Java UTC TimeZone formatTimezoneOffsetFromUTC(TimeZone tz)

Description

format Timezone Offset From UTC

License

LGPL

Declaration

public static String formatTimezoneOffsetFromUTC(TimeZone tz) 

Method Source Code

//package com.java2s;
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1/*  w  w w . ja va  2 s.  c  om*/
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (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.mozilla.org/MPL/
 *
 * 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 part of dcm4che, an implementation of DICOM(TM) in
 * Java(TM), hosted at https://github.com/gunterze/dcm4che.
 *
 * The Initial Developer of the Original Code is
 * Agfa Healthcare.
 * Portions created by the Initial Developer are Copyright (C) 2011
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 * See @authors listed below
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

import java.util.TimeZone;

public class Main {
    public static String formatTimezoneOffsetFromUTC(TimeZone tz) {
        return appendZZZZZ(tz.getRawOffset(), new StringBuilder(5)).toString();
    }

    private static StringBuilder appendZZZZZ(int offset, StringBuilder sb) {
        if (offset < 0) {
            offset = -offset;
            sb.append('-');
        } else
            sb.append('+');
        int min = offset / 60000;
        appendXX(min / 60, sb);
        appendXX(min % 60, sb);
        return sb;
    }

    private static void appendXX(int i, StringBuilder toAppendTo) {
        if (i < 10)
            toAppendTo.append('0');
        toAppendTo.append(i);
    }
}

Related

1. _getUTCOffset()
2. getUTCTimeZone()
3. getUTCTimeZone()
4. localToUTC(long local)
5. utc()