“`” \u6839\u636e Java \u865a\u62df\u673a\u89c4\u8303\uff0c\u7c7b\u6587\u4ef6\u7531\u5355\u4e2a ClassFile \u7ed3\u6784\u7ec4\u6210\uff1a<\/p>\n
<pre><code>ClassFile { u4 magic; \/\/Class \u6587\u4ef6\u7684\u6807\u5fd7 u2 minor_version;\/\/Class \u7684\u5c0f\u7248\u672c\u53f7 u2 major_version;\/\/Class \u7684\u5927\u7248\u672c\u53f7 u2 constant_pool_count;\/\/\u5e38\u91cf\u6c60\u7684\u6570\u91cf cp_info constant_pool[constant_pool_count-1];\/\/\u5e38\u91cf\u6c60 u2 access_flags;\/\/Class \u7684\u8bbf\u95ee\u6807\u8bb0 u2 this_class;\/\/\u5f53\u524d\u7c7b u2 super_class;\/\/\u7236\u7c7b u2 interfaces_count;\/\/\u63a5\u53e3 u2 interfaces[interfaces_count];\/\/\u4e00\u4e2a\u7c7b\u53ef\u4ee5\u5b9e\u73b0\u591a\u4e2a\u63a5\u53e3 u2 fields_count;\/\/Class \u6587\u4ef6\u7684\u5b57\u6bb5\u5c5e\u6027 field_info fields[fields_count];\/\/\u4e00\u4e2a\u7c7b\u4f1a\u53ef\u4ee5\u6709\u4e2a\u5b57\u6bb5 u2 methods_count;\/\/Class \u6587\u4ef6\u7684\u65b9\u6cd5\u6570\u91cf method_info methods[methods_count];\/\/\u4e00\u4e2a\u7c7b\u53ef\u4ee5\u6709\u4e2a\u591a\u4e2a\u65b9\u6cd5 u2 attributes_count;\/\/\u6b64\u7c7b\u7684\u5c5e\u6027\u8868\u4e2d\u7684\u5c5e\u6027\u6570 attribute_info attributes[attributes_count];\/\/\u5c5e\u6027\u8868\u96c6\u5408}<\/code><\/pre><\/p>\n
\u4e0b\u9762\u8be6\u7ec6\u4ecb\u7ecd\u4e00\u4e0b Class \u6587\u4ef6\u7ed3\u6784\u6d89\u53ca\u5230\u7684\u4e00\u4e9b\u7ec4\u4ef6\u3002<\/p>\n
<strong>Class\u6587\u4ef6\u5b57\u8282\u7801\u7ed3\u6784\u7ec4\u7ec7\u793a\u610f\u56fe<\/strong> \uff08\u4e4b\u524d\u5728\u7f51\u4e0a\u4fdd\u5b58\u7684\uff0c\u975e\u5e38\u4e0d\u9519\uff0c\u539f\u51fa\u5904\u4e0d\u660e\uff09\uff1a<\/p>\n
<img src=""https:\/\/my-blog-to-use.oss-cn-beijing.aliyuncs.com\/2019-6\/%E7%B1%BB%E6%96%87%E4%BB%B6%E5%AD%97%E8%8A%82%E7%A0%81%E7%BB%93%E6%9E%84%E7%BB%84%E7%BB%87%E7%A4%BA%E6%84%8F%E5%9B%BE.png"" referrerpolicy=""no-referrer"" alt=""\u7c7b\u6587\u4ef6\u5b57\u8282\u7801\u7ed3\u6784\u7ec4\u7ec7\u793a\u610f\u56fe"" style=""width: 100%;""><\/p>\n
<h3>2.1 \u9b54\u6570<\/h3><\/p>\n
<pre><code> u4 magic; \/\/Class \u6587\u4ef6\u7684\u6807\u5fd7<\/code><\/pre><\/p>\n
\u6bcf\u4e2a Class \u6587\u4ef6\u7684\u5934\u56db\u4e2a\u5b57\u8282\u79f0\u4e3a\u9b54\u6570\uff08Magic Number\uff09,\u5b83\u7684\u552f\u4e00\u4f5c\u7528\u662f<strong>\u786e\u5b9a\u8fd9\u4e2a\u6587\u4ef6\u662f\u5426\u4e3a\u4e00\u4e2a\u80fd\u88ab\u865a\u62df\u673a\u63a5\u6536\u7684 Class \u6587\u4ef6<\/strong>\u3002 <\/p>\n
\u7a0b\u5e8f\u8bbe\u8ba1\u8005\u5f88\u591a\u65f6\u5019\u90fd\u559c\u6b22\u7528\u4e00\u4e9b\u7279\u6b8a\u7684\u6570\u5b57\u8868\u793a\u56fa\u5b9a\u7684\u6587\u4ef6\u7c7b\u578b\u6216\u8005\u5176\u5b83\u7279\u6b8a\u7684\u542b\u4e49\u3002<\/p>\n
<h3>2.2 Class \u6587\u4ef6\u7248\u672c<\/h3><\/p>\n
<pre><code> u2 minor_version;\/\/Class \u7684\u5c0f\u7248\u672c\u53f7 u2 major_version;\/\/Class \u7684\u5927\u7248\u672c\u53f7<\/code><\/pre><\/p>\n
\u7d27\u63a5\u7740\u9b54\u6570\u7684\u56db\u4e2a\u5b57\u8282\u5b58\u50a8\u7684\u662f Class \u6587\u4ef6\u7684\u7248\u672c\u53f7\uff1a\u7b2c\u4e94\u548c\u7b2c\u516d\u662f<strong>\u6b21\u7248\u672c\u53f7<\/strong>\uff0c\u7b2c\u4e03\u548c\u7b2c\u516b\u662f<strong>\u4e3b\u7248\u672c\u53f7<\/strong>\u3002<\/p>\n
\u9ad8\u7248\u672c\u7684 Java \u865a\u62df\u673a\u53ef\u4ee5\u6267\u884c\u4f4e\u7248\u672c\u7f16\u8bd1\u5668\u751f\u6210\u7684 Class \u6587\u4ef6\uff0c\u4f46\u662f\u4f4e\u7248\u672c\u7684 Java \u865a\u62df\u673a\u4e0d\u80fd\u6267\u884c\u9ad8\u7248\u672c\u7f16\u8bd1\u5668\u751f\u6210\u7684 Class \u6587\u4ef6\u3002\u6240\u4ee5\uff0c\u6211\u4eec\u5728\u5b9e\u9645\u5f00\u53d1\u7684\u65f6\u5019\u8981\u786e\u4fdd\u5f00\u53d1\u7684\u7684 JDK \u7248\u672c\u548c\u751f\u4ea7\u73af\u5883\u7684 JDK \u7248\u672c\u4fdd\u6301\u4e00\u81f4\u3002<\/p>\n
<h3>2.3 \u5e38\u91cf\u6c60<\/h3><\/p>\n
<pre><code> u2 constant_pool_count;\/\/\u5e38\u91cf\u6c60\u7684\u6570\u91cf cp_info constant_pool[constant_pool_count-1];\/\/\u5e38\u91cf\u6c60<\/code><\/pre><\/p>\n
\u7d27\u63a5\u7740\u4e3b\u6b21\u7248\u672c\u53f7\u4e4b\u540e\u7684\u662f\u5e38\u91cf\u6c60\uff0c\u5e38\u91cf\u6c60\u7684\u6570\u91cf\u662f constant_pool_count-1\uff08<strong>\u5e38\u91cf\u6c60\u8ba1\u6570\u5668\u662f\u4ece1\u5f00\u59cb\u8ba1\u6570\u7684\uff0c\u5c06\u7b2c0\u9879\u5e38\u91cf\u7a7a\u51fa\u6765\u662f\u6709\u7279\u6b8a\u8003\u8651\u7684\uff0c\u7d22\u5f15\u503c\u4e3a0\u4ee3\u8868\u201c\u4e0d\u5f15\u7528\u4efb\u4f55\u4e00\u4e2a\u5e38\u91cf\u6c60\u9879\u201d<\/strong>\uff09\u3002<\/p>\n
\u5e38\u91cf\u6c60\u4e3b\u8981\u5b58\u653e\u4e24\u5927\u5e38\u91cf\uff1a\u5b57\u9762\u91cf\u548c\u7b26\u53f7\u5f15\u7528\u3002\u5b57\u9762\u91cf\u6bd4\u8f83\u63a5\u8fd1\u4e8e Java \u8bed\u8a00\u5c42\u9762\u7684\u7684\u5e38\u91cf\u6982\u5ff5\uff0c\u5982\u6587\u672c\u5b57\u7b26\u4e32\u3001\u58f0\u660e\u4e3a final \u7684\u5e38\u91cf\u503c\u7b49\u3002\u800c\u7b26\u53f7\u5f15\u7528\u5219\u5c5e\u4e8e\u7f16\u8bd1\u539f\u7406\u65b9\u9762\u7684\u6982\u5ff5\u3002\u5305\u62ec\u4e0b\u9762\u4e09\u7c7b\u5e38\u91cf\uff1a <\/p>\n
<ul><li>\u7c7b\u548c\u63a5\u53e3\u7684\u5168\u9650\u5b9a\u540d <\/li><li>\u5b57\u6bb5\u7684\u540d\u79f0\u548c\u63cf\u8ff0\u7b26 <\/li><li>\u65b9\u6cd5\u7684\u540d\u79f0\u548c\u63cf\u8ff0\u7b26<\/li><\/ul><\/p>\n
\u5e38\u91cf\u6c60\u4e2d\u6bcf\u4e00\u9879\u5e38\u91cf\u90fd\u662f\u4e00\u4e2a\u8868\uff0c\u8fd914\u79cd\u8868\u6709\u4e00\u4e2a\u5171\u540c\u7684\u7279\u70b9\uff1a<strong>\u5f00\u59cb\u7684\u7b2c\u4e00\u4f4d\u662f\u4e00\u4e2a u1 \u7c7b\u578b\u7684\u6807\u5fd7\u4f4d -tag \u6765\u6807\u8bc6\u5e38\u91cf\u7684\u7c7b\u578b\uff0c\u4ee3\u8868\u5f53\u524d\u8fd9\u4e2a\u5e38\u91cf\u5c5e\u4e8e\u54ea\u79cd\u5e38\u91cf\u7c7b\u578b\uff0e<\/strong><\/p>\n
<figure><table><thead><tr><th style=""text-align:center;"">\u7c7b\u578b<\/th><th style=""text-align:center;"">\u6807\u5fd7\uff08tag\uff09<\/th><th style=""text-align:center;"">\u63cf\u8ff0<\/th><\/tr><\/thead><tbody><tr><td style=""text-align:center;"">CONSTANT_utf8_info<\/td><td style=""text-align:center;"">1<\/td><td style=""text-align:center;"">UTF-8\u7f16\u7801\u7684\u5b57\u7b26\u4e32<\/td><\/tr><tr><td style=""text-align:center;"">CONSTANT_Integer_info<\/td><td style=""text-align:center;"">3<\/td><td style=""text-align:center;"">\u6574\u5f62\u5b57\u9762\u91cf<\/td><\/tr><tr><td style=""text-align:center;"">CONSTANT_Float_info<\/td><td style=""text-align:center;"">4<\/td><td style=""text-align:center;"">\u6d6e\u70b9\u578b\u5b57\u9762\u91cf<\/td><\/tr><tr><td style=""text-align:center;"">CONSTANT_Long_info<\/td><td style=""text-align:center;"">\uff15<\/td><td style=""text-align:center;"">\u957f\u6574\u578b\u5b57\u9762\u91cf<\/td><\/tr><tr><td style=""text-align:center;"">CONSTANT_Double_info<\/td><td style=""text-align:center;"">\uff16<\/td><td style=""text-align:center;"">\u53cc\u7cbe\u5ea6\u6d6e\u70b9\u578b\u5b57\u9762\u91cf<\/td><\/tr><tr><td style=""text-align:center;"">CONSTANT_Class_info<\/td><td style=""text-align:center;"">\uff17<\/td><td style=""text-align:center;"">\u7c7b\u6216\u63a5\u53e3\u7684\u7b26\u53f7\u5f15\u7528<\/td><\/tr><tr><td style=""text-align:center;"">CONSTANT_String_info<\/td><td style=""text-align:center;"">\uff18<\/td><td style=""text-align:center;"">\u5b57\u7b26\u4e32\u7c7b\u578b\u5b57\u9762\u91cf<\/td><\/tr><tr><td style=""text-align:center;"">CONSTANT_Fieldref_info<\/td><td style=""text-align:center;"">\uff19<\/td><td style=""text-align:center;"">\u5b57\u6bb5\u7684\u7b26\u53f7\u5f15\u7528<\/td><\/tr><tr><td style=""text-align:center;"">CONSTANT_Methodref_info<\/td><td style=""text-align:center;"">10<\/td><td style=""text-align:center;"">\u7c7b\u4e2d\u65b9\u6cd5\u7684\u7b26\u53f7\u5f15\u7528<\/td><\/tr><tr><td style=""text-align:center;"">CONSTANT_InterfaceMethodref_info<\/td><td style=""text-align:center;"">11<\/td><td style=""text-align:center;"">\u63a5\u53e3\u4e2d\u65b9\u6cd5\u7684\u7b26\u53f7\u5f15\u7528<\/td><\/tr><tr><td style=""text-align:center;"">CONSTANT_NameAndType_info<\/td><td style=""text-align:center;"">12<\/td><td style=""text-align:center;"">\u5b57\u6bb5\u6216\u65b9\u6cd5\u7684\u7b26\u53f7\u5f15\u7528<\/td><\/tr><tr><td style=""text-align:center;"">CONSTANT_MothodType_info<\/td><td style=""text-align:center;"">16<\/td><td style=""text-align:center;"">\u6807\u5fd7\u65b9\u6cd5\u7c7b\u578b<\/td><\/tr><tr><td style=""text-align:center;"">CONSTANT_MethodHandle_info<\/td><td style=""text-align:center;"">15<\/td><td style=""text-align:center;"">\u8868\u793a\u65b9\u6cd5\u53e5\u67c4<\/td><\/tr><tr><td style=""text-align:center;"">CONSTANT_InvokeDynamic_info<\/td><td style=""text-align:center;"">18<\/td><td style=""text-align:center;"">\u8868\u793a\u4e00\u4e2a\u52a8\u6001\u65b9\u6cd5\u8c03\u7528\u70b9<\/td><\/tr><\/tbody><\/table><\/figure><\/p>\n
<code>.class<\/code> \u6587\u4ef6\u53ef\u4ee5\u901a\u8fc7<code>javap <span style=""font-family:"Open Sans", "Clear Sans", "Helvetica Neue", Helvetica, Arial, sans-serif"">-<\/span>v class\u7c7b\u540d<\/code> \u6307\u4ee4\u6765\u770b\u4e00\u4e0b\u5176\u5e38\u91cf\u6c60\u4e2d\u7684\u4fe1\u606f(<code>javap <span style=""font-family:"Open Sans", "Clear Sans", "Helvetica Neue", Helvetica, Arial, sans-serif"">-<\/span>v class\u7c7b\u540d<span style=""font-family:"Open Sans", "Clear Sans", "Helvetica Neue", Helvetica, Arial, sans-serif"">-<\/span>> temp.txt<\/code> \uff1a\u5c06\u7ed3\u679c\u8f93\u51fa\u5230 temp.txt \u6587\u4ef6)\u3002<\/p>\n
<h3>2.4 \u8bbf\u95ee\u6807\u5fd7<\/h3><\/p>\n
\u5728\u5e38\u91cf\u6c60\u7ed3\u675f\u4e4b\u540e\uff0c\u7d27\u63a5\u7740\u7684\u4e24\u4e2a\u5b57\u8282\u4ee3\u8868\u8bbf\u95ee\u6807\u5fd7\uff0c\u8fd9\u4e2a\u6807\u5fd7\u7528\u4e8e\u8bc6\u522b\u4e00\u4e9b\u7c7b\u6216\u8005\u63a5\u53e3\u5c42\u6b21\u7684\u8bbf\u95ee\u4fe1\u606f\uff0c\u5305\u62ec\uff1a\u8fd9\u4e2a Class \u662f\u7c7b\u8fd8\u662f\u63a5\u53e3\uff0c\u662f\u5426\u4e3a public \u6216\u8005 abstract \u7c7b\u578b\uff0c\u5982\u679c\u662f\u7c7b\u7684\u8bdd\u662f\u5426\u58f0\u660e\u4e3a final \u7b49\u7b49\u3002<\/p>\n
\u7c7b\u8bbf\u95ee\u548c\u5c5e\u6027\u4fee\u9970\u7b26:<\/p>\n
<img src=""https:\/\/my-blog-to-use.oss-cn-beijing.aliyuncs.com\/2019-6\/%E8%AE%BF%E9%97%AE%E6%A0%87%E5%BF%97.png"" referrerpolicy=""no-referrer"" alt=""\u7c7b\u8bbf\u95ee\u548c\u5c5e\u6027\u4fee\u9970\u7b26"" style=""width: 100%;""><\/p>\n
\u6211\u4eec\u5b9a\u4e49\u4e86\u4e00\u4e2a Employee \u7c7b<\/p>\n
<pre><code>package top.snailclimb.bean;public class Employee { …}<\/code><\/pre><\/p>\n
\u901a\u8fc7<code>javap <span style=""font-family:"Open Sans", "Clear Sans", "Helvetica Neue", Helvetica, Arial, sans-serif"">-<\/span>v class\u7c7b\u540d<\/code> \u6307\u4ee4\u6765\u770b\u4e00\u4e0b\u7c7b\u7684\u8bbf\u95ee\u6807\u5fd7\u3002<\/p>\n
<img src=""https:\/\/my-blog-to-use.oss-cn-beijing.aliyuncs.com\/2019-6\/%E6%9F%A5%E7%9C%8B%E7%B1%BB%E7%9A%84%E8%AE%BF%E9%97%AE%E6%A0%87%E5%BF%97.png"" referrerpolicy=""no-referrer"" alt=""\u67e5\u770b\u7c7b\u7684\u8bbf\u95ee\u6807\u5fd7"" style=""width: 100%;""><\/p>\n
<h3>2.5 \u5f53\u524d\u7c7b\u7d22\u5f15,\u7236\u7c7b\u7d22\u5f15\u4e0e\u63a5\u53e3\u7d22\u5f15\u96c6\u5408<\/h3><\/p>\n
<pre><code> u2 this_class;\/\/\u5f53\u524d\u7c7b u2 super_class;\/\/\u7236\u7c7b u2 interfaces_count;\/\/\u63a5\u53e3 u2 interfaces[interfaces_count];\/\/\u4e00\u4e2a\u96f7\u53ef\u4ee5\u5b9e\u73b0\u591a\u4e2a\u63a5\u53e3<\/code><\/pre><\/p>\n
<strong>\u7c7b\u7d22\u5f15\u7528\u4e8e\u786e\u5b9a\u8fd9\u4e2a\u7c7b\u7684\u5168\u9650\u5b9a\u540d\uff0c\u7236\u7c7b\u7d22\u5f15\u7528\u4e8e\u786e\u5b9a\u8fd9\u4e2a\u7c7b\u7684\u7236\u7c7b\u7684\u5168\u9650\u5b9a\u540d\uff0c\u7531\u4e8e Java \u8bed\u8a00\u7684\u5355\u7ee7\u627f\uff0c\u6240\u4ee5\u7236\u7c7b\u7d22\u5f15\u53ea\u6709\u4e00\u4e2a\uff0c\u9664\u4e86 <code>java.lang.Object<\/code> \u4e4b\u5916\uff0c\u6240\u6709\u7684 java \u7c7b\u90fd\u6709\u7236\u7c7b\uff0c\u56e0\u6b64\u9664\u4e86 <code>java.lang.Object<\/code> \u5916\uff0c\u6240\u6709 Java \u7c7b\u7684\u7236\u7c7b\u7d22\u5f15\u90fd\u4e0d\u4e3a 0\u3002<\/strong><\/p>\n
<strong>\u63a5\u53e3\u7d22\u5f15\u96c6\u5408\u7528\u6765\u63cf\u8ff0\u8fd9\u4e2a\u7c7b\u5b9e\u73b0\u4e86\u90a3\u4e9b\u63a5\u53e3\uff0c\u8fd9\u4e9b\u88ab\u5b9e\u73b0\u7684\u63a5\u53e3\u5c06\u6309<code>implents<\/code>(\u5982\u679c\u8fd9\u4e2a\u7c7b\u672c\u8eab\u662f\u63a5\u53e3\u7684\u8bdd\u5219\u662f<code>extends<\/code>) \u540e\u7684\u63a5\u53e3\u987a\u5e8f\u4ece\u5de6\u5230\u53f3\u6392\u5217\u5728\u63a5\u53e3\u7d22\u5f15\u96c6\u5408\u4e2d\u3002<\/strong><\/p>\n
<h3>2.6 \u5b57\u6bb5\u8868\u96c6\u5408<\/h3><\/p>\n
<pre><code> u2 fields_count;\/\/Class \u6587\u4ef6\u7684\u5b57\u6bb5\u7684\u4e2a\u6570 field_info fields[fields_count];\/\/\u4e00\u4e2a\u7c7b\u4f1a\u53ef\u4ee5\u6709\u4e2a\u5b57\u6bb5<\/code><\/pre><\/p>\n
\u5b57\u6bb5\u8868\uff08field info\uff09\u7528\u4e8e\u63cf\u8ff0\u63a5\u53e3\u6216\u7c7b\u4e2d\u58f0\u660e\u7684\u53d8\u91cf\u3002\u5b57\u6bb5\u5305\u62ec\u7c7b\u7ea7\u53d8\u91cf\u4ee5\u53ca\u5b9e\u4f8b\u53d8\u91cf\uff0c\u4f46\u4e0d\u5305\u62ec\u5728\u65b9\u6cd5\u5185\u90e8\u58f0\u660e\u7684\u5c40\u90e8\u53d8\u91cf\u3002<\/p>\n
<strong>field info(\u5b57\u6bb5\u8868) \u7684\u7ed3\u6784:<\/strong><\/p>\n
<img src=""https:\/\/my-blog-to-use.oss-cn-beijing.aliyuncs.com\/2019-6\/%E5%AD%97%E6%AE%B5%E8%A1%A8%E7%9A%84%E7%BB%93%E6%9E%84.png"" referrerpolicy=""no-referrer"" alt=""\u5b57\u6bb5\u8868\u7684\u7ed3\u6784 ""><\/p>\n
<ul><li><strong>access_flags:<\/strong> \u5b57\u6bb5\u7684\u4f5c\u7528\u57df\uff08<code>public<\/code> ,<code>private<\/code>,<code>protected<\/code>\u4fee\u9970\u7b26\uff09\uff0c\u662f\u5b9e\u4f8b\u53d8\u91cf\u8fd8\u662f\u7c7b\u53d8\u91cf\uff08<code>static<\/code>\u4fee\u9970\u7b26\uff09,\u53ef\u5426\u88ab\u5e8f\u5217\u5316\uff08transient \u4fee\u9970\u7b26\uff09,\u53ef\u53d8\u6027\uff08final\uff09,\u53ef\u89c1\u6027\uff08volatile \u4fee\u9970\u7b26\uff0c\u662f\u5426\u5f3a\u5236\u4ece\u4e3b\u5185\u5b58\u8bfb\u5199\uff09\u3002<\/li><li><strong>name_index:<\/strong> \u5bf9\u5e38\u91cf\u6c60\u7684\u5f15\u7528\uff0c\u8868\u793a\u7684\u5b57\u6bb5\u7684\u540d\u79f0\uff1b<\/li><li><strong>descriptor_index:<\/strong> \u5bf9\u5e38\u91cf\u6c60\u7684\u5f15\u7528\uff0c\u8868\u793a\u5b57\u6bb5\u548c\u65b9\u6cd5\u7684\u63cf\u8ff0\u7b26\uff1b<\/li><li><strong>attributes_count:<\/strong> \u4e00\u4e2a\u5b57\u6bb5\u8fd8\u4f1a\u62e5\u6709\u4e00\u4e9b\u989d\u5916\u7684\u5c5e\u6027\uff0cattributes_count \u5b58\u653e\u5c5e\u6027\u7684\u4e2a\u6570\uff1b<\/li><li><strong>attributes[attributes_count]:<\/strong> \u5b58\u653e\u5177\u4f53\u5c5e\u6027\u5177\u4f53\u5185\u5bb9\u3002<\/li><\/ul><\/p>\n
\u4e0a\u8ff0\u8fd9\u4e9b\u4fe1\u606f\u4e2d\uff0c\u5404\u4e2a\u4fee\u9970\u7b26\u90fd\u662f\u5e03\u5c14\u503c\uff0c\u8981\u4e48\u6709\u67d0\u4e2a\u4fee\u9970\u7b26\uff0c\u8981\u4e48\u6ca1\u6709\uff0c\u5f88\u9002\u5408\u4f7f\u7528\u6807\u5fd7\u4f4d\u6765\u8868\u793a\u3002\u800c\u5b57\u6bb5\u53eb\u4ec0\u4e48\u540d\u5b57\u3001\u5b57\u6bb5\u88ab\u5b9a\u4e49\u4e3a\u4ec0\u4e48\u6570\u636e\u7c7b\u578b\u8fd9\u4e9b\u90fd\u662f\u65e0\u6cd5\u56fa\u5b9a\u7684\uff0c\u53ea\u80fd\u5f15\u7528\u5e38\u91cf\u6c60\u4e2d\u5e38\u91cf\u6765\u63cf\u8ff0\u3002<\/p>\n
<strong>\u5b57\u6bb5\u7684 access_flags \u7684\u53d6\u503c:<\/strong><\/p>\n
<img src=""https:\/\/my-blog-to-use.oss-cn-beijing.aliyuncs.com\/2019-6\/%E5%AD%97%E6%AE%B5%E7%9A%84access_flags%E7%9A%84%E5%8F%96%E5%80%BC.png"" referrerpolicy=""no-referrer"" alt=""\u5b57\u6bb5\u7684access_flags\u7684\u53d6\u503c"" style=""width: 100%;""><\/p>\n
<h3>2.7 \u65b9\u6cd5\u8868\u96c6\u5408<\/h3><\/p>\n
<pre><code> u2 methods_count;\/\/Class \u6587\u4ef6\u7684\u65b9\u6cd5\u7684\u6570\u91cf method_info methods[methods_count];\/\/\u4e00\u4e2a\u7c7b\u53ef\u4ee5\u6709\u4e2a\u591a\u4e2a\u65b9\u6cd5<\/code><\/pre><\/p>\n
methods_count \u8868\u793a\u65b9\u6cd5\u7684\u6570\u91cf\uff0c\u800c method_info \u8868\u793a\u7684\u65b9\u6cd5\u8868\u3002<\/p>\n
Class \u6587\u4ef6\u5b58\u50a8\u683c\u5f0f\u4e2d\u5bf9\u65b9\u6cd5\u7684\u63cf\u8ff0\u4e0e\u5bf9\u5b57\u6bb5\u7684\u63cf\u8ff0\u51e0\u4e4e\u91c7\u7528\u4e86\u5b8c\u5168\u4e00\u81f4\u7684\u65b9\u5f0f\u3002\u65b9\u6cd5\u8868\u7684\u7ed3\u6784\u5982\u540c\u5b57\u6bb5\u8868\u4e00\u6837\uff0c\u4f9d\u6b21\u5305\u62ec\u4e86\u8bbf\u95ee\u6807\u5fd7\u3001\u540d\u79f0\u7d22\u5f15\u3001\u63cf\u8ff0\u7b26\u7d22\u5f15\u3001\u5c5e\u6027\u8868\u96c6\u5408\u51e0\u9879\u3002<\/p>\n
<strong>method_info(\u65b9\u6cd5\u8868\u7684) \u7ed3\u6784:<\/strong><\/p>\n
<img src=""https:\/\/my-blog-to-use.oss-cn-beijing.aliyuncs.com\/2019-6\/%E6%96%B9%E6%B3%95%E8%A1%A8%E7%9A%84%E7%BB%93%E6%9E%84.png"" referrerpolicy=""no-referrer"" alt=""\u65b9\u6cd5\u8868\u7684\u7ed3\u6784""><\/p>\n
<strong>\u65b9\u6cd5\u8868\u7684 access_flag \u53d6\u503c\uff1a<\/strong><\/p>\n
<img src=""https:\/\/my-blog-to-use.oss-cn-beijing.aliyuncs.com\/2019-6\/%E6%96%B9%E6%B3%95%E8%A1%A8%E7%9A%84access_flag%E7%9A%84%E6%89%80%E6%9C%89%E6%A0%87%E5%BF%97%E4%BD%8D.png"" referrerpolicy=""no-referrer"" alt=""\u65b9\u6cd5\u8868\u7684 access_flag \u53d6\u503c"" style=""width: 100%;""><\/p>\n
\u6ce8\u610f\uff1a\u56e0\u4e3a<code>volatile<\/code>\u4fee\u9970\u7b26\u548c<code>transient<\/code>\u4fee\u9970\u7b26\u4e0d\u53ef\u4ee5\u4fee\u9970\u65b9\u6cd5\uff0c\u6240\u4ee5\u65b9\u6cd5\u8868\u7684\u8bbf\u95ee\u6807\u5fd7\u4e2d\u6ca1\u6709\u8fd9\u4e24\u4e2a\u5bf9\u5e94\u7684\u6807\u5fd7\uff0c\u4f46\u662f\u589e\u52a0\u4e86<code>synchronized<\/code>\u3001<code>native<\/code>\u3001<code>abstract<\/code>\u7b49\u5173\u952e\u5b57\u4fee\u9970\u65b9\u6cd5\uff0c\u6240\u4ee5\u4e5f\u5c31\u591a\u4e86\u8fd9\u4e9b\u5173\u952e\u5b57\u5bf9\u5e94\u7684\u6807\u5fd7\u3002<\/p>\n
<h3>2.8 \u5c5e\u6027\u8868\u96c6\u5408<\/h3><\/p>\n
<pre><code> u2 attributes_count;\/\/\u6b64\u7c7b\u7684\u5c5e\u6027\u8868\u4e2d\u7684\u5c5e\u6027\u6570 attribute_info attributes[attributes_count];\/\/\u5c5e\u6027\u8868\u96c6\u5408<\/code><\/pre><\/p>\n
\u5728 Class \u6587\u4ef6\uff0c\u5b57\u6bb5\u8868\uff0c\u65b9\u6cd5\u8868\u4e2d\u90fd\u53ef\u4ee5\u643a\u5e26\u81ea\u5df1\u7684\u5c5e\u6027\u8868\u96c6\u5408\uff0c\u4ee5\u7528\u4e8e\u63cf\u8ff0\u67d0\u4e9b\u573a\u666f\u4e13\u6709\u7684\u4fe1\u606f\u3002\u4e0e Class \u6587\u4ef6\u4e2d\u5176\u5b83\u7684\u6570\u636e\u9879\u76ee\u8981\u6c42\u7684\u987a\u5e8f\u3001\u957f\u5ea6\u548c\u5185\u5bb9\u4e0d\u540c\uff0c\u5c5e\u6027\u8868\u96c6\u5408\u7684\u9650\u5236\u7a0d\u5fae\u5bbd\u677e\u4e00\u4e9b\uff0c\u4e0d\u518d\u8981\u6c42\u5404\u4e2a\u5c5e\u6027\u8868\u5177\u6709\u4e25\u683c\u7684\u987a\u5e8f\uff0c\u5e76\u4e14\u53ea\u8981\u4e0d\u4e0e\u5df2\u6709\u7684\u5c5e\u6027\u540d\u91cd\u590d\uff0c\u4efb\u4f55\u4eba\u5b9e\u73b0\u7684\u7f16\u8bd1\u5668\u90fd\u53ef\u4ee5\u5411\u5c5e\u6027\u8868\u4e2d\u5199 \u5165\u81ea\u5df1\u5b9a\u4e49\u7684\u5c5e\u6027\u4fe1\u606f\uff0cJava \u865a\u62df\u673a\u8fd0\u884c\u65f6\u4f1a\u5ffd\u7565\u6389\u5b83\u4e0d\u8ba4\u8bc6\u7684\u5c5e\u6027\u3002<\/p>\n
<h2>\u53c2\u8003<\/h2><\/p>\n
<ul><li><a href=""https:\/\/docs.oracle.com\/javase\/specs\/jvms\/se7\/html\/jvms-4.html"" target=""_blank"" class=""url"">https:\/\/docs.oracle.com\/javase\/specs\/jvms\/se7\/html\/jvms-4.html<\/a><\/li><li><a href=""https:\/\/coolshell.cn\/articles\/9229.html"" target=""_blank"" class=""url"">https:\/\/coolshell.cn\/articles\/9229.html<\/a><\/li><li><a href=""https:\/\/blog.csdn.net\/luanlouis\/article\/details\/39960815"" target=""_blank"" class=""url"">https:\/\/blog.csdn.net\/luanlouis\/article\/details\/39960815<\/a><\/li><li>\u300a\u5b9e\u6218 Java \u865a\u62df\u673a\u300b<\/li><\/ul><\/p>\n
<pre><code> "“`
\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
“`” \u6839\u636e Java \u865a\u62df\u673a\u89c4\u8303\uff0c\u7c7b\u6587\u4ef6\u7531\u5355\u4e2a ClassFile \u7ed3\u6784\u7ec4\u6210\uff1a &l […]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-37525","post","type-post","status-publish","format-standard","hentry","category-c"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/37525","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=37525"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/37525\/revisions"}],"predecessor-version":[{"id":37526,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/37525\/revisions\/37526"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=37525"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=37525"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=37525"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}