Here you can find the source of formatDateString(Date d)
protected static String formatDateString(Date d)
//package com.java2s; /**/*from w ww .j av a 2s .c o m*/ * Copyright (c) 2009--2014 Red Hat, Inc. * * This software is licensed to you under the GNU General Public License, * version 2 (GPLv2). There is NO WARRANTY for this software, express or * implied, including the implied warranties of MERCHANTABILITY or FITNESS * FOR A PARTICULAR PURPOSE. You should have received a copy of GPLv2 * along with this software; if not, see * http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt. * * Red Hat trademarks are not licensed under GPLv2. No permission is * granted to use or replicate Red Hat trademarks that are incorporated * in this software or its documentation. */ import java.util.Date; import java.util.TimeZone; public class Main { protected static String formatDateString(Date d) { String dateFormat = "yyyyMMddHHmm"; java.text.SimpleDateFormat sdf = new java.text.SimpleDateFormat(dateFormat); // Lucene uses GMT for indexing sdf.setTimeZone(TimeZone.getTimeZone("GMT")); return sdf.format(d); } }