Java Date Time - ZoneId getAvailableZoneIds() example

ZoneId getAvailableZoneIds() gets the set of available zone IDs.


getAvailableZoneIds has the following syntax.

public static Set<String> getAvailableZoneIds()


The following example shows how to use getAvailableZoneIds.

import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.ZoneOffset;
import java.time.ZonedDateTime;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Set;
/* w w w .j  ava 2  s  .c  om*/
public class Main {
  public static void main(String[] args) {
    Set<String> allZones = ZoneId.getAvailableZoneIds();
    List<String> zoneList = new ArrayList<String>(allZones);

    LocalDateTime dt =;
    for (String s : zoneList) {
      ZoneId zone = ZoneId.of(s);
      ZonedDateTime zdt = dt.atZone(zone);
      ZoneOffset offset = zdt.getOffset();
      String out = String.format("%35s %10s%n", zone, offset);

The code above generates the following result.