Here you can find the source of secondOfDate(Date d1, Date d2)
public static long secondOfDate(Date d1, Date d2)
//package com.java2s; /*// ww w .j av a2 s . com * DateUtils.java * * 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 2 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 Library General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * * Author: Winter Lau (javayou@gmail.com) * http://dlog4j.sourceforge.net */ import java.text.SimpleDateFormat; import java.util.Date; public class Main { public static long secondOfDate(Date d1, Date d2) { SimpleDateFormat fDate = new java.text.SimpleDateFormat("yyyyMMddHHmmss"); long l_d1 = Long.valueOf(fDate.format(d1)); long l_d2 = Long.valueOf(fDate.format(d2)); // System.out.println("l_d1="+l_d1+" l_d2="+l_d2); return l_d1 - l_d2; } public static String format(String format, Date d) { if (d == null) { return ""; } return new java.text.SimpleDateFormat(format).format(d); } }