{"id":93483,"date":"2020-03-27T23:11:42","date_gmt":"2020-03-27T15:11:42","guid":{"rendered":"http:\/\/4563.org\/?p=93483"},"modified":"2020-05-20T06:13:58","modified_gmt":"2020-05-19T22:13:58","slug":"%e5%85%b3%e4%ba%8e-java-%e5%ad%97%e8%8a%82%e7%a0%81%e7%9a%84%e8%af%b7%e6%95%99-2","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=93483","title":{"rendered":"\u5173\u4e8e Java \u5b57\u8282\u7801\u7684\u8bf7\u6559"},"content":{"rendered":"
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\u5173\u4e8e Java \u5b57\u8282\u7801\u7684\u8bf7\u6559 <\/h1>\n

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\u8cc7\u6df1\u5927\u4f6c : lqw3030 <\/span> <\/i> 21<\/span> <\/div>\n
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  • \u4f8b\u5982\uff0c\u6211\u6709\u8fd9\u4e48\u4e00\u4efd\u4ee3\u7801<\/li>\n<\/ul>\n
    package lock;  public class ByteCodeTest {     private volatile String name=\"view\";     public void work(){         name+=\"hello\";     } } <\/code><\/pre>\n
      \n
    • \u7f16\u8bd1\u540e\uff0c\u901a\u8fc7\u5b57\u8282\u7801\u5de5\u5177\u67e5\u770b<\/li>\n<\/ul>\n
      \/\/ class version 56.0 (56) \/\/ access flags 0x21 public class lock\/ByteCodeTest {    \/\/ compiled from: ByteCodeTest.java   \/\/ access flags 0x19   public final static INNERCLASS java\/lang\/invoke\/MethodHandles$Lookup java\/lang\/invoke\/MethodHandles Lookup    \/\/ access flags 0x42   private volatile Ljava\/lang\/String; name    \/\/ access flags 0x1   public <init>()V    L0     LINENUMBER 3 L0     ALOAD 0     INVOKESPECIAL java\/lang\/Object.<init> ()V    L1     LINENUMBER 4 L1     ALOAD 0     LDC \"view\"     PUTFIELD lock\/ByteCodeTest.name : Ljava\/lang\/String;     RETURN    L2     LOCALVARIABLE this Llock\/ByteCodeTest; L0 L2 0     MAXSTACK = 2     MAXLOCALS = 1    \/\/ access flags 0x1   public work()V    L0     LINENUMBER 6 L0     ALOAD 0     DUP     GETFIELD lock\/ByteCodeTest.name : Ljava\/lang\/String;     INVOKEDYNAMIC makeConcatWithConstants(Ljava\/lang\/String;)Ljava\/lang\/String; [       \/\/ handle kind 0x6 : INVOKESTATIC       java\/lang\/invoke\/StringConcatFactory.makeConcatWithConstants(Ljava\/lang\/invoke\/MethodHandles$Lookup;Ljava\/lang\/String;Ljava\/lang\/invoke\/MethodType;Ljava\/lang\/String;[Ljava\/lang\/Object;)Ljava\/lang\/invoke\/CallSite;       \/\/ arguments:       \"u0001hello\"     ]     PUTFIELD lock\/ByteCodeTest.name : Ljava\/lang\/String;    L1     LINENUMBER 7 L1     RETURN    L2     LOCALVARIABLE this Llock\/ByteCodeTest; L0 L2 0     MAXSTACK = 2     MAXLOCALS = 1 } <\/code><\/pre>\n
        \n
      • \u60f3\u8bf7\u6559\u4e0b\u5982\u4f55\u9605\u8bfb\u4e0a\u8ff0\u6307\u4ee4\u8bed\u6cd5<\/li>\n
      • \u6216\u662f google \u4ec0\u4e48\u5173\u952e\u5b57\u53ef\u4ee5\u641c\u5230\u76f8\u5173\u5185\u5bb9<\/li>\n<\/ul><\/div>\n
         \u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (11<\/span>)        <\/div>\n
         <\/div>\n<\/p><\/div>\n<\/p><\/div>\n
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           \u8cc7\u6df1\u5927\u4f6c : anerinck <\/span>  <\/div>\n
           <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                       \u6211\u89c9\u5f97\u76f4\u63a5\u770b\u5b57\u8282\u7801\u7684\u5341\u516d\u8fdb\u5236\u6bd4\u9605\u8bfb\u53cd\u7f16\u8bd1\u8981\u6e05\u695a\u3002\u3002\u5982\u679c\u662f\u8981\u4e86\u89e3\u6307\u4ee4\u7684\u8bdd\u4e0d\u5982\u53bb\u641c\u7d22\u4e00\u4e0b jvm \u7684\u6307\u4ee4\u96c6\u4e00\u7c7b\u7684\uff1f                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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           \u8cc7\u6df1\u5927\u4f6c : misaka19000 <\/span>  <\/div>\n
           <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                       \u300a\u6df1\u5165\u7406\u89e3 Java \u865a\u62df\u673a\u300b\u7b2c 6 \u7ae0                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
        • \n
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           \u8cc7\u6df1\u5927\u4f6c : CRUD <\/span>  <\/div>\n
           <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                       Java \u865a\u62df\u673a\u6307\u4ee4\u96c6\uff1a https:\/\/docs.oracle.com\/javase\/specs\/jvms\/se8\/html\/jvms-6.html                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
        • \n
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           \u8cc7\u6df1\u5927\u4f6c : guxingke <\/span>  <\/div>\n
           <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                       https:\/\/github.com\/guxingke\/mini-jvm <\/p>\n
          java \u5b9e\u73b0\u7684\u89e3\u91ca\u5b57\u8282\u7801\u7684\u865a\u62df\u673a \u53ef\u4ee5\u4e86\u89e3\u4e00\u4e0b                                                            <\/p><\/div>\n<\/p><\/div>\n<\/li>\n
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           \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : lqw3030 <\/span>  <\/div>\n
           <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                       @anerinck 
          @misaka19000 
          @CRUD 
          @guxingke 
          \u592a\u68d2\u4e86,\u611f\u8c22\u5404\u4f4d                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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           \u8cc7\u6df1\u5927\u4f6c : maokabc <\/span>  <\/div>\n
           <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                       java \u865a\u62df\u673a\u89c4\u8303\uff0c\u6216\u8005\u53ef\u4ee5\u770b jasmin \u7684\u8bed\u6cd5\uff0c\u611f\u89c9\u6bd4\u8fd9\u4e2a\u66f4\u597d\u7406\u89e3\uff0c\u8fd8\u80fd\u4fee\u6539\u4e86\u518d\u7f16\u8bd1\u56de class                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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           \u8cc7\u6df1\u5927\u4f6c : choiwanxy <\/span>  <\/div>\n
           <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                       \u9996\u5148\u4f60\u8981\u5206\u5f97\u6e05\u54ea\u91cc\u662f\u4ec0\u4e48\uff0c\u6bd4\u5982\u54ea\u91cc\u662f\u5e38\u91cf\u6c60\uff0c\u54ea\u91cc\u662f\u65e0\u53c2\u6784\u67b6\u51fd\u6570\uff0c\u54ea\u91cc\u662f\u65b9\u6cd5\u5bf9\u5e94\u7684\u5b57\u8282\u7801\u3002\u627e\u5230\u4f60\u8981\u770b\u7684\u65b9\u6cd5\uff0c\u770b jvm \u6307\u4ee4\uff0c\u4e00\u4e2a\u4e2a\u53bb\u67e5\u662f\u4ec0\u4e48\u610f\u601d\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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           \u8cc7\u6df1\u5927\u4f6c : itning <\/span>  <\/div>\n
           <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                       \u4e0d\u8981\u8138\u4e00\u4e0b
          https:\/\/blog.itning.top\/post\/2020\/04\/10\/jvm%E7%B3%BB%E5%88%972-class%E6%96%87%E4%BB%B6%E6%A0%BC%E5%BC%8F\/                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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           \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : lqw3030 <\/span>  <\/div>\n
           <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                       @maokabc 
          @choiwanxy 
          @itning 
          \u6709\u8ba4\u771f\u53bb\u770b\uff0c\u611f\u8c22\u54c8                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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           \u8cc7\u6df1\u5927\u4f6c : CFM880 <\/span>  <\/div>\n
           <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                       jclasslib idea \u63d2\u4ef6\uff0c\u5e38\u91cf\u6c60\uff0c\u65b9\u6cd5\u533a\uff0c\u70b9\u51fb\u6307\u4ee4\u53ef\u4ee5\u8df3\u8f6c\u5230#3 \u8bf4\u7684\u7f51\u9875\u4e2d\u7684\u6307\u5b9a\u6307\u4ee4
          \"\u5173\u4e8e <\/div>\n<\/p><\/div>\n<\/li>\n
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           \u8cc7\u6df1\u5927\u4f6c : CFM880 <\/span>  <\/div>\n
           <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                       https:\/\/docs.oracle.com\/javase\/specs\/jvms\/se8\/html\/jvms-4.html
          \u8fd9\u4e00\u7ae0\u4ecb\u7ecd\u4e86 ClassFile Structure\uff0c\u5148\u6574\u4f53\u4e86\u89e3\u5b57\u8282\u7801\u6587\u4ef6\u7ed3\u6784\uff0c\u7ed3\u6784\u5d4c\u5957\u7ed3\u6784\uff0c\u540e\u9762\u518d\u5230\u65b9\u6cd5\u533a\u7684\u6307\u4ee4\uff0c\u6bd4\u8f83\u5bb9\u6613\u4e00\u4e9b\uff0c\u76f4\u63a5\u4e0a\u6307\u4ee4\u96c6\uff0c\u53ef\u4ee5\u6309\u7167\u5b57\u8282\u7801\u6587\u4ef6\u7ed3\u6784\u89c4\u5b9a\u7684\u5b57\u8282\u6765\u5206\u6790\u4e00\u4e0b
          ClassFile {
           u4 magic; #u4 4 \u4e2a\u5b57\u8282\u9b54\u6570
           u2 minor_version; #2 \u4e2a\u5b57\u8282\u5c0f\u7248\u672c\u53f7
           u2 major_version; 
           u2 constant_pool_count;
           cp_info constant_pool[constant_pool_count-1]; 
           u2 access_flags;
           u2 this_class;
           u2 super_class;
           u2 interfaces_count;
           u2 interfaces[interfaces_count];
           u2 fields_count;
           field_info fields[fields_count];
           u2 methods_count;
           method_info methods[methods_count];
           u2 attributes_count;
           attribute_info attributes[attributes_count];
          }                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
        • \n","protected":false},"excerpt":{"rendered":"
          \u5173\u4e8e Java \u5b57\u8282\u7801\u7684\u8bf7\u6559 \u8cc7\u6df1…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/93483"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=93483"}],"version-history":[{"count":1,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/93483\/revisions"}],"predecessor-version":[{"id":93487,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/93483\/revisions\/93487"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=93483"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=93483"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=93483"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}