Source code: maddany/TimerThread.java

   package maddany;
   
   public class TimerThread extends Thread {
       private Wakable target;
       private int delay;
   
       public TimerThread(Wakable target, int ttw) {
           super();
           this.target = target;
          delay = ttw;
      }
  
      public void run() {
          try {
              while(true) {
                  super.sleep(delay);
                  target.wakeUp();
              }
          } catch(InterruptedException e) {
              e.printStackTrace();
          }
      }
  }