public class ThreadOne extends Thread {
   private boolean alive;
   public ThreadOne() {
      alive = true;
      start();
   }
   public void kill(){
      alive = false;
   }
   public void run() {
      while(alive){
	 System.out.println("Thread 1");
	 try { sleep(1000); } catch(InterruptedException ie) {}
      }
   }
}