Java tutorial
//package com.java2s; /** * Persian Calendar see: http://code.google.com/p/persian-calendar/ Copyright (C) 2012 Mortezaadi@gmail.com PersianCalendarUtils.java Persian Calendar 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 { /** * Ceil function in original algorithm * * @param double1 * @param double2 * @return long */ public static long ceil(double double1, double double2) { return (long) (double1 - double2 * Math.floor(double1 / double2)); } }