The systemDefault() method of the ZoneId class in Java is used to return the system default time-zone.
Syntax:
public String systemDefault()
Parameters: This method does not accepts any parameters.
Return Value: This method returns the zone ID.
Exceptions: This method throws following exception:
- DateTimeException – It throws this exception if the converted zone ID has an invalid format.
- ZoneRulesException – It throws this exception if the converted zone region ID cannot be found.
Below programs illustrate the systemDefault() method:
Program 1:
// Java program to demonstrate// ZoneId.systemDefault() method import java.time.*; public class GFG { public static void main(String[] args) { // create ZoneId object ZoneId zoneId = ZoneId.systemDefault(); // printresult System.out.println("ZoneId: " + zoneId); }} |
Output:
ZoneId: Etc/UTC
Program 2:
// Java program to demonstrate// ZoneId.systemDefault() method import java.time.*; public class GFG { public static void main(String[] args) { // create ZoneId object ZoneId zoneId = ZoneId.systemDefault(); if (zoneId.getId().equals("Etc/UTC")) System.out.println("This zone is Etc/UTC"); else System.out.println("This zone is not Etc/UTC"); }} |
Output:
This zone is Etc/UTC
References:
https://docs.oracle.com/javase/10/docs/api/java/time/ZoneId.html#systemDefault()
