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Showing content from https://www.geeksforgeeks.org/java/zoneddatetime-ofstrict-method-in-java-with-examples/ below:

ZonedDateTime ofStrict() Method in Java with Examples

Last Updated : 13 Sep, 2021

ofStrict() method of ZonedDateTime class used to create an instance of ZonedDateTime strictly validating the combination of local date-time, offset and zone ID where all three Local date-time, ZoneOffset and ZoneId are passed as parameter.If the offset is invalid, an exception is thrown.
Syntax:

public static ZonedDateTime ofStrict(LocalDateTime localDateTime,
                                     ZoneOffset offset,
                                     ZoneId zone)

Parameters: This method accepts three parameters localDateTime which is the local date-time, offset which is the zone offset and zone which is the time-zone.
Return value: This method returns the zoned date-time.
Below programs illustrate the ofStrict() method:
Program 1:

Java


 // Java program to demonstrate
// ZonedDateTime.ofStrict() method

import java.time.*;

public class GFG {
    public static void main(String[] args)
    {

        // create local date time object
        LocalDateTime ldt
            = LocalDateTime
                  .parse("2019-01-29T23:55:59.00");

        // create ZoneOffset
        ZoneOffset zoneOffset
            = ZoneOffset.ofHours(1);

        // create a ZonID
        ZoneId zone
            = ZoneId.of("Europe/Paris");

        // apply ofStrict method
        // of ZonedDateTime class
        ZonedDateTime zt
            = ZonedDateTime
                  .ofStrict(
                      ldt, zoneOffset, zone);

        // print the result
        System.out.println("ZonedDateTime is "
                           + zt);
    }
}

Output:

ZonedDateTime is 2019-01-29T23:55:59+01:00[Europe/Paris]

Program 2:

Java


 // Java program to demonstrate
// ZonedDateTime.ofStrict() method

import java.time.*;

public class GFG {
    public static void main(String[] args)
    {

        // create local date-time object
        LocalDateTime ldt
            = LocalDateTime
                  .parse("2019-01-29T23:55:59.00");

        // create ZoneOffset
        ZoneOffset zoneOffset
            = ZoneOffset.ofHours(0);

        // create a ZonID
        ZoneId zone = ZoneId.of("UTC");

        // apply ofStrict method
        // of ZonedDateTime class
        ZonedDateTime zt
            = ZonedDateTime
                  .ofStrict(
                      ldt, zoneOffset, zone);

        // print the result
        System.out.println("ZonedDateTime is "
                           + zt);
    }
}

Output:

ZonedDateTime is 2019-01-29T23:55:59Z[UTC]

References:
https://docs.oracle.com/javase/10/docs/api/java/time/ZonedDateTime.html#ofStrict(java.time.LocalDateTime, java.time.ZoneOffset, java.time.ZoneId)

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