Here you can find the source of formatMillis(long millis)
public static String formatMillis(long millis)
//package com.java2s; /*//ww w .j a v a 2 s.co m * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License") + you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. */ import java.util.concurrent.TimeUnit; public class Main { public static String formatMillis(long millis) { long m = millis; long hours = TimeUnit.MILLISECONDS.toHours(m); m -= TimeUnit.HOURS.toMillis(hours); long minutes = TimeUnit.MILLISECONDS.toMinutes(m); m -= TimeUnit.MINUTES.toMillis(minutes); long seconds = TimeUnit.MILLISECONDS.toSeconds(m); m -= TimeUnit.SECONDS.toMillis(seconds); return String.format("%02d:%02d:%02d.%03d", hours, minutes, seconds, m); } }