使用JDK的javap工具，反汇编由javac编译器生成的.class文件

用javap -c Test > Test.bc

test.java


public class test {

	public static int a ;
	
	public static void main(String[] args) {
		System.out.println(++a);       

	}

}





Compiled from "test.java"
public class test extends java.lang.Object{
public static int a;

public test();
  Code:
   0:	aload_0
   1:	invokespecial	#10; //Method java/lang/Object."<init>":()V
   4:	return

public static void main(java.lang.String[]);
  Code:
   0:	getstatic	#18; //Field java/lang/System.out:Ljava/io/PrintStream;
   3:	getstatic	#24; //Field a:I
   6:	iconst_1
   7:	iadd
   8:	dup
   9:	putstatic	#24; //Field a:I
   12:	invokevirtual	#26; //Method java/io/PrintStream.println:(I)V
   15:	return

}