Java tutorial
//package com.java2s; import java.util.concurrent.TimeUnit; public class Main { /** * Builds String output of time in the style of: HH:MM:SS * @param millis * @return */ public static String buildTimerStyleTime(long millis) { return String.format("%02d:%02d:%02d", TimeUnit.MILLISECONDS.toHours(millis), TimeUnit.MILLISECONDS.toMinutes(millis) - TimeUnit.HOURS.toMinutes(TimeUnit.MILLISECONDS.toHours(millis)), TimeUnit.MILLISECONDS.toSeconds(millis) - TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(millis)) ); } }