Last Updated : 23 Mar, 2022
The withZoneSameInstant() method of a ZonedDateTime class is used to return a copy of this ZonedDateTime object by changing the time-zone and without the instant. This method is based on retaining the same instant, thus gaps and overlaps in the local timeline have no effect on the result.
Syntax:
public ZonedDateTime withZoneSameInstant(ZoneId zone)
Parameters: This method accepts one single parameter zone the time-zone to change to. It should not be null.
Return value: This method returns a ZonedDateTime based on this date-time with the requested zone.
Exception Thrown: DateTimeException if the result exceeds the supported date range.
Example 1:
Java
// Java program to demonstrate
// ZonedDateTime.withZoneSameInstant() method
// Importing required classes
import java.time.*;
// Main class
public class GFG {
// Main driver method
public static void main(String[] args)
{
// Creating a ZonedDateTime object
ZonedDateTime zonedDT = ZonedDateTime.parse(
"2018-12-06T19:21:12.123+05:30[Asia/Calcutta]");
// Printing ZonedDateTime of Calcutta on console
System.out.println("ZonedDateTime of Calcutta: "
+ zonedDT);
// Applying withZoneSameInstant()
ZonedDateTime zonedDT2
= zonedDT.withZoneSameInstant(
ZoneId.of("Pacific/Fiji"));
// Now printing ZonedDateTime of Fuji
// after withZoneSameInstant()
System.out.println("ZonedDateTime of Fuji: "
+ zonedDT2);
}
}
ZonedDateTime of Calcutta: 2018-12-06T19:21:12.123+05:30[Asia/Calcutta] ZonedDateTime of Fuji: 2018-12-07T02:51:12.123+13:00[Pacific/Fiji]
Example 2:
Java
// Java program to Demonstrate
// ZonedDateTime.withZoneSameInstant() method
// Importing required classes
import java.time.*;
// Main class
public class GFG {
// Main driver method
public static void main(String[] args)
{
// Creating a ZonedDateTime object and
// passing date and time of Europe/Paris
ZonedDateTime zonedDT = ZonedDateTime.parse(
"2018-10-25T23:12:31.123+02:00[Europe/Paris]");
// Printing ZonedDateTime of Paris on console
// before applying withZoneSameInstant() method
System.out.println("ZonedDateTime of Paris: "
+ zonedDT);
// Now applying withZoneSameInstant() method
ZonedDateTime zonedDT2
= zonedDT.withZoneSameInstant(
ZoneId.of("Canada/Yukon"));
// Printing ZonedDateTime
// after applying withZoneSameInstant()
System.out.println("ZonedDateTime of Yukon: "
+ zonedDT2);
}
}
ZonedDateTime of Paris: 2018-10-25T23:12:31.123+02:00[Europe/Paris] ZonedDateTime of Yukon: 2018-10-25T14:12:31.123-07:00[Canada/Yukon]
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