Here you can find the source of AddDays(long initialDateMilliSeconds, int dayNumber)
public static long AddDays(long initialDateMilliSeconds, int dayNumber)
//package com.java2s; /*// w w w. ja v a 2 s.c om Copyright 2005-2015, Olivier PETRUCCI. This file is part of Areca. Areca 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 2 of the License, or (at your option) any later version. Areca 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 Areca; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ public class Main { public static long AddDays(long initialDateMilliSeconds, int dayNumber) { return initialDateMilliSeconds + dayNumber * 24 * 3600 * 1000; } }