Here you can find the source of formatTimestamp(Date timestamp)
public static String formatTimestamp(Date timestamp)
//package com.java2s; /**//from w w w . ja va 2 s .c om * Copyright (c) 2014 Inera AB, <http://inera.se/> * * This file is part of SKLTP. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ import java.text.SimpleDateFormat; import java.util.Date; public class Main { private static ThreadLocal<SimpleDateFormat> yyyyMMddFormatter = new ThreadLocal<SimpleDateFormat>() { @Override public SimpleDateFormat initialValue() { return new SimpleDateFormat("yyyyMMdd"); } }; public static String formatTimestamp(Date timestamp) { return yyyyMMddFormatter.get().format(timestamp); } }