Here you can find the source of getTimeZoneIds()
public static String[] getTimeZoneIds()
//package com.java2s; /*//from w w w .j ava 2 s. c o m This file is part of RouteConverter. RouteConverter 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. RouteConverter 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 General Public License for more details. You should have received a copy of the GNU General Public License along with RouteConverter; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA Copyright (C) 2007 Christian Pesch. All Rights Reserved. */ import java.util.TimeZone; import static java.util.Arrays.sort; public class Main { public static String[] getTimeZoneIds() { String[] ids = TimeZone.getAvailableIDs(); sort(ids); return ids; } }