javap 反編譯器

Using javap

// -- Main.java --
public class Main{
  public static void main(String[] args){
    System.out.println("Hello World");
  } 
}
$ javac Main.java
$ javap -c Main
Compiled from "Main.java"
public class Main extends java.lang.Object{
public Main();
  Code:
   0:   aload_0
   1:   invokespecial   #1; //Method java/lang/Object."":()V
   4:   return

public static void main(java.lang.String[]);
  Code:
   0:   getstatic       #2; //Field java/lang/System.out:Ljava/io/PrintStream;
   3:   ldc     #3; //String Hello World
   5:   invokevirtual   #4; //Method java/io/PrintStream.println:(Ljava/lang/String;)V
   8:   return

}