Here you can find the source of getHttpDate()
public static String getHttpDate()
//package com.java2s; /*//from www . ja va 2 s. c om ** Rachel - Resource Loading Toolkit for Web Start/JNLP ** Copyright (c) 2001, 2002 by Gerald Bauer ** ** This program is free software. ** ** You may redistribute it and/or modify it under the terms of the GNU ** General Public License as published by the Free Software Foundation. ** Version 2 of the license should be included with this distribution in ** the file LICENSE, as well as License.html. If the license is not ** included with this distribution, you may find a copy at the FSF web ** site at 'www.gnu.org' or 'www.fsf.org', or you may write to the ** Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139 USA. ** ** THIS SOFTWARE IS PROVIDED AS-IS WITHOUT WARRANTY OF ANY KIND, ** NOT EVEN THE IMPLIED WARRANTY OF MERCHANTABILITY. THE AUTHOR ** OF THIS SOFTWARE, ASSUMES _NO_ RESPONSIBILITY FOR ANY ** CONSEQUENCE RESULTING FROM THE USE, MODIFICATION, OR ** REDISTRIBUTION OF THIS SOFTWARE. ** */ import java.text.SimpleDateFormat; import java.util.Date; public class Main { /** * RFC 1123 date format example: Mon, 06 May 1996 04:57:00 GMT - days: Mon, * Tue, Wed, Thu, Fri, Sat, Sun - months: Jan, Feb, Mar, Apr, May, Jun, Jul, * Aug, Sep, Oct, Nov, Dec */ private static SimpleDateFormat _df; /** * convienence method returns current timestamp */ public static String getHttpDate() { return getHttpDate(new Date()); } public static String getHttpDate(long timestamp) { return getHttpDate(new Date(timestamp)); } public static String getHttpDate(Date date) { return _df.format(date); } }