Instant atZone() method in Java

An Instant can be combined with a timezone to create a ZonedDateTime object using the atZone() method in the Instant class in Java. This method requires a single parameter i.e. the ZoneID and it returns the ZonedDateTime object.

A program that demonstrates this is given as follows

Example

 Live Demo

import java.time.*;
public class Demo {
   public static void main(String[] args) {
      Instant i = Instant.parse("2019-01-13T18:35:19.00Z");
      System.out.println("The Instant object is: " + i);
      ZonedDateTime zdt = i.atZone(ZoneId.of("Australia/Melbourne"));
      System.out.println("The ZonedDateTime object is: " + zdt);
   }
}

Output

The Instant object is: 2019-01-13T18:35:19Z
The ZonedDateTime object is: 2019-01-14T05:35:19+11:00[Australia/Melbourne]

Now let us understand the above program.

First the current instant is displayed. Then the Instant is combined with a timezone to create a ZonedDateTime object using the atZone() method. The ZonedDateTime object is displayed. A code snippet that demonstrates this is as follows:

Instant i = Instant.parse("2019-01-13T18:35:19.00Z");
System.out.println("The Instant object is: " + i);
ZonedDateTime zdt = i.atZone(ZoneId.of("Australia/Melbourne"));
System.out.println("The ZonedDateTime object is: " + zdt);