/*
 * Example of implementing threads by extending the Thread class
 */

public class Sleepy extends Thread
{
   protected String name;
   protected boolean interrupted;

   public Sleepy(String name)
   {
      this.name = name;
      interrupted = false;
   }

   /*
    * Override run() method of Thread class
    */
   @Override
   public void run()
   {
      while (!interrupted)
      {
         System.out.println(name + ": Sleeping");
         try
         { 
            Thread.sleep(1000);
         }
         catch(InterruptedException e)
         {
            interrupted = true;
            System.out.println(name + ": interrupted");
         } 
         System.out.println(name + ": Awake");
      } 
   }

   /*
    * Terminates the thread
    */
   public void terminate()
   {  
      interrupt();
      interrupted = true;
      // wait for the thread to terminate
      while (isAlive())
      {
         try
         {
            Thread.sleep(10);
         }
         catch (InterruptedException e)
         {}
      }
      System.out.println(name + ": stopped");
   }
}