milliseconds_to_seconds_formatted.java

long startTime = System.nanoTime();
method();
long stopTime = System.nanoTime();
long millis = stopTime - startTime;

public String getDurationFormattedString(long startTime, long stopTime) {
		final long nanosDifference = stopTime - startTime;
		return String.format("%02d min, %02d sec %02d millis",
				TimeUnit.NANOSECONDS.toMinutes(nanosDifference),
				TimeUnit.NANOSECONDS.toSeconds(nanosDifference) -
						TimeUnit.MINUTES.toSeconds(TimeUnit.NANOSECONDS.toMinutes(nanosDifference)),
				TimeUnit.NANOSECONDS.toMillis(nanosDifference)
		);
		System.out.println(getDurationFormattedString(startTime, stopTime));