code: public long getElapsedMilliseconds() {
  		long elapsed;
  		if (running) {
  			elapsed = (System.nanoTime() - startTime);
  		} else {
  			elapsed = (stopTime - startTime);
  		}
  		return elapsed / nsPerMs;
  	}
docs: Gets the total elapsed time measured by the current instance, in
  milliseconds. 10000 Ticks = 1 millisecond (1000000 nanoseconds)