Here you can find the source of formatTimeMillis(long millis)
public static String formatTimeMillis(long millis)
//package com.java2s; /*// w ww . j av a 2s . c om * Copyright 2013 SmartBear Software * * Licensed under the EUPL, Version 1.1 or - as soon they will be approved by the European Commission - subsequent * versions of the EUPL (the "Licence"); * You may not use this work except in compliance with the Licence. * You may obtain a copy of the Licence at: * * http://ec.europa.eu/idabc/eupl * * Unless required by applicable law or agreed to in writing, software distributed under the Licence is * distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either * express or implied. See the Licence for the specific language governing permissions and limitations * under the Licence. */ public class Main { public static String formatTimeMillis(long millis) { long seconds = millis / 1000; return String.format("%s.%03d", formatTime(seconds), millis % 1000); } public static String formatTime(long seconds) { long hours = seconds / 3600; seconds %= 3600; long minutes = seconds / 60; seconds %= 60; return String.format("%02d:%02d:%02d", hours, minutes, seconds); } }