Showing posts with label timezone display name. Show all posts
Showing posts with label timezone display name. Show all posts

Thursday, February 13, 2014

timezone get list, time zone id, time zone name, time offset using java


/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package time.zone;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.Locale;
import java.util.TimeZone;

/**
 *
 * @author Pritom Kumar Mondal
 */
public class TimeZoneList {
    public static void main(String[] args) {
        String supportedPattern = "^(Africa|America|Asia|Atlantic|Australia|"
                + "Europe|Indian|Pacific)/.*";
        String[] timeZoneIdList = TimeZone.getAvailableIDs();
        List<TimeZone> timeZoneList = new ArrayList<TimeZone>();
        for(String id : timeZoneIdList) {
            if(id.matches(supportedPattern)) {
                timeZoneList.add(TimeZone.getTimeZone(id));
            }
        }
        Collections.sort(timeZoneList, new Comparator<TimeZone>() {
            public int compare(final TimeZone a, final TimeZone b) {
                return a.getID().compareTo(b.getID());
            }
        });
        for(TimeZone timeZone : timeZoneList) {
            String zoneId = timeZone.getID();
            String displayName = timeZone.getDisplayName();
            double offset = (double) timeZone.getRawOffset() / 1000 / 60 / 60;
            String minute = ((offset - (int) offset) * 60) > 0 ? (" & " + (int) 
                    ((offset - (int) offset) * 60) + " minute") : "";
            System.out.println("Zone id: " + zoneId + ", name: " + displayName + ""
                    + ", offset: " + (int) offset + " hour" + minute);
        }
    }
}

And output would something like this...

.
.
.
Zone id: Asia/Bangkok, name: Indochina Time, offset: 7 hour
Zone id: Asia/Beirut, name: Eastern European Time, offset: 2 hour
Zone id: Asia/Bishkek, name: Kirgizstan Time, offset: 6 hour
Zone id: Asia/Brunei, name: Brunei Time, offset: 8 hour
Zone id: Asia/Calcutta, name: India Standard Time, offset: 5 hour & 30 minute
Zone id: Asia/Choibalsan, name: Choibalsan Time, offset: 8 hour
Zone id: Asia/Chongqing, name: China Standard Time, offset: 8 hour
Zone id: Asia/Chungking, name: China Standard Time, offset: 8 hour
Zone id: Asia/Colombo, name: India Standard Time, offset: 5 hour & 30 minute
Zone id: Asia/Dacca, name: Bangladesh Time, offset: 6 hour
Zone id: Asia/Damascus, name: Eastern European Time, offset: 2 hour
Zone id: Asia/Dhaka, name: Bangladesh Time, offset: 6 hour
.
.
.