Here you can find the source of toString(long milliseconds)
public static String toString(long milliseconds)
//package com.java2s; /* JFocusBoost is an open-source clone of Focus Booster * Copyright (C) 2012 V?ctor Orozco//w w w .j ava 2 s . c o m * * 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/>. */ import java.util.concurrent.TimeUnit; public class Main { public static String toString(long milliseconds) { return String.format("%02d:%02d", TimeUnit.MILLISECONDS.toMinutes(milliseconds), TimeUnit.MILLISECONDS.toSeconds(milliseconds) - TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(milliseconds))); } }