{"id":1388,"date":"2019-09-02T11:21:46","date_gmt":"2019-09-02T03:21:46","guid":{"rendered":"http:\/\/www.sniper97.cn\/?p=1388"},"modified":"2019-09-02T11:21:46","modified_gmt":"2019-09-02T03:21:46","slug":"%e3%80%90java%e8%99%9a%e6%8b%9f%e6%9c%ba%e3%80%91%e7%b1%bb%e6%96%87%e4%bb%b6%e7%bb%93%e6%9e%84","status":"publish","type":"post","link":"http:\/\/www.sniper97.cn\/index.php\/note\/jvm\/1388\/","title":{"rendered":"\u3010Java\u865a\u62df\u673a\u3011\u7c7b\u6587\u4ef6\u7ed3\u6784"},"content":{"rendered":"\n<p>\u8fd9\u4e00\u8282\u4e3b\u8981\u8bb2\u8ff0\u7c7b\u6587\u4ef6\uff08.class\uff09\u7684\u6587\u4ef6\u7ed3\u6784\u3002<\/p>\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"332\" height=\"605\" src=\"http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-1.png\" alt=\"\" class=\"wp-image-1556\" srcset=\"http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-1.png 332w, http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-1-165x300.png 165w\" sizes=\"(max-width: 332px) 100vw, 332px\" \/><\/figure><\/div>\n\n\n<h2 class=\"wp-block-heading\">1.\u65e0\u5173\u6027\uff1a<\/h2>\n\n\n<p>\u5546\u4e1a\u673a\u6784\u548c\u5f00\u6e90\u673a\u6784\u5df2\u7ecf\u5728Java\u8bed\u8a00\u4e4b\u5916\u53d1\u5c55\u5904\u4e00\u5927\u6279\u5728Java\u865a\u62df\u673a\u4e4b\u4e0a\u8fd0\u884c\u7684\u8bed\u8a00\uff0c\u5982Clojure\u3001Groovy\u3001JRuby\u3001Jython\u3001Scala\u7b49\u3002\u4f7f\u7528\u8fd9\u4e9b\u8bed\u8a00\u7f16\u8bd1\u5668\u4e00\u6837\u53ef\u4ee5\u628a\u7a0b\u5e8f\u4ee3\u7801\u7f16\u8bd1\u6210Class\u6587\u4ef6\uff0c\u865a\u62df\u673a\u5e76\u4e0d\u5173\u5fc3Class\u6587\u4ef6\u7684\u6765\u6e90\u662f\u4f55\u79cd\u8bed\u8a00\u3002<\/p>\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"653\" height=\"336\" src=\"http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-2.png\" 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class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"284\" height=\"146\" src=\"http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-5.png\" alt=\"\" class=\"wp-image-1560\"\/><\/figure><\/div>\n\n\n<p>\u5c06\u7f16\u8bd1\u540e\u7684Class\u6587\u4ef6\u4f7f\u7528WinHex\u8fd9\u7c7b\u5341\u516d\u8fdb\u5236\u6587\u672c\u67e5\u770b\u5668\u8fdb\u884c\u67e5\u770b\u3002<\/p>\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"718\" height=\"383\" src=\"http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-6.png\" alt=\"\" class=\"wp-image-1561\" srcset=\"http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-6.png 718w, http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-6-300x160.png 300w\" sizes=\"(max-width: 718px) 100vw, 718px\" \/><\/figure><\/div>\n\n\n<p>\u53ef\u4ee5\u770b\u5230\u5341\u516d\u8fdb\u5236\u7f16\u7801\uff0c\u4e0b\u9762\u5c31\u4e00\u8d77\u5f00\u5206\u6790\u8fd9\u4e9b\u7f16\u7801\u90fd\u63cf\u8ff0\u4e86\u4e00\u4e9b\u4ec0\u4e48\u4e8b\u60c5\u3002<\/p>\n\n\n<h3 class=\"wp-block-heading\">2.1 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class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"547\" height=\"374\" src=\"http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-7.png\" alt=\"\" class=\"wp-image-1562\" srcset=\"http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-7.png 547w, http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-7-300x205.png 300w\" sizes=\"(max-width: 547px) 100vw, 547px\" \/><\/figure><\/div>\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"240\" height=\"76\" src=\"http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-8.png\" alt=\"\" class=\"wp-image-1563\"\/><\/figure><\/div>\n\n\n<p>\u4e0d\u540cJDK\u7248\u672c\u5bf9\u5e94\u7684\u7248\u672c\u53f7\u5982\u4e0b\uff1a<\/p>\n\n\n<p>JDK 1.8 = 52&nbsp;<br \/> JDK 1.7 = 51&nbsp;<br \/> JDK 1.6 =50&nbsp;<br \/> JDK 1.5 = 49&nbsp;<br \/> JDK 1.4 = 48&nbsp;<br \/> JDK 1.3 = 47&nbsp;<br \/> JDK 1.2 = 46&nbsp;<br \/> JDK 1.1 = 45<\/p>\n\n\n<h3 class=\"wp-block-heading\">2.2 \u5e38\u91cf\u6c60<\/h3>\n\n\n<p>\u7d27\u63a5\u7740\u4e3b\u6b21\u7248\u672c\u53f7\u4e4b\u540e\u7684\u662f\u5e38\u91cf\u6c60\u5165\u53e3\uff0c\u5e38\u91cf\u6c60\u53ef\u4ee5\u7406\u89e3\u4e3aClass\u6587\u4ef6\u4e4b\u4e2d\u7684\u8d44\u6e90\u4ed3\u5e93\uff0c\u5b83\u662fClass\u6587\u4ef6\u7ed3\u6784\u4e2d\u4e0e\u5176\u4ed6\u9879\u76ee\u5173\u8054\u6700\u591a\u7684\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u662f\u5360\u7528Class\u6587\u4ef6\u7a7a\u95f4\u6700\u5927\u7684\u6570\u636e\u9879\u76ee\u4e4b\u4e00\uff0c\u540c\u65f6\u5b83\u8fd8\u662f\u5728Class\u6587\u4ef6\u4e2d\u51fa\u73b0\u7684\u7b2c\u4e00\u4e2a\u8868\u7c7b\u578b\u6570\u636e\u9879\u76ee\u3002<\/p>\n\n\n<p>\u7531\u4e8e\u5e38\u91cf\u6c60\u7684\u5927\u5c0f\u662f\u4e0d\u56fa\u5b9a\u7684\uff0c\u6240\u4ee5\u5728\u5e38\u91cf\u6c60\u7684\u5165\u53e3\u9700\u8981\u653e\u7f6e\u4e00\u9879u2\u7c7b\u578b\u7684\u6570\u636e\uff0c\u4ee3\u8868\u5e38\u91cf\u6c60\u5bb9\u91cf\u8ba1\u6570\u503c\uff0c\u5e76\u4e14\u8fd9\u4e2a\u503c\u4e0ejava\u76840\u5f00\u59cb\u4e0d\u4e00\u6837\uff0c\u8fd9\u4e2a\u503c\u4ece1\u5f00\u59cb\uff0c\u4e5f\u5c31\u662f\u8bf4\u5982\u679c\u5927\u5c0f\u4e3a0x13\uff0c\u8fd9\u6837\u5e38\u91cf\u6c60\u5c31\u6709\u7f16\u53f7\u4ece1~18\u4e2a\u5e38\u91cf\u3002<\/p>\n\n\n<p>\u5e38\u91cf\u6c60\u4e2d\u4e3b\u8981\u5b58\u653e\u4e24\u5927\u7c7b\u5e38\u91cf\uff1a\u5b57\u9762\u91cf\u548c\u7b26\u53f7\u5f15\u7528\u3002<\/p>\n\n\n<p>\u5b57\u9762\u91cf\u6bd4\u8f83\u63a5\u8fd1Java\u8bed\u8a00\u5c42\u9762\u7684\u5e38\u91cf\u6982\u5ff5\uff0c\u5982\u6587\u672c\u5b57\u7b26\u4e32\u3001\u58f0\u660e\u4e3afinal\u7684\u5e38\u91cf\u503c\u7b49\u3002<\/p>\n\n\n<p>\u7b26\u53f7\u5f15\u7528\u5219\u5c5e\u4e8e\u7f16\u8bd1\u539f\u7406\u65b9\u9762\u7684\u6982\u5ff5\uff0c\u5305\u62ec\u4e86\u4e0b\u9762\u4e09\u7c7b\u5e38\u91cf\uff1a<\/p>\n\n\n<p>\u7c7b\u548c\u63a5\u53e3\u7684\u5168\u9650\u5b9a\u540d\uff1b<\/p>\n\n\n<p>\u5b57\u6bb5\u7684\u540d\u79f0\u548c\u63cf\u8ff0\u7b26\uff1b<\/p>\n\n\n<p>\u65b9\u6cd5\u7684\u540d\u79f0\u548c\u63cf\u8ff0\u7b26\u3002<\/p>\n\n\n<p>Java\u4ee3\u7801\u5728\u8fdb\u884cJavac\u7f16\u8bd1\u7684\u65f6\u5019\uff0c\u5e76\u4e0d\u50cfC\u548cC++\u90a3\u6837\u6709\u201c\u8fde\u63a5\u201d\u8fd9\u4e00\u6b65\u9aa4\uff0c\u800c\u662f\u5728\u865a\u62df\u673a\u52a0\u8f7dClass\u6587\u4ef6\u7684\u65f6\u5019\u8fdb\u884c\u52a8\u6001\u94fe\u63a5\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u5728Class\u6587\u4ef6\u4e2d\u4e0d\u4f1a\u4fdd\u5b58\u5404\u4e2a\u65b9\u6cd5\u3001\u5b57\u6bb5\u7684\u6700\u7ec8\u5185\u5b58\u5165\u53e3\u5730\u5740\uff0c\u4e5f\u5c31\u65e0\u6cd5\u76f4\u63a5\u88ab\u865a\u62df\u673a\u4f7f\u7528\u3002\u5f53\u865a\u62df\u673a\u8fd0\u884c\u65f6\uff0c\u9700\u8981\u4ece\u5e38\u91cf\u6c60\u83b7\u5f97\u5bf9\u5e94\u7b26\u53f7\u7684\u5f15\u7528\uff0c\u518d\u5728\u7c7b\u521b\u5efa\u65f6\u6216\u8fd0\u884c\u65f6\u89e3\u6790\u3001\u7ffb\u8bd1\u5230\u5177\u4f53\u7684\u5185\u5b58\u5730\u5740\u4e2d\u3002<\/p>\n\n\n<p>\u5728JDK1.7\u4e4b\u524d\u670914\u4e2d\u5e38\u91cf\u9879\u7c7b\u578b\uff0c\u4ed6\u4eec\u6bcf\u4e00\u79cd\u7c7b\u578b\u7684\u5177\u4f53\u8868\u7ed3\u6784\u6709\u4e0d\u4e00\u6837\uff0c\u5177\u4f53\u5982\u4e0b\uff1a<\/p>\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"831\" height=\"823\" src=\"http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-16.png\" alt=\"\" class=\"wp-image-1571\" srcset=\"http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-16.png 831w, http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-16-300x297.png 300w, http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-16-150x150.png 150w, http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-16-768x761.png 768w\" sizes=\"(max-width: 831px) 100vw, 831px\" \/><\/figure><\/div>\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"850\" height=\"526\" src=\"http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-14.png\" alt=\"\" class=\"wp-image-1569\" srcset=\"http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-14.png 850w, http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-14-300x186.png 300w, http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-14-768x475.png 768w\" sizes=\"(max-width: 850px) 100vw, 850px\" \/><\/figure>\n\n\n<p>\u5728\u7ffb\u8bd1\u4e4b\u524d\uff0c\u6211\u4eec\u53ef\u4ee5\u5148\u4f7f\u7528JDK\u81ea\u5e26\u7684\u5de5\u5177\u5728\u547d\u4ee4\u884c\u4e2d\u67e5\u770b\u5e38\u91cf\u6c60\u3002<\/p>\n\n\n<p>javap -verbose FILE_NAME<\/p>\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"734\" height=\"835\" src=\"http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-9.png\" alt=\"\" class=\"wp-image-1564\" srcset=\"http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-9.png 734w, http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-9-264x300.png 264w\" sizes=\"(max-width: 734px) 100vw, 734px\" \/><\/figure><\/div>\n\n\n<p>\u53ef\u4ee5\u770b\u5230\u786e\u5b9e\u6709\u7f16\u53f7\u4e3a1~18\u7684\u5e38\u91cf\u3002\u5e76\u4e14\u5728\u6bcf\u4e00\u79cd\u5e38\u91cf\u7f16\u53f7\u540e\u90fd\u6709\u4ed6\u4eec\u7684\u5e38\u91cf\u7c7b\u578b\uff08Methodref\u3001Fieldref\u3001Class\u3001Utf8\uff09<\/p>\n\n\n<p>\u6839\u636e\u8fd9\u4e2a\u8868\u6211\u4eec\u5c31\u53ef\u4ee5\u7ffb\u8bd1\u4e4b\u524d\u7684\u5b57\u8282\u7801\uff1a<\/p>\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"721\" height=\"779\" src=\"http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-11.png\" alt=\"\" class=\"wp-image-1566\" srcset=\"http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-11.png 721w, http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-11-278x300.png 278w\" sizes=\"(max-width: 721px) 100vw, 721px\" \/><\/figure><\/div>\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"556\" height=\"97\" src=\"http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-12.png\" alt=\"\" class=\"wp-image-1567\" srcset=\"http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-12.png 556w, http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-12-300x52.png 300w\" sizes=\"(max-width: 556px) 100vw, 556px\" \/><\/figure><\/div>\n\n\n<h3 class=\"wp-block-heading\">2.3 \u8bbf\u95ee\u6807\u5fd7<\/h3>\n\n\n<p>\u5728\u5e38\u91cf\u6c60\u7ed3\u675f\u4e4b\u540e\uff0c\u7d27\u63a5\u7740\u7684\u4e24\u4e2a\u5b57\u8282\u4ee3\u8868\u8bbf\u95ee\u6807\u5fd7\uff08access_flags\uff09\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\u4e2aClass\u662f\u7c7b\u8fd8\u662f\u63a5\u53e3\uff1b\u662f\u5426\u5b9a\u4e49\u4e3apublic\u7c7b\u578b\uff1b\u662f\u5426\u5b9a\u4e49\u4e3aabstract\u7c7b\u578b\uff1b\u5982\u679c\u662f\u7c7b\u7684\u8bdd\uff0c\u662f\u5426\u88ab\u58f0\u660e\u4e3afinal\u7b49\u3002<\/p>\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"847\" height=\"345\" src=\"http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-17.png\" alt=\"\" class=\"wp-image-1572\" srcset=\"http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-17.png 847w, http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-17-300x122.png 300w, http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-17-768x313.png 768w\" sizes=\"(max-width: 847px) 100vw, 847px\" \/><\/figure>\n\n\n<p>\u672c\u4f8b\u4e2d\uff0c\u53ea\u6709ACC_PUBLIC\u548cACC_SUPER\u4e3a\u771f\uff0c\u5176\u4f59\u4e3a\u5047\uff0c\u56e0\u6b64access_flags\u7684\u503c\u4e3a0x0001|0x0020=0x0021\u3002<\/p>\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"96\" height=\"108\" src=\"http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-18.png\" alt=\"\" class=\"wp-image-1573\"\/><\/figure><\/div>\n\n\n<h3 class=\"wp-block-heading\">2.4 \u7c7b\u7d22\u5f15\u3001\u7236\u7c7b\u7d22\u5f15\u4e0e\u63a5\u53e3\u7d22\u5f15\u96c6\u5408<\/h3>\n\n\n<p>\u7c7b\u7d22\u5f15\u548c\u7236\u7c7b\u7d22\u5f15\u90fd\u662f\u4e00\u4e2au2\u7c7b\u578b\u7684\u6570\u636e\uff0c\u800c\u63a5\u53e3\u7d22\u5f15\u96c6\u5408\u662f\u4e00\u7ec4u2\u7c7b\u578b\u7684\u6570\u636e\u7684\u96c6\u5408\uff0cClass\u6587\u4ef6\u4e2d\u7531\u8fd9\u4e09\u9879\u6570\u636e\u6765\u786e\u5b9a\u8fd9\u4e2a\u7c7b\u7684\u7ee7\u627f\u5173\u7cfb\u3002<\/p>\n\n\n<p>\u7c7b\u7d22\u5f15\u7528\u4e8e\u786e\u5b9a\u8fd9\u4e2a\u7c7b\u7684\u5168\u9650\u5b9a\u540d\u3002<\/p>\n\n\n<p>\u7236\u7c7b\u7d22\u5f15\u7528\u4e8e\u786e\u5b9a\u8fd9\u4e2a\u7c7b\u7684\u7236\u7c7b\u7684\u5168\u9650\u5b9a\u540d\u3002\u7531\u4e8eJava\u8bed\u8a00\u4e0d\u5141\u8bb8\u591a\u91cd\u7ee7\u627f\uff0c\u6240\u4ee5\u7236\u7c7b\u7d22\u5f15\u53ea\u6709\u4e00\u4e2a\uff0c\u9664\u4e86java.lang.Object\u4e4b\u5916\uff0c\u6240\u6709\u7684Java\u90fd\u6709\u7236\u7c7b\uff0c\u56e0\u6b64\u9664\u4e86\u8be5\u7c7b\u5916\uff0c\u6240\u6709\u7684Java\u7c7b\u7684\u7236\u7c7b\u7d22\u5f15\u90fd\u4e0d\u4e3a0\u3002<\/p>\n\n\n<p>\u63a5\u53e3\u7d22\u5f15\u96c6\u5408\u5c31\u662f\u7528\u6765\u63cf\u8ff0\u8fd9\u4e2a\u7c7b\u5b9e\u73b0\u4e86\u54ea\u4e9b\u63a5\u53e3\uff0c\u8fd9\u4e9b\u88ab\u5b9e\u73b0\u7684\u63a5\u53e3\u5c06\u6309\u7167implements\u8bed\u53e5\u540e\u7684\u63a5\u53e3\u987a\u5e8f\u4ece\u5de6\u5230\u53f3\u6392\u5217\u5728\u63a5\u53e3\u7d22\u5f15\u96c6\u5408\u4e2d\u3002<\/p>\n\n\n<p>\u56e0\u4e3a\u8be5\u7c7b\u5e76\u6ca1\u6709\u5b9e\u73b0\u63a5\u53e3\uff0c\u56e0\u6b64\u63a5\u53e3\u7d22\u5f15\u96c6\u5408\u5c31\u662f00 00<\/p>\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"265\" height=\"73\" src=\"http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-20.png\" alt=\"\" class=\"wp-image-1575\"\/><\/figure>\n\n\n<p>\u5bf9\u6bd4\u4e0b\u8868\uff0c\u53ef\u4ee5\u770b\u51fa\u8be5\u7c7b\u4e3aa\u7c7b\uff0c\u7236\u7c7b\u4e3aObject\u3001\u6ca1\u6709\u5b9e\u73b0\u63a5\u53e3\u3002<\/p>\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"618\" height=\"295\" src=\"http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-19.png\" alt=\"\" class=\"wp-image-1574\" srcset=\"http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-19.png 618w, http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-19-300x143.png 300w\" sizes=\"(max-width: 618px) 100vw, 618px\" \/><\/figure><\/div>\n\n\n<h3 class=\"wp-block-heading\">2.5 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class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"825\" height=\"291\" src=\"http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-22.png\" alt=\"\" class=\"wp-image-1577\" srcset=\"http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-22.png 825w, http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-22-300x106.png 300w, http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-22-768x271.png 768w\" sizes=\"(max-width: 825px) 100vw, 825px\" \/><\/figure><\/div>\n\n\n<p>\u5168\u9650\u5b9a\u540d\uff1axxx\/xxxx\/xxxxx<\/p>\n\n\n<p>\u7b80\u5355\u540d\uff1axxxxx<\/p>\n\n\n<p>\u5341\u516d\u8fdb\u5236\u673a\u5668\u7801\uff1a<\/p>\n\n\n<p><\/p>\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"447\" height=\"343\" src=\"http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-24.png\" alt=\"\" class=\"wp-image-1579\" srcset=\"http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-24.png 447w, http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-24-300x230.png 300w\" sizes=\"(max-width: 447px) 100vw, 447px\" \/><\/figure><\/div>\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"681\" height=\"90\" src=\"http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-23.png\" alt=\"\" class=\"wp-image-1578\" srcset=\"http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-23.png 681w, http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-23-300x40.png 300w\" sizes=\"(max-width: 681px) 100vw, 681px\" \/><\/figure><\/div>\n\n\n<p>\u4ece\u8fd9\u51e0\u4e2a\u6570\u636e\u4e2d\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u770b\u51fa\uff0c\u5b57\u6bb5\u8868\u957f\u5ea6\u4e3a1\uff0c\u4e3a\u79c1\u6709\u53d8\u91cf\uff0c\u540d\u5b57\u4e3am\uff0c\u7c7b\u578b\u4e3aint\u3002\u4e8e\u662f\u6211\u4eec\u53ef\u4ee5\u770b\u51faprivate int m;<\/p>\n\n\n<p>\u6700\u540e\u9762\u8fd8\u6709\u4e00\u4e2a\u7528\u6765\u5b58\u50a8\u989d\u5916\u5c5e\u6027\u7684\u8ba1\u6570\u5668\uff0c\u672c\u4f8b\u4e3a0\u3002<\/p>\n\n\n<h3 class=\"wp-block-heading\">2.6 \u65b9\u6cd5\u8868\u96c6\u5408<\/h3>\n\n\n<p>\u65b9\u6cd5\u91cc\u7684Java\u4ee3\u7801\uff0c\u7ecf\u8fc7\u7f16\u8bd1\u5668\u7f16\u8bd1\u6210\u5b57\u8282\u7801\u6307\u4ee4\u540e\uff0c\u5b58\u653e\u5728\u65b9\u6cd5\u5c5e\u6027\u8868\u96c6\u5408\u4e2d\u4e00\u4e2a\u540d\u4e3aCode\u7684\u5c5e\u6027\u91cc\u9762\uff0c\u5c5e\u6027\u8868\u4f5c\u4e3aClass\u6587\u4ef6\u683c\u5f0f\u4e2d\u6700\u5177\u6269\u5c55\u6027\u7684\u4e00\u79cd\u6570\u636e\u9879\u76ee\u3002<\/p>\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"824\" height=\"369\" src=\"http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-25.png\" alt=\"\" class=\"wp-image-1580\" srcset=\"http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-25.png 824w, http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-25-300x134.png 300w, http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-25-768x344.png 768w\" sizes=\"(max-width: 824px) 100vw, 824px\" \/><\/figure><\/div>\n\n\n<p>\u7b2c\u4e00\u4e2au2\u7c7b\u578b\u7684\u6570\u636e\u4e3a\u8ba1\u6570\u5668\u5bb9\u91cf\uff0c\u503c\u4e3a0x0002\uff0c\u4ee3\u8868\u96c6\u5408\u4e2d\u6709\u4e24\u4e2a\u65b9\u6cd5\uff08\u8fd9\u4e24\u4e2a\u65b9\u6cd5\u4e3a\u7f16\u8bd1\u5668\u6dfb\u52a0\u7684\u5b9e\u4f8b\u6784\u9020\u5668&lt;init>\u548c\u6e90\u7801\u4e2d\u7684\u65b9\u6cd5inc()\uff09\u3002\u7b2c\u4e00\u4e2a\u65b9\u6cd5\u7684\u8bbf\u95ee\u6807\u5fd7\u503c\u4e3a0x0001\uff0c\u4e5f\u5c31\u662f\u53ea\u6709ACC_PUBLIC\u4e3a\u771f\uff1b\u540d\u79f0\u7d22\u5f15\u4e3a0x0007\uff0c\u5bf9\u5e94\u4e3a&lt;init>\uff0c\u7136\u540e\u662f0x0008\uff0c\u4e3a\u63cf\u8ff0\u7b26\u7d22\u5f15\uff0c\u67e5\u5e38\u91cf\u6c60\u8868\u53ef\u77e5\u4e3a\uff08\uff09V\uff0c\u7136\u540e\u662f\u5c5e\u6027\u8ba1\u6570\u5668\u4e3a1\uff0c\u8bf4\u660e\u540e\u9762\u6709\u4e00\u4e2a\u5c5e\u6027\u3002\u7136\u540e\u662f\u5c5e\u6027\u540d\u7d22\u5f15\u4e3aCode\uff0c\u8bf4\u660e\u6b64\u5c5e\u6027\u662f\u65b9\u6cd5\u7684\u5b57\u8282\u7801\u63cf\u8ff0\u3002<\/p>\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"670\" height=\"224\" src=\"http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-26.png\" alt=\"\" class=\"wp-image-1581\" srcset=\"http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-26.png 670w, http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-26-300x100.png 300w\" sizes=\"(max-width: 670px) 100vw, 670px\" \/><\/figure><\/div>\n\n\n<p>\u4e0e\u5b57\u6bb5\u8868\u96c6\u5408\u76f8\u5bf9\u5e94\u7684\uff0c\u5982\u679c\u7236\u7c7b\u65b9\u6cd5\u5728\u5b50\u7c7b\u4e2d\u6ca1\u6709\u88ab\u91cd\u5199\uff0c\u65b9\u6cd5\u8868\u96c6\u5408\u4e2d\u5c31\u4e0d\u4f1a\u51fa\u73b0\u6765\u81ea\u7236\u7c7b\u7684\u65b9\u6cd5\u4fe1\u606f\u3002\u4f46\u540c\u6837\u7684\uff0c\u6709\u53ef\u80fd\u4f1a\u51fa\u73b0\u7531\u7f16\u8bd1\u5668\u81ea\u52a8\u6dfb\u52a0\u7684\u65b9\u6cd5\uff0c\u6700\u5178\u578b\u7684\u5c31\u662f\u7c7b\u6784\u9020\u5668&lt;init&gt;\u65b9\u6cd5\u548c\u5b9e\u4f8b\u6784\u9020\u5668&lt;init&gt;\u65b9\u6cd5\u3002<\/p>\n\n\n<p>\u5728Java\u8bed\u8a00\u4e2d\uff0c\u8981\u91cd\u8f7d\u4e00\u4e2a\u65b9\u6cd5\uff0c\u9664\u4e86\u8981\u4e0e\u539f\u65b9\u6cd5\u5177\u6709\u76f8\u540c\u7684\u7b80\u5355\u540d\u79f0\u4e4b\u5916\uff0c\u8fd8\u8981\u6c42\u5fc5\u987b\u62e5\u6709\u4e00\u4e2a\u4e0e\u539f\u65b9\u6cd5\u4e0d\u7528\u7684\u7279\u5f81\u7b7e\u540d\uff08\u5c31\u662f\u4e00\u4e2a\u65b9\u6cd5\u4e2d\u5404\u4e2a\u53c2\u6570\u5728\u5e38\u91cf\u6c60\u4e2d\u7684\u5b57\u6bb5\u7b26\u53f7\u5f15\u7528\u7684\u96c6\u5408\uff0c\u4e5f\u5c31\u662f\u56e0\u4e3a\u8fd4\u56de\u503c\u4e0d\u4f1a\u5305\u542b\u5728\u7279\u5f81\u7b7e\u540d\u4e2d\uff0c\u56e0\u6b64Java\u8bed\u8a00\u91cc\u9762\u662f\u65e0\u6cd5\u4ec5\u4ec5\u4f9d\u9760\u8fd4\u56de\u503c\u7684\u4e0d\u540c\u6765\u5bf9\u4e00\u4e2a\u5df2\u6709\u65b9\u6cd5\u8fdb\u884c\u91cd\u8f7d\u7684\uff09\u3002\u4f46\u662f\u5728Class\u6587\u4ef6\u683c\u5f0f\u4e2d\uff0c\u7279\u5f81\u7b7e\u540d\u7684\u8303\u56f4\u4f1a\u5927\u4e00\u4e9b\uff0c\u53ea\u8981\u63cf\u8ff0\u7b26\u4e0d\u662f\u5b8c\u5168\u4e00\u81f4\u7684\u4e24\u4e2a\u65b9\u6cd5\u4e5f\u53ef\u4ee5\u5171\u5b58\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u5982\u679c\u4e24\u4e2a\u65b9\u6cd5\u6709\u76f8\u540c\u7684\u540d\u79f0\u548c\u7279\u5f81\u7b7e\u540d\uff0c\u4f46\u8fd4\u56de\u503c\u4e0d\u540c\uff0c\u90a3\u4e48\u4e5f\u662f\u53ef\u4ee5\u5408\u6cd5\u5171\u5b58\u4e8e\u4e00\u4e2aClass\u6587\u4ef6\u4e2d\u7684\u3002<\/p>\n\n\n<h3 class=\"wp-block-heading\">2.7 \u5c5e\u6027\u8868\u96c6\u5408<\/h3>\n\n\n<h4 class=\"wp-block-heading\">2.7.1 Code\u5c5e\u6027<\/h4>\n\n\n<p>Java\u7a0b\u5e8f\u7ecf\u8fc7Javac\u7f16\u8bd1\u5668\u5904\u7406\u540e\uff0c\u6700\u7ec8\u53d8\u6210\u5b57\u8282\u7801\u6307\u4ee4\u5b58\u50a8\u5728Code\u5c5e\u6027\u5185\u3002<\/p>\n\n\n<p>Code\u5c5e\u6027\u7ed3\u6784\u5982\u4e0b\uff1a<\/p>\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"620\" height=\"783\" src=\"http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-27.png\" alt=\"\" class=\"wp-image-1582\" srcset=\"http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-27.png 620w, http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-27-238x300.png 238w\" sizes=\"(max-width: 620px) 100vw, 620px\" \/><\/figure>\n\n\n<p><strong>max_stack<\/strong>\u4ee3\u8868\u4e86\u64cd\u4f5c\u6570\u6808\u6df1\u5ea6\u7684\u6700\u5927\u503c\u3002\u5728\u65b9\u6cd5\u6267\u884c\u7684\u4efb\u610f\u65f6\u523b\uff0c\u64cd\u4f5c\u6570\u6808\u90fd\u4e0d\u4f1a\u8d85\u8fc7\u8fd9\u4e2a\u6df1\u5ea6\u3002\u865a\u62df\u673a\u5728\u8fd0\u884c\u7684\u65f6\u5019\u9700\u8981\u6839\u636e\u8fd9\u4e2a\u503c\u6765\u5206\u914d\u6808\u5e27\u4e2d\u7684\u64cd\u4f5c\u6808\u6df1\u5ea6\u3002<\/p>\n\n\n<p><strong>max_locals<\/strong>\u4ee3\u8868\u4e86\u5c40\u90e8\u53d8\u91cf\u8868\u6240\u9700\u7684\u5b58\u50a8\u7a7a\u95f4\u3002\u5728\u8fd9\u91cc\uff0cmax_locals\u7684\u5355\u4f4d\u662fSlot\uff0cSlot\u662f\u865a\u62df\u673a\u4e3a\u5c40\u90e8\u53d8\u91cf\u5206\u914d\u5185\u5b58\u6240\u4f7f\u7528\u7684\u6700\u5c0f\u5355\u4f4d\u3002\u5bf9byte\u3001char\u3001float\u3001int\u3001short\u3001boolean\u548creturnAddress\u7b49\u957f\u5ea6\u4e0d\u8d85\u8fc732\u4f4d\u7684\u6570\u636e\u7c7b\u578b\uff0c\u6bcf\u4e2a\u5c40\u90e8\u53d8\u91cf\u5360\u75281\u4e2aSlot\uff0c\u800cdouble\u548clong\u5219\u5360\u7528\u4e24\u4e2aSlot\u6765\u5b58\u653e\u3002<\/p>\n\n\n<p>\u65b9\u6cd5\u53c2\u6570\uff08\u5305\u62ec\u5b9e\u4f8b\u65b9\u6cd5\u4e2d\u7684this\uff09\u3001\u663e\u793a\u5f02\u5e38\u5904\u7406\u7684\u53c2\u6570\uff08try-catch\u4e2d\u7684\u5f02\u5e38\uff09\u3001\u65b9\u6cd5\u4f53\u4e2d\u5b9a\u4e49\u7684\u5c40\u90e8\u53d8\u91cf\u90fd\u9700\u8981\u4f7f\u7528\u5c40\u90e8\u53d8\u91cf\u6765\u5b58\u653e\u3002\u53e6\u5916\uff0c\u5e76\u4e0d\u662f\u5728\u65b9\u6cd5\u4e2d\u7528\u5230\u4e86\u591a\u5c11\u4e2a\u5c40\u90e8\u53d8\u91cf\uff0c\u5c31\u628a\u8fd9\u4e9b\u5c40\u90e8\u53d8\u91cf\u6240\u5360\u7684Slot\u4e4b\u548c\u4f5c\u4e3amax_locals\u7684\u503c\uff0c\u539f\u56e0\u662f\u5c40\u90e8\u53d8\u91cf\u8868\u4e2d\u7684Slot\u53ef\u4ee5\u91cd\u7528\uff0c\u5f53\u4ee3\u7801\u6267\u884c\u8d85\u8fc7\u4e00\u4e2a\u5c40\u90e8\u53d8\u91cf\u7684\u4f5c\u7528\u57df\u65f6\uff0c\u8fd9\u4e2a\u5c40\u90e8\u53d8\u91cf\u6240\u5360\u7684Slot\u53ef\u4ee5\u88ab\u5176\u4ed6\u5c40\u90e8\u53d8\u91cf\u6240\u91cd\u7528\uff0cJavac\u7f16\u8bd1\u5668\u4f1a\u6839\u636e\u53d8\u91cf\u7684\u4f5c\u7528\u57df\u6765\u5206\u914dSlot\u7ed9\u5404\u4e2a\u53d8\u91cf\u4f7f\u7528\uff0c\u7136\u540e\u8ba1\u7b97\u51famax_locals\u7684\u5927\u5c0f\u3002<\/p>\n\n\n<p><strong>code_length<\/strong>\u548c<strong>code<\/strong>\u7528\u6765\u5b58\u50a8Java\u6e90\u7a0b\u5e8f\u7f16\u8bd1\u540e\u751f\u6210\u7684\u5b57\u8282\u7801\u6307\u4ee4\u3002code_length\u4ee3\u8868\u5b57\u8282\u7801\u957f\u5ea6\uff0ccode\u7528\u6765\u5b58\u50a8\u5b57\u8282\u7801\u6307\u4ee4\u7684\u4e00\u7cfb\u5217\u5b57\u8282\u6d41\u3002\u4e00\u4e2au1\u4ee3\u8868\u4e00\u6761\u6307\u4ee4\uff0c\u4e5f\u5c31\u662f\u8bf4\u6700\u591a\u6709256\u79cd\u6307\u4ee4\uff0c\u76ee\u524djava\u865a\u62df\u673a\u89c4\u8303\u5df2\u7ecf\u5b9a\u4e49\u4e86\u5176\u4e2d\u7ea6200\u6761\u7f16\u7801\u503c\u5bf9\u5e94\u7684\u865a\u62df\u673a\u6307\u4ee4\u3002<\/p>\n\n\n<p>\u5173\u4e8ecode_length\uff0c\u867d\u7136\u662f\u4e00\u4e2au4\u7c7b\u578b\u5b57\u8282\uff0c\u4e5f\u5c31\u662f65535\u6761\u5b57\u8282\u7801\u6307\u4ee4\uff0c\u4f46\u662f\u5b83\u5b9e\u9645\u4e0a\u53ea\u662f\u7528\u4e86u2\u7684\u957f\u5ea6\uff0c\u5982\u679c\u8d85\u8fc7\u4e86\u8fd9\u4e2a\u9650\u5ea6\uff0c\u865a\u62df\u673a\u4e5f\u4f1a\u62d2\u7edd\u6267\u884c\u3002<\/p>\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"674\" height=\"295\" src=\"http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-28.png\" alt=\"\" class=\"wp-image-1583\" srcset=\"http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-28.png 674w, http:\/\/www.sniper97.cn\/wp-content\/uploads\/2019\/09\/\u56fe\u7247-28-300x131.png 300w\" sizes=\"(max-width: 674px) 100vw, 674px\" \/><\/figure><\/div>\n\n\n<h4 class=\"wp-block-heading\">2.7.2 Exceptions\u5c5e\u6027<\/h4>\n\n\n<h4 class=\"wp-block-heading\">2.7.3 LineNumberTable\u5c5e\u6027<\/h4>\n\n\n<h4 class=\"wp-block-heading\">2.7.4 LocalVariableTable\u5c5e\u6027<\/h4>\n\n\n<h4 class=\"wp-block-heading\">2.7.5 SourceFile\u5c5e\u6027<\/h4>\n\n\n<h4 class=\"wp-block-heading\">2.7.6 ConstantValue\u5c5e\u6027<\/h4>\n\n\n<h4 class=\"wp-block-heading\">2.7.7 InnerClasses\u5c5e\u6027<\/h4>\n\n\n<h4 class=\"wp-block-heading\">2.7.8 Deprecated\u548cSynthetic\u5c5e\u6027<\/h4>\n\n\n<h4 class=\"wp-block-heading\">2.7.9 StackMapTable\u5c5e\u6027<\/h4>\n\n\n<h4 class=\"wp-block-heading\">2.7.10 Signature\u5c5e\u6027<\/h4>\n\n\n<h4 class=\"wp-block-heading\">2.7.11 BootstrapMethods\u5c5e\u6027<\/h4>\n","protected":false},"excerpt":{"rendered":"<p>\u8fd9\u4e00\u8282\u4e3b\u8981\u8bb2\u8ff0\u7c7b\u6587\u4ef6\uff08.class\uff09\u7684\u6587\u4ef6\u7ed3\u6784\u3002 1.\u65e0\u5173\u6027\uff1a \u5546\u4e1a\u673a\u6784\u548c\u5f00\u6e90\u673a\u6784\u5df2\u7ecf\u5728Java\u8bed\u8a00 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