Here you can find the source of plusHour(int hour)
public static Date plusHour(int hour)
//package com.java2s; /**// w w w .j av a2s . c om * Copyright (C) 2012 Cardinal Info.Tech.Co.,Ltd. * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License, version 3, * as published by the Free Software Foundation. * * 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 Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Date; public class Main { public static Date plusHour(int hour) { Calendar cal = Calendar.getInstance(); cal.add(Calendar.HOUR, hour); return cal.getTime(); } public static Date plusHour(Date date, int hour) { Calendar cal = Calendar.getInstance(); cal.setTime(date); cal.add(Calendar.HOUR, hour); return cal.getTime(); } public static String getTime() { Date d = new Date(); SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); return sdf.format(d); } }