u53e5\u5757\u548c\u9759\u6001\u53d8\u91cf\u8d4b\u503c\u64cd\u4f5c\uff0c\u5219\u4e0d\u4f1a\u751f\u6210<clinit>()\u65b9\u6cd5\u3002<\/p>\n
\u2464 \u63a5\u53e3\u4f1a\u751f\u6210\u6b64\u65b9\u6cd5\uff0c\u56e0\u4e3a\u5bf9\u63a5\u53e3\u7684\u5b57\u6bb5\u53ef\u4ee5\u8fdb\u884c\u8d4b\u503c\u64cd\u4f5c\u3002\u6267\u884c\u63a5\u53e3\u7684<clinit>()\u65b9\u6cd5\u4e0d\u9700\u8981\u5148\u6267\u884c\u7236\u63a5\u53e3\u7684<clinit>()\u65b9\u6cd5\uff0c\u53ea\u6709\u5728\u4f7f\u7528\u7236\u63a5\u53e3\u7684\u53d8\u91cf\u65f6\uff0c\u624d\u4f1a\u8fdb\u884c\u521d\u59cb\u5316\uff1b\u63a5\u53e3\u7684\u5b9e\u73b0\u7c7b\u5728\u521d\u59cb\u5316\u65f6\u4e5f\u4e0d\u4f1a\u6267\u884c\u63a5\u53e3\u7684<clinit>()\u65b9\u6cd5\u3002<\/p>\n
\u2465 \u6b64\u65b9\u6cd5\u5728\u591a\u7ebf\u7a0b\u73af\u5883\u4e2d\u4f1a\u88ab\u6b63\u786e\u7684\u52a0\u9501\u3001\u540c\u6b65\u3002<\/p>\n
\u4e5d\u3001\u7c7b\u52a0\u8f7d\u5668<\/strong><\/p>\n
\u7c7b\u52a0\u8f7d\u5668\u7528\u4e8e\u52a0\u8f7d\u7c7b\uff0c\u4efb\u4f55\u7c7b\u90fd\u9700\u8981\u7531\u52a0\u8f7d\u5b83\u7684\u7c7b\u52a0\u8f7d\u5668\u548c\u8fd9\u4e2a\u7c7b\u4e00\u540c\u786e\u7acb\u5176\u5728Java\u865a\u62df\u673a\u4e2d\u7684\u552f\u4e00\u6027\uff0c\u6bcf\u4e00\u4e2a\u7c7b\u52a0\u8f7d\u5668\uff0c\u90fd\u6709\u4e00\u4e2a\u72ec\u7acb\u7684\u7c7b\u540d\u79f0\u7a7a\u95f4\uff0c\u7531\u4e0d\u540c\u7c7b\u52a0\u8f7d\u7684\u7c7b\u4e0d\u53ef\u80fd\u76f8\u7b49\u3002<\/p>\n
9.1. \u53cc\u4eb2\u59d4\u6d3e\u6a21\u578b<\/p>\n
\u4ece\u865a\u62df\u673a\u89d2\u5ea6\u770b\uff0c\u53ea\u5b58\u5728\u4e24\u79cd\u7c7b\u52a0\u8f7d\u5668\uff1a1. \u542f\u52a8\u7c7b\u52a0\u8f7d\u5668\u30022. \u5176\u4ed6\u7c7b\u52a0\u8f7d\u5668\u3002\u4ece\u5f00\u53d1\u4eba\u5458\u89d2\u5ea6\u770b\uff0c\u5305\u62ec\u5982\u4e0b\u7c7b\u52a0\u8f7d\u5668\uff1a1. \u542f\u52a8\u7c7b\u52a0\u8f7d\u5668\u30022. \u6269\u5c55\u7c7b\u52a0\u8f7d\u5668\u30023. \u5e94\u7528\u7a0b\u5e8f\u7c7b\u52a0\u8f7d\u5668\u30024. \u81ea\u5b9a\u4e49\u7c7b\u52a0\u8f7d\u5668\u3002<\/p>\n
\u2460 \u542f\u52a8\u7c7b\u52a0\u8f7d\u5668\uff0c\u7528\u4e8e\u52a0\u8f7dJava API\uff0c\u52a0\u8f7d<JAVA_HOME>\\lib\u76ee\u5f55\u4e0b\u7684\u7c7b\u5e93\u3002<\/p>\n
\u2461 \u6269\u5c55\u7c7b\u52a0\u8f7d\u7c7b\uff0c\u7531sun.misc.Launcher$ExtClassLoader\u5b9e\u73b0\uff0c\u7528\u4e8e\u52a0\u8f7d<JAVA_HOME>\\lib\\ext\u76ee\u5f55\u4e0b\u6216\u8005\u88abjava.ext.dirs\u7cfb\u7edf\u53d8\u91cf\u6307\u5b9a\u8def\u5f84\u4e0b\u7684\u7c7b\u5e93\u3002<\/p>\n
\u2462 \u5e94\u7528\u7a0b\u5e8f\u7c7b\u52a0\u8f7d\u5668\uff0c\u4e5f\u6210\u4e3a\u7cfb\u7edf\u7c7b\u52a0\u8f7d\u5668\uff0c\u7531sun.misc.Launcher$AppClassLoader\u5b9e\u73b0\uff0c\u7528\u4e8e\u52a0\u8f7d\u7528\u6237\u7c7b\u8def\u5f84(ClassPath)\u4e0a\u6240\u6307\u5b9a\u7684\u7c7b\u5e93\u3002<\/p>\n
\u2463 \u81ea\u5b9a\u4e49\u7c7b\u52a0\u8f7d\u5668\uff0c\u7ee7\u627f\u7cfb\u7edf\u7c7b\u52a0\u8f7d\u5668\uff0c\u5b9e\u73b0\u7528\u6237\u81ea\u5b9a\u4e49\u52a0\u8f7d\u903b\u8f91\u3002<\/p>\n
\u5404\u4e2a\u7c7b\u52a0\u8f7d\u5668\u4e4b\u95f4\u662f\u7ec4\u5408\u5173\u7cfb\uff0c\u5e76\u975e\u7ee7\u627f\u5173\u7cfb\u3002<\/p>\n
\u5f53\u4e00\u4e2a\u7c7b\u52a0\u8f7d\u5668\u6536\u5230\u7c7b\u52a0\u8f7d\u7684\u8bf7\u6c42\uff0c\u5b83\u5c06\u8fd9\u4e2a\u52a0\u8f7d\u8bf7\u6c42\u59d4\u6d3e\u7ed9\u7236\u7c7b\u52a0\u8f7d\u5668\u8fdb\u884c\u52a0\u8f7d\uff0c\u6bcf\u4e00\u5c42\u52a0\u8f7d\u5668\u90fd\u662f\u5982\u6b64\uff0c\u6700\u7ec8\uff0c\u6240\u6709\u7684\u8bf7\u6c42\u90fd\u4f1a\u4f20\u9001\u5230\u542f\u52a8\u7c7b\u52a0\u8f7d\u5668\u4e2d\u3002\u53ea\u6709\u5f53\u7236\u7c7b\u52a0\u8f7d\u5668\u81ea\u5df1\u65e0\u6cd5\u5b8c\u6210\u52a0\u8f7d\u8bf7\u6c42\u65f6\uff0c\u5b50\u7c7b\u52a0\u8f7d\u5668\u624d\u4f1a\u5c1d\u8bd5\u81ea\u5df1\u52a0\u8f7d\u3002<\/p>\n
\u53cc\u4eb2\u59d4\u6d3e\u6a21\u578b\u53ef\u4ee5\u786e\u4fdd\u5b89\u5168\u6027\uff0c\u53ef\u4ee5\u4fdd\u8bc1\u6240\u6709\u7684Java\u7c7b\u5e93\u90fd\u662f\u7531\u542f\u52a8\u7c7b\u52a0\u8f7d\u5668\u52a0\u8f7d\u3002\u5982\u7528\u6237\u7f16\u5199\u7684java.lang.Object\uff0c\u52a0\u8f7d\u8bf7\u6c42\u4f20\u9012\u5230\u542f\u52a8\u7c7b\u52a0\u8f7d\u5668\uff0c\u542f\u52a8\u7c7b\u52a0\u8f7d\u7684\u662f\u7cfb\u7edf\u4e2d\u7684Object\u5bf9\u8c61\uff0c\u800c\u7528\u6237\u7f16\u5199\u7684java.lang.Object\u4e0d\u4f1a\u88ab\u52a0\u8f7d\u3002\u5982\u7528\u6237\u7f16\u5199\u7684java.lang.virus\u7c7b\uff0c\u52a0\u8f7d\u8bf7\u6c42\u4f20\u9012\u5230\u542f\u52a8\u7c7b\u52a0\u8f7d\u5668\uff0c\u542f\u52a8\u7c7b\u52a0\u8f7d\u5668\u53d1\u73b0virus\u7c7b\u5e76\u4e0d\u662f\u6838\u5fc3Java\u7c7b\uff0c\u65e0\u6cd5\u8fdb\u884c\u52a0\u8f7d\uff0c\u5c06\u4f1a\u7531\u5177\u4f53\u7684\u5b50\u7c7b\u52a0\u8f7d\u5668\u8fdb\u884c\u52a0\u8f7d\uff0c\u800c\u7ecf\u8fc7\u4e0d\u540c\u52a0\u8f7d\u5668\u8fdb\u884c\u52a0\u8f7d\u7684\u7c7b\u662f\u65e0\u6cd5\u8bbf\u95ee\u5f7c\u6b64\u7684\u3002\u7531\u4e0d\u540c\u52a0\u8f7d\u5668\u52a0\u8f7d\u7684\u7c7b\u5904\u4e8e\u4e0d\u540c\u7684\u8fd0\u884c\u65f6\u5305\u3002\u6240\u6709\u7684\u8bbf\u95ee\u6743\u9650\u90fd\u662f\u57fa\u4e8e\u540c\u4e00\u4e2a\u8fd0\u884c\u65f6\u5305\u800c\u8a00\u7684\u3002<\/p>\n
\u5341\u3001\u4f7f\u7528<\/strong><\/p>\n
\u5b8c\u6210\u4e86\u521d\u59cb\u5316\u9636\u6bb5\u540e\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u4f7f\u7528\u5bf9\u8c61\u4e86\uff0c\u5728\u7a0b\u5e8f\u4e2d\u53ef\u4ee5\u968f\u610f\u8fdb\u884c\u8bbf\u95ee\uff0c\u53ea\u8981\u7c7b\u8fd8\u6ca1\u6709\u88ab\u5378\u8f7d\u3002<\/p>\n
\u5341\u4e00\u3001\u5378\u8f7d<\/strong><\/p>\n
\u5bf9\u7c7b\u578b\u8fdb\u884c\u5378\u8f7d\uff0c\u5728\u4e4b\u524d\u7684\u5783\u573e\u56de\u6536\u4e2d\u6211\u4eec\u5df2\u7ecf\u8bb2\u89e3\u4e86\u5982\u4f55\u624d\u80fd\u5bf9\u7c7b\u578b\u8fdb\u884c\u5378\u8f7d\uff0c\u5373\u56de\u6536\u64cd\u4f5c\u3002\u542f\u52a8\u7c7b\u52a0\u8f7d\u7684\u7c7b\u578b\u6c38\u8fdc\u662f\u53ef\u89e6\u53ca\u7684\uff0c\u56de\u6536\u7684\u662f\u7531\u7528\u6237\u81ea\u5b9a\u4e49\u52a0\u52a0\u8f7d\u5668\u52a0\u8f7d\u7684\u7c7b\u3002<\/p>\n
\u5341\u4e8c\u3001\u603b\u7ed3<\/strong><\/p>\n
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