Thread.currentThread().sleep(arg1);
Thread.sleep(arg1);
  public void run()  //- overrides Thread  {                isReady = true;                while (isReady) {    try {      Thread.currentThread().sleep(arg1);    }    catch (InterruptedException e) {                        System.out.println(" GC thread returning");                        isFinished = true;    }                        if (isFinished) return;    System.gc();    }  }