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ZoneOffset getAvailableZoneIds() method in Java with Examples
  • Last Updated : 13 Dec, 2018

The getAvailableZoneIds() method of the ZoneOffset class of java.time package is used to get the set of available zone IDs. This set includes all available region-based IDs. The ID can be passed to of(String) to create a ZoneId. The set of zone IDs can increase over time, although in a typical application the set of IDs is fixed.

Syntax:

public static Set getAvailableZoneIds()

Parameters: This method does not accepts any parameter.

Return value: This method returns Set which are a modifiable copy of the set of zone IDs.

Below examples illustrate the ZoneOffset.getAvailableZoneIds() method:



Example 1:




// Java code to illustrate getAvailableZoneIds() method
  
import java.time.*;
import java.util.*;
  
public class GFG {
    public static void main(String[] args)
    {
  
        // Get the ZoneOffset instance
        ZoneOffset zoneOffset
            = ZoneOffset.of("+05:30");
  
        // get available zones
        // using getAvailableZoneIds()
        Set<String> zoneIds
            = zoneOffset.getAvailableZoneIds();
  
        // print first record
        System.out.println("First ZoneId in list:"
                           + zoneIds.iterator().next());
    }
}
Output:
First ZoneId in list:Asia/Aden

Example 2:




// Java code to illustrate getAvailableZoneIds() method
  
import java.time.*;
import java.util.*;
  
public class GFG {
    public static void main(String[] args)
    {
  
        // Get the ZoneOffset instance
        ZoneOffset zoneOffset
            = ZoneOffset.of("Z");
  
        // get available zones
        // using getAvailableZoneIds()
        Set<String> zoneIds
            = zoneOffset.getAvailableZoneIds();
  
        // print first record
        System.out.println("First ZoneId in list:"
                           + zoneIds.iterator().next());
    }
}
Output:
First ZoneId in list:Asia/Aden

Reference: Oracle Doc

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