Display 1 to 20 in Reverse Order.

class ReverseThread implements Runnable
 {
Thread t;
int no;
boolean running = true;
ReverseThread(int n)
{
t=new Thread(this);
t.start();
no = n;
}

public void run()
{
 try{
        while(running)
        {
 System.out.println("The reverse thread is executing no = " + no);
 no--;
 if(no == 0)
   running = false;
 t.sleep(200);
}
      }catch(InterruptedException e){e.printStackTrace();}
     
    }

}
class rev
 {
public static void main(String ar[])
  {
ReverseThread t1=new ReverseThread(20);

   }
  }