ChronoLocalDateTime atZone() method in Java with Examples
The atZone(ZoneId zone) method of ChronoLocalDateTime interface is used to combine this ChronoLocalDateTime with a time-zone whose ZoneId is given as parameter to create an ZonedDateTime object. This method takes ZoneId as a parameter and combines the time-zone with this ChronoLocalDateTime after operation returns a ChronoZonedDateTime object.
Syntax:
ChronoZonedDateTime<D> atZone(ZoneId zone)
Parameters: This method accepts one parameter zone which is the zone to combine to this ChronoLocalDateTime object. It should not be null.
Return Value: This method returns a ChronoZonedDateTime which is the combination of current zone of ChronoLocalDateTime and the zone passed as the parameter.
Below programs illustrate the ChronoLocalDateTime.atZone() method:
Program 1:
// Java program to demonstrate // ChronoLocalDateTime.atZone() method import java.time.*; import java.time.chrono.*; public class GFG { public static void main(String[] args) { // create an ChronoLocalDateTime object ChronoLocalDateTime date = LocalDateTime.parse( "2018-12-06T19:21:12" ); // print ChronoLocalDateTime Value System.out.println( "ChronoLocalDateTime: " + date); // create ZoneId object ZoneId zone = ZoneId.of( "Europe/Paris" ); // apply atZone method of ChronoLocalDateTime class ChronoZonedDateTime result = date.atZone(zone); // print results System.out.println( "ChronoZonedDateTime: " + result); } } |
ChronoLocalDateTime: 2018-12-06T19:21:12 ChronoZonedDateTime: 2018-12-06T19:21:12+01:00[Europe/Paris]
Program 2:
// Java program to demonstrate // ChronoLocalDateTime.atZone() method import java.time.*; import java.time.chrono.*; public class GFG { public static void main(String[] args) { // create an ChronoLocalDateTime object ChronoLocalDateTime date = LocalDateTime.parse( "2018-12-06T19:21:12" ); // print ChronoLocalDateTime Value System.out.println( "ChronoLocalDateTime: " + date); // create ZoneId object ZoneId zone = ZoneId.of( "Asia/Aden" ); // apply atZone method ChronoZonedDateTime result = date.atZone(zone); // print results System.out.println( "ChronoZonedDateTime: " + result); } } |
ChronoLocalDateTime: 2018-12-06T19:21:12 ChronoZonedDateTime: 2018-12-06T19:21:12+03:00[Asia/Aden]
Reference: https://docs.oracle.com/javase/9/docs/api/java/time/chrono/ChronoLocalDateTime.html#atZone-java.time.ZoneId-