Thread program: Strange output

Question

Hi,
I have written a simple thread program. Previously I was trying to print hello world in the run method, the I changed it to print the value of a static data member, but strangely its still printing hello World. However if I change the print statement in the main method, it is reflected in the output but the changes to the print statement are not. Its always hello World output. I have changed the name of file, recompile it, close the shell window, restarted the computer but always the output is hello world. Can somebody help me with that. My objetive is to prove that data segment is shred in threads.
public class Share2 extends Thread{
static int Data=10;
   public void run ( ) {
    Data=Data+10;
     System.out.println("Data="+Data);
  public static void main (String[ ] args ) {
    First obj=new First ( );
    obj.start ( );
    System.out.println("Data ^^^^in!!! 9999main****="+Data);
}D:\javaprogs\misc\threads>javac Share2.java
D:\javaprogs\misc\threads>java Share2
Data ^^^^in!!! 9999main****=10
Hello World
D:\javaprogs\misc\threads>javac Share2.java
D:\javaprogs\misc\threads>java Share2
Data ^^^^in!!! 9999main****=10
Hello World
D:\javaprogs\misc\threads>
Zulfi.

Answer 1

public class Share2 extends Thread{
static int Data=10;
public void run ( ) {
Data=Data+10;
System.out.println("Data="+Data);
public static void main (String[ ] args ) {
First obj=new First ( );<<<<< what is First? >>>>>>
obj.start ( );
System.out.println("Data ^^^^in!!!
n!!! 9999main****="+Data);
D:\javaprogs\misc\threads>javac Share2.java
D:\javaprogs\misc\threads>java Share2
Data ^^^^in!!! 9999main****=10
Hello World
D:\javaprogs\misc\threads>javac Share2.java
D:\javaprogs\misc\threads>java Share2
Data ^^^^in!!! 9999main****=10
Hello World
D:\javaprogs\misc\threads>
Zulfi.