Java Timer Util

Timer.java

public class Timer {
		private long startTime = System.currentTimeMillis();
		private long lapStartTime = System.currentTimeMillis();
		private List<Long> laps = new ArrayList<>(LAPS_COUNT);
		private long endTime = System.currentTimeMillis();

		public void start() {
			startTime = System.currentTimeMillis();
			lapStartTime = startTime;
		}

		public void lap() {
			long newLap = System.currentTimeMillis();
			laps.add(newLap - lapStartTime);
			lapStartTime = newLap;
		}

		public void stop() {
			endTime = System.currentTimeMillis();
		}

		public void clear() {
			laps.clear();
		}

		public void print() {
			System.out.println(this.toString());
		}

		@Override
		public String toString() {
			StringBuilder sb = new StringBuilder();
			sb.append("StartTime: ").append(this.startTime);
			sb.appendCodePoint('\n');
			sb.append("EndTime: ").append(this.endTime);
			sb.appendCodePoint('\n');
			sb.append("Duration: ").append(this.endTime - this.startTime);
			sb.appendCodePoint('\n');
			sb.append("Laps: ").append(this.laps.size());
			sb.append("\n\tmax: ").append(laps.stream().max((a,b) -> a.compareTo(b)).orElse(0L));
			sb.append("\n\tmin: ").append(laps.stream().min((a,b) -> a.compareTo(b)).orElse(0L));
			double avg = laps.stream().map(longNum -> (double)longNum).collect(Collectors.reducing((a, b) -> a + b)).orElse(1.0) / laps.size();
			sb.append("\n\tavg: ").append(avg);
			sb.append("\n\tsteps/sec ").append(1000.0/avg);
//			sb.append("\n\t").append(Joiner.on(", ").join(laps));
			return sb.toString();
		}
	}