OffsetDateTime ofInstant() method in Java with Examples

The ofInstant(Instant instant, ZoneId zone) method of the OffsetDateTime class in Java is used to create an instance of OffsetDateTime from the specified instant and zoneID. Since there is only one valid offset for each instant in UTC/Greenwich, it is simple to derive an offset from the latter.

Syntax:

public static OffsetDateTime
       ofInstant(Instant instant,
                 ZoneId zone)

Parameters: This method accepts two parameters:

• instant – It is of Instant type and represents the instant at which offsetdatetime is created. It should not be null.
• zone – It is of ZoneId type and represents the zone for the time. It should not be null.

Return value: This method returns the OffsetDateTime created from the specified parameters.

Exception: This method throws DateTimeException if the result is beyond the supported range.

Below programs illustrate the ofInstant() method of OffsetDateTime class in Java:

Program 1:

// Java program to demonstrate
// OffsetDateTime ofInstant() method

import java.time.*;
import java.time.temporal.*;

public class GFG {
    public static void main(String[] args)
    {
        // Create OffsetDateTime object
        OffsetDateTime offsetdatetime
            = OffsetDateTime.ofInstant(
                Instant.now(),
                ZoneId.systemDefault());

        // Print date-time
        System.out.println("DATE-TIME: "
                           + offsetdatetime);
    }
}

Output:

DATE-TIME: 2020-05-20T04:05:38.471Z

Program 2:

// Java program to demonstrate
// OffsetDateTime ofInstant() method

import java.time.*;
import java.time.temporal.*;

public class GFG {
    public static void main(String[] args)
    {
        // Create Instant object
        Instant instant = Instant.now(
            Clock.systemUTC());

        // Create ZoneId object
        ZoneId zone = ZoneId.of("Z");

        // Create OffsetDateTime object
        OffsetDateTime offsetdatetime
            = OffsetDateTime.ofInstant(
                instant,
                zone);

        // Print date-time
        System.out.println("DATE-TIME: "
                           + offsetdatetime);
    }
}

Output:

DATE-TIME: 2020-05-20T04:05:42.166Z

References:
https://docs.oracle.com/javase/10/docs/api/java/time/OffsetDateTime.html#ofInstant(java.time.Instant, java.time.ZoneId)