Thread completion in java pgm

Thread completion

public class Main

{

 public static void main(String[] argv) throws Exception

{

      Thread thread = new MyThread();

      thread.start();

      if (thread.isAlive())

      {

         System.out.println("Thread has not finished");

      }

      else

     {

         System.out.println("Finished");

      }

      long delayMillis = 5000;

      thread.join(delayMillis);

      if (thread.isAlive())

     {

         System.out.println("thread has not finished");

      }

      else

     {

         System.out.println("Finished");

      }

      thread.join();

   }

}

class MyThread extends Thread

 {

   boolean stop = false;

   public void run()

  {

      while (true)

      {

         if (stop)

        {

            return;

         }

      }

   }

}