How to calculate the difference between two Java java.sql.Timestamps?

Question

Please include the nanos, otherwise it would be trivial:

long diff = Math.abs(t1.getTime () - t2.getTime ());

[EDIT] I want the most precis

Answer 1

I use this method to get difference between 2 java.sql.Timestmap

/**
 * Get a diff between two timestamps.
 *
 * @param oldTs The older timestamp
 * @param newTs The newer timestamp
 * @param timeUnit The unit in which you want the diff
 * @return The diff value, in the provided time unit.
 */
public static long getDateDiff(Timestamp oldTs, Timestamp newTs, TimeUnit timeUnit) {
    long diffInMS = newTs.getTime() - oldTs.getTime();
    return timeUnit.convert(diffInMS, TimeUnit.MILLISECONDS);
}

// Examples:
// long diffMinutes = getDateDiff(oldTs, newTs, TimeUnit.MINUTES);
// long diffHours = getDateDiff(oldTs, newTs, TimeUnit.HOURS);