Java ZoneId getDefaultZoneId()

Description

get Default Zone Id

License

Apache License

Declaration

public static ZoneId getDefaultZoneId() 

Method Source Code

//package com.java2s;
/*//from www .  j a v a  2  s  . co  m
 *  Copyright 2010, 2011 Christopher Pheby
 *
 *  Licensed 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.
 */

import java.time.ZoneId;

public class Main {
    public static ZoneId getDefaultZoneId() {

        ZoneId zone = null;
        try {
            try {
                String id = System.getProperty("user.timezone");
                if (id != null) {
                    zone = ZoneId.of(id);
                }
            } catch (RuntimeException ex) {
                zone = null;
            }
            if (zone == null) {
                zone = ZoneId.of(java.util.TimeZone.getDefault().getID());
            }
        } catch (RuntimeException ex) {
            zone = null;
        }
        if (zone == null) {
            zone = ZoneId.of("Z");
        }
        return zone;
    }
}

Related

1. determineTimeZoneId(String zoneId)
2. fromEpochMilliseconds(final Long fromEpoch)
3. getDefaultTimeZone()
4. getDefaultZoneId()
5. getRequestTimeZone(String timestamp)
6. getTimezone(String tzid)
7. getTimeZoneId(final TimeZone tz)
8. getZoneDateTime(Date d, String tzId)