Here you can find the source of getCurrentTimezone()
public static TimeZone getCurrentTimezone()
//package com.java2s; /*/*from w w w . ja v a2 s .c om*/ * DateTimeHelper.java * * Copyright (c) 2015 TheRoBrit * * Nucli 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 3 of the License, or * (at your option) any later version. * * Nucli 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 this program. If not, see <http://www.gnu.org/licenses/>. */ import java.util.TimeZone; public class Main { private static final InheritableThreadLocal currentTimezone = new InheritableThreadLocal(); /** * Gets the current timezone of the computer (i.e. GMT, PST, etc.) * * @return The current timezone or if there is none specified the default timezone */ public static TimeZone getCurrentTimezone() { final TimeZone timezone = (TimeZone) currentTimezone.get(); return timezone != null ? timezone : TimeZone.getDefault(); } }