Here you can find the source of getDefaultTimeZoneString()
public static String getDefaultTimeZoneString()
//package com.java2s; /*/* ww w . j av a2 s . c o m*/ * JBoss, Home of Professional Open Source. * See the COPYRIGHT.txt file distributed with this work for information * regarding copyright ownership. Some portions may be licensed * to Red Hat, Inc. under one or more contributor license agreements. * * 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 String timeZone; public static String getDefaultTimeZoneString() { if (timeZone == null) { String s = new SimpleDateFormat("Z").format(new Date(0)); //$NON-NLS-1$ timeZone = s.substring(0, 3) + ':' + s.substring(3, 5); } return timeZone; } }