Here you can find the source of formatMillis(long millis)
public static String formatMillis(long millis)
//package com.java2s; /*//from w w w . ja v a2 s .co m Copyright 2008, 2009, 2010 Peter Hofmann This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ public class Main { public static String formatMillis(long millis) { millis /= 1000; long h = millis / 3600; millis -= 3600 * h; long m = millis / 60; millis -= 60 * m; return "" + (h < 10 ? "0" : "") + h + ":" + (m < 10 ? "0" : "") + m + ":" + (millis < 10 ? "0" : "") + millis; } }