javap反编译字节码文件

 

javap -v main.class

{
    public static void main(String[] args) {
     int a=10;
     int b=10;
     int c=a+b;
     return;
    }
}

Classfile /F:/myCode/java/jvm/0710_demo01/untitled/target/classes/org/example/main.class
  Last modified 2023年7月10日; size 447 bytes
  MD5 checksum 675a0d673d66326ba82ea00f9de64972
  Compiled from "Main.java"
public class org.example.Main
  minor version: 0
  major version: 55
  flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: #2                          // org/example/Main
  super_class: #3                         // java/lang/Object
  interfaces: 0, fields: 0, methods: 2, attributes: 1
Constant pool:
   #1 = Methodref          #3.#21         // java/lang/Object."<init>":()V
   #2 = Class              #22            // org/example/Main
   #3 = Class              #23            // java/lang/Object
   #4 = Utf8               <init>
   #5 = Utf8               ()V
   #6 = Utf8               Code
   #7 = Utf8               LineNumberTable
   #8 = Utf8               LocalVariableTable
   #9 = Utf8               this
  #10 = Utf8               Lorg/example/Main;
  #11 = Utf8               main
  #12 = Utf8               ([Ljava/lang/String;)V
  #13 = Utf8               args
  #14 = Utf8               [Ljava/lang/String;
  #15 = Utf8               a
  #16 = Utf8               I
  #17 = Utf8               b
  #18 = Utf8               c
  #19 = Utf8               SourceFile
  #20 = Utf8               Main.java
  #21 = NameAndType        #4:#5          // "<init>":()V
  #22 = Utf8               org/example/Main
  #23 = Utf8               java/lang/Object
{
  public org.example.Main();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        line 5: 0
        line 6: 3
        line 7: 6
        line 8: 10
      LocalVariableTable:
        Start  Length  Slot  Name   Signature
            0      11     0  args   [Ljava/lang/String;
            3       8     1     a   I
            6       5     2     b   I
           10       1     3     c   I
}
SourceFile: "Main.java"