This program is based on Thread. guess the output

 public class Myself extends Thread
{
        @Override
 public void run()
 {
  for(int i=1;i=5;i++){
  
           System.out.print(i);
           System.out.print(i);
     }
 }  	
 public static void main(String args[])
 {
  Myself T1=new Myself();
  Myself T2=new Myself();
  T1.start();
  T2.start();
 }  
}