MyClass.java

// Demonstrates javap -c retaining identifier names.
//
// Do:
// javac MyClass.java
// javap -c MyClass

public class MyClass {
	
    // Use a value that the compiler cannot predict,
    // to eliminate the possibility of the variable
    // being optimized away.
    public long aNumber = System.currentTimeMillis();
	
    void myFunc() {
        System.out.println(aNumber * 2 + 1);
    }
	
    public static void main(String [] args) {
        new MyClass().myFunc();
    }
}

/*
Here is the output of javap -c MyClass:

>javap -c MyClass
Compiled from "MyClass.java"
public class MyClass extends java.lang.Object{
public long aNumber;

public MyClass();
  Code:
   0:	aload_0
   1:	invokespecial	#1; //Method java/lang/Object."<init>":()V
   4:	aload_0
   5:	invokestatic	#2; //Method java/lang/System.currentTimeMillis:()J
   8:	putfield	#3; //Field aNumber:J
   11:	return

void myFunc();
  Code:
   0:	getstatic	#4; //Field java/lang/System.out:Ljava/io/PrintStream;
   3:	aload_0
   4:	getfield	#3; //Field aNumber:J
   7:	ldc2_w	#5; //long 2l
   10:	lmul
   11:	lconst_1
   12:	ladd
   13:	invokevirtual	#7; //Method java/io/PrintStream.println:(J)V
   16:	return

public static void main(java.lang.String[]);
  Code:
   0:	new	#8; //class MyClass
   3:	dup
   4:	invokespecial	#9; //Method "<init>":()V
   7:	invokevirtual	#10; //Method myFunc:()V
   10:	return

}
*/