javap反编译

原Java文件如：

public class Hello{
public static void main(String args[])
{
   int a=0;
   a+=1;
  
}
}

用javac将其编译，然后使用javap -c -v Hello反编译得到如下结果：

Compiled from "Hello.java"
public class Hello extends java.lang.Object
SourceFile: "Hello.java"
minor version: 0
major version: 50
Constant pool:
const #1 = Method       #3.#12; // java/lang/Object."<init>":()V
const #2 = class        #13;    // Hello
const #3 = class        #14;    // java/lang/Object
const #4 = Asciz        <init>;
const #5 = Asciz        ()V;
const #6 = Asciz        Code;
const #7 = Asciz        LineNumberTable;
const #8 = Asciz        main;
const #9 = Asciz        ([Ljava/lang/String;)V;
const #10 = Asciz       SourceFile;
const #11 = Asciz       Hello.java;
const #12 = NameAndType #4:#5;// "<init>":()V
const #13 = Asciz       Hello;
const #14 = Asciz       java/lang/Object;

{
public Hello();
Code:
   Stack=1, Locals=1, Args_size=1
   0:   aload_0
   1:   invokespecial   #1; //Method java/lang/Object."<init>":()V
   4:   return
LineNumberTable:
   line 1: 0

public static void main(java.lang.String[]);
Code:
   Stack=1, Locals=2, Args_size=1
   0:   iconst_0
   1:   istore_1
   2:   iinc    1, 1
   5:   return
LineNumberTable:
   line 4: 0
   line 5: 2
   line 7: 5

}