Java tutorial
//package com.java2s; /* * Copyright (C) Stichting Akvo (Akvo Foundation) * * This file is part of Akvo Caddisfly. * * Akvo Caddisfly 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. * * Akvo Caddisfly 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 Akvo Caddisfly. If not, see <http://www.gnu.org/licenses/>. */ import java.util.Calendar; public class Main { /** * Gets the number of hours in between two given dates * * @param calendar1 the first date * @param calendar2 the second date * @return the number hours */ public static int getHoursDifference(Calendar calendar1, Calendar calendar2) { if (calendar1 == null || calendar2 == null) { return 0; } return (int) ((calendar2.getTimeInMillis() - calendar1.getTimeInMillis()) / (1000 * 60 * 60)); } }