gets the timezone +/-{****}}, offset from GMT, - Java java.util

Java examples for java.util:Timezone

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Description

gets the timezone +/-{****}}, offset from GMT,

Demo Code

/*//from   w ww.java  2  s . co  m
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing,
 *  software distributed under the License is distributed on an
 *   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 *  KIND, either express or implied.  See the License for the
 *  specific language governing permissions and limitations
 *  under the License.
 */
//package com.java2s;

import java.util.TimeZone;

public class Main {
    public static void main(String[] argv) throws Exception {
        System.out.println(getTimeZone());
    }

    /**
     * gets the timezone +/-{****}}, offset from GMT,
     * @return String time zone (eg, +0530, -0600).
     */
    public static String getTimeZone() {
        try {
            int offset = TimeZone.getDefault().getRawOffset();
            return calculateTimeZoneOffset(offset);
        } catch (Exception e) {
            return "";
        }
    }

    private static String calculateTimeZoneOffset(long offset) {
        StringBuilder tz = new StringBuilder();
        if ((offset < 0)) {
            tz.append("-");
            offset = -offset;
        } else {
            tz.append("+");
        }

        long hourOffset = offset / (1000 * 60 * 60);
        long minuteOffset = (offset / (1000 * 60)) % 60;

        if (hourOffset < 10) {
            tz.append("0");
        }
        tz.append(hourOffset);

        if (minuteOffset < 10) {
            tz.append("0");
        }
        tz.append(minuteOffset);

        return tz.toString();
    }
}

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