code: public void setRepeatTimerDelay(int delay)
      {
          if (delay <= 0)
          {
              String message = Logging.getMessage("generic.ArgumentOutOfRange", delay);
              Logging.logger().severe(message);
              throw new IllegalArgumentException(message);
          }
          this.repeatTimer.setDelay(delay);
      }
docs: Set the repeat timer delay in milliseconds.
  
  @param delay the repeat timer delay in milliseconds.
  
  @throws IllegalArgumentException