Java 查看运行生成的字节码文件 反汇编

Microsoft Windows [版本 10.0.18362.657]
        (c) 2019 Microsoft Corporation。保留所有权利。

        D:\大家保险\同事\pdmmaker>cd bin/com/sinosoft/test/

        D:\大家保险\同事\pdmmaker\bin\com\sinosoft\test>javap
        用法: javap <options> <classes>
其中, 可能的选项包括:
        -help  --help  -?        输出此用法消息
        -version                 版本信息
        -v  -verbose             输出附加信息
        -l                       输出行号和本地变量表
        -public                  仅显示公共类和成员
        -protected               显示受保护的/公共类和成员
        -package                 显示程序包/受保护的/公共类
        和成员 (默认)
        -p  -private             显示所有类和成员
        -c                       对代码进行反汇编
        -s                       输出内部类型签名
        -sysinfo                 显示正在处理的类的
        系统信息 (路径, 大小, 日期, MD5 散列)
        -constants               显示最终常量
        -classpath <path>        指定查找用户类文件的位置
        -cp <path>               指定查找用户类文件的位置
        -bootclasspath <path>    覆盖引导类文件的位置

        D:\大家保险\同事\pdmmaker\bin\com\sinosoft\test>javap -v
        错误: 未指定类

        D:\大家保险\同事\pdmmaker\bin\com\sinosoft\test>javap -v -p SingletonTest$1.class
Classfile /D:/大家保险/同事/李红英/pdmmaker/bin/com/sinosoft/test/SingletonTest$1.class
Last modified 2020-8-26; size 1076 bytes
        MD5 checksum 2748df6156ebaa89d32330fa3c46ae41
        Compiled from "SingletonTest.java"
final class com.sinosoft.test.SingletonTest$1 implements java.lang.Runnable
        minor version: 0
        major version: 52
        flags: ACC_FINAL, ACC_SUPER
        Constant pool:
        #1 = Methodref          #12.#30        // java/lang/Object."<init>":()V
        #2 = Methodref          #31.#32        // com/sinosoft/test/LazySingleton.getInstance:()Lcom/sinosoft/test/LazySingleton;
        #3 = Fieldref           #33.#34        // java/lang/System.out:Ljava/io/PrintStream;
        #4 = Class              #35            // java/lang/StringBuilder
        #5 = Methodref          #4.#30         // java/lang/StringBuilder."<init>":()V
        #6 = String             #36            // ============
        #7 = Methodref          #4.#37         // java/lang/StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
        #8 = Methodref          #4.#38         // java/lang/StringBuilder.append:(Ljava/lang/Object;)Ljava/lang/StringBuilder;
        #9 = Methodref          #4.#39         // java/lang/StringBuilder.toString:()Ljava/lang/String;
        #10 = Methodref          #40.#41        // java/io/PrintStream.println:(Ljava/lang/String;)V
        #11 = Class              #42            // com/sinosoft/test/SingletonTest$1
        #12 = Class              #43            // java/lang/Object
        #13 = Class              #44            // java/lang/Runnable
        #14 = Utf8               <init>
  #15 = Utf8               ()V
          #16 = Utf8               Code
          #17 = Utf8               LineNumberTable
          #18 = Utf8               LocalVariableTable
          #19 = Utf8               this
          #20 = Utf8               InnerClasses
          #21 = Utf8               Lcom/sinosoft/test/SingletonTest$1;
          #22 = Utf8               run
          #23 = Utf8               lazySingleton
          #24 = Utf8               Lcom/sinosoft/test/LazySingleton;
          #25 = Utf8               SourceFile
          #26 = Utf8               SingletonTest.java
          #27 = Utf8               EnclosingMethod
          #28 = Class              #45            // com/sinosoft/test/SingletonTest
          #29 = NameAndType        #46:#47        // main:([Ljava/lang/String;)V
          #30 = NameAndType        #14:#15        // "<init>":()V
          #31 = Class              #48            // com/sinosoft/test/LazySingleton
          #32 = NameAndType        #49:#50        // getInstance:()Lcom/sinosoft/test/LazySingleton;
          #33 = Class              #51            // java/lang/System
          #34 = NameAndType        #52:#53        // out:Ljava/io/PrintStream;
          #35 = Utf8               java/lang/StringBuilder
          #36 = Utf8               ============
          #37 = NameAndType        #54:#55        // append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
          #38 = NameAndType        #54:#56        // append:(Ljava/lang/Object;)Ljava/lang/StringBuilder;
          #39 = NameAndType        #57:#58        // toString:()Ljava/lang/String;
          #40 = Class              #59            // java/io/PrintStream
          #41 = NameAndType        #60:#61        // println:(Ljava/lang/String;)V
          #42 = Utf8               com/sinosoft/test/SingletonTest$1
          #43 = Utf8               java/lang/Object
          #44 = Utf8               java/lang/Runnable
          #45 = Utf8               com/sinosoft/test/SingletonTest
          #46 = Utf8               main
          #47 = Utf8               ([Ljava/lang/String;)V
          #48 = Utf8               com/sinosoft/test/LazySingleton
          #49 = Utf8               getInstance
          #50 = Utf8               ()Lcom/sinosoft/test/LazySingleton;
          #51 = Utf8               java/lang/System
          #52 = Utf8               out
          #53 = Utf8               Ljava/io/PrintStream;
          #54 = Utf8               append
          #55 = Utf8               (Ljava/lang/String;)Ljava/lang/StringBuilder;
          #56 = Utf8               (Ljava/lang/Object;)Ljava/lang/StringBuilder;
          #57 = Utf8               toString
          #58 = Utf8               ()Ljava/lang/String;
          #59 = Utf8               java/io/PrintStream
          #60 = Utf8               println
          #61 = Utf8               (Ljava/lang/String;)V
          {
          com.sinosoft.test.SingletonTest$1();
          descriptor: ()V
          flags:
          Code:
          stack=1, locals=1, args_size=1
          0: aload_0
          1: invokespecial #1                  // Method java/lang/Object."<init>":()V
          4: return
          LineNumberTable:
          line 17: 0
          LocalVariableTable:
          Start  Length  Slot  Name   Signature
          0       5     0  this   Lcom/sinosoft/test/SingletonTest$1;

public void run();
        descriptor: ()V
        flags: ACC_PUBLIC
        Code:
        stack=3, locals=2, args_size=1
        0: invokestatic  #2                  // Method com/sinosoft/test/LazySingleton.getInstance:()Lcom/sinosoft/test/LazySingleton;
        3: astore_1
        4: getstatic     #3                  // Field java/lang/System.out:Ljava/io/PrintStream;
        7: new           #4                  // class java/lang/StringBuilder
        10: dup
        11: invokespecial #5                  // Method java/lang/StringBuilder."<init>":()V
        14: ldc           #6                  // String ============
        16: invokevirtual #7                  // Method java/lang/StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
        19: aload_1
        20: invokevirtual #8                  // Method java/lang/StringBuilder.append:(Ljava/lang/Object;)Ljava/lang/StringBuilder;
        23: invokevirtual #9                  // Method java/lang/StringBuilder.toString:()Ljava/lang/String;
        26: invokevirtual #10                 // Method java/io/PrintStream.println:(Ljava/lang/String;)V
        29: return
        LineNumberTable:
        line 20: 0
        line 22: 4
        line 23: 29
        LocalVariableTable:
        Start  Length  Slot  Name   Signature
        0      30     0  this   Lcom/sinosoft/test/SingletonTest$1;
        4      26     1 lazySingleton   Lcom/sinosoft/test/LazySingleton;
        }
        SourceFile: "SingletonTest.java"
        EnclosingMethod: #28.#29                // com.sinosoft.test.SingletonTest.main
        InnerClasses:
static #11; //class com/sinosoft/test/SingletonTest$1