Here you can find the source of getTimeZoneOffset(long t)
protected static int getTimeZoneOffset(long t)
//package com.java2s; /*// w ww.j a v a 2 s . co m The contents of this file are subject to the Common Public Attribution License Version 1.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.projectlibre.com/license . The License is based on the Mozilla Public License Version 1.1 but Sections 14 and 15 have been added to cover use of software over a computer network and provide for limited attribution for the Original Developer. In addition, Exhibit A has been modified to be consistent with Exhibit B. Software distributed under the License is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for the specific language governing rights and limitations under the License. The Original Code is OpenProj and ProjectLibre. The Original Developer is the Initial Developer and is both Projity, Inc and ProjectLibre Inc. All portions of the code written by Projity are Copyright (c) 2006, 2008. All Rights Reserved. All portions of the code written by ProjectLibre are Copyright (c) 2012. All Rights Reserved. Contributors Projity, Inc. and ProjectLibre, Inc. Alternatively, the contents of this file may be used under the terms of the ProjectLibre End-User License Agreement (the ProjectLibre License) in which case the provisions of the ProjectLibre License are applicable instead of those above. If you wish to allow use of your version of this file only under the terms of the ProjectLibre License and not to allow others to use your version of this file under the CPAL, indicate your decision by deleting the provisions above and replace them with the notice and other provisions required by the Project Libre License. If you do not delete the provisions above, a recipient may use your version of this file under either the CPAL or the ProjectLibre Licenses. [NOTE: The text of this Exhibit A may differ slightly from the text of the notices in the Source Code files of the Original Code. You should use the text of this Exhibit A rather than the text found in the Original Code Source Code for Your Modifications.] EXHIBIT B. Attribution Information both ProjectLibre and OpenProj required Attribution Copyright Notice: Copyright (c) 2012, ProjectLibre, Inc. Attribution Phrase (not exceeding 10 words): ProjectLibre, the updated version of OpenProj Attribution URL: http://www.projectlibre.com Graphic Image as provided in the Covered Code as file: projectlibre-logo.png with alternatives listed on http://www.projectlibre.com/logo Display of Attribution Information is required in Larger Works which are defined in the CPAL as a work which combines Covered Code or portions thereof with code not governed by the terms of the CPAL. However, in addition to the other notice obligations, all copies of the Covered Code in Executable and Source Code form distributed must, as a form of attribution of the original author, include on each user interface screen the "OpenProj" and "ProjectLibre" logos visible to all users. The OpenProj logo should be located horizontally aligned with the menu bar and left justified on the top left of the screen adjacent to the File menu. The logo must be at least 100 x 25 pixels. When users click on the "OpenProj" logo it must direct them back to http://www.projity.com. The ProjectLibre logo should be located horizontally aligned immediately above the OpenProj logo and left justified in alignment with the OpenProj logo. The logo must be at least 144 x 31 pixels. When users click on the "ProjectLibre" logo it must direct them back to http://www.projectlibre.com. Attribution Copyright Notice: Copyright (c) 2006, 2008 Projity, Inc. Attribution Phrase (not exceeding 10 words): Powered by OpenProj, an open source solution from Projity Attribution URL: http://www.projity.com Graphic Image as provided in the Covered Code as file: openproj_logo.png with alternatives listed on http://www.projity.com/logo Display of Attribution Information is required in Larger Works which are defined in the CPAL as a work which combines Covered Code or portions thereof with code not governed by the terms of the CPAL. However, in addition to the other notice obligations, all copies of the Covered Code in Executable and Source Code form distributed must, as a form of attribution of the original author, include on each user interface screen the "OpenProj" and "ProjectLibre" logos visible to all users. The OpenProj logo should be located horizontally aligned with the menu bar and left justified on the top left of the screen adjacent to the File menu. The logo must be at least 100 x 25 pixels. When users click on the "OpenProj" logo it must direct them back to http://www.projity.com. */ import java.util.Calendar; public class Main { protected static Calendar localCalendar; protected static int getTimeZoneOffset(long t) { Calendar c = getLocalCalendar(); c.setTimeInMillis(t); return c.get(Calendar.ZONE_OFFSET) + c.get(Calendar.DST_OFFSET); } protected static Calendar getLocalCalendar() { if (localCalendar == null) localCalendar = Calendar.getInstance(); return localCalendar; } }