IsoChronology zonedDateTime(Instant, ZoneId) method in Java with Example

The zonedDateTime() method of java.time.chrono.IsoChronology class is used to retrieve the date and time of a particular zone according to Iso calendar from a particular instant. Syntax:

public ZonedDateTime zonedDateTime(Instant instant,
                                   ZoneId zone)

Parameter: This method takes the following arguments as parameter.

• instant: which is the object of type instant
• zone: which is the object of type zoneId

Return Value: This method returns the date and time of a particular zone according to Iso calendar from a particular instant. Below are the examples to illustrate the zonedDateTime() method: Example 1:

Java

// Java program to demonstrate
// zonedDateTime() method

import java.util.*;
import java.io.*;
import java.time.*;
import java.time.chrono.*;

public class GFG {
    public static void main(String[] argv)
    {
        try {
            // creating and initializing LocalDate Object
            LocalDate hidate = LocalDate.now();

            // getting IsoChronology used in LocalDate
            IsoChronology crono = hidate.getChronology();

            // getting LocalDate and time for the
            // given Instant and ZoneId
            // by using zonedDateTime() method
            ChronoZonedDateTime<LocalDate> date
                = crono.zonedDateTime(
                    Instant.now(),
                    ZoneId.systemDefault());

            // display the result
            System.out.println("LocalDate and time is: "
                               + date);
        }
        catch (DateTimeException e) {
            System.out.println("passed parameter can "
                               + "not form a date");
            System.out.println("Exception thrown: " + e);
        }
    }
}

Output:

LocalDate and time is: 2020-03-10T02:37:13.036Z[Etc/UTC]

Example 2:

Java

// Java program to demonstrate
// zonedDateTime() method

import java.util.*;
import java.io.*;
import java.time.*;
import java.time.chrono.*;

public class GFG {
    public static void main(String[] argv)
    {
        try {
            // creating and initializing LocalDate Object
            LocalDate hidate = LocalDate.now();

            // getting IsoChronology used in LocalDate
            IsoChronology crono = hidate.getChronology();

            // getting HijrahDate and time for the
            // given Instant and ZoneId
            // by using zonedDateTime() method
            ChronoZonedDateTime<LocalDate> date
                = crono.zonedDateTime(
                    Instant.ofEpochSecond(25000),
                    ZoneId.systemDefault());

            // display the result
            System.out.println("LocalDate and time is: "
                               + date);
        }
        catch (DateTimeException e) {
            System.out.println("passed parameter can "
                               + "not form a date");
            System.out.println("Exception thrown: " + e);
        }
    }
}

Output:

LocalDate and time is: 1970-01-01T06:56:40Z[Etc/UTC]

Reference: https://docs.oracle.com/javase/9/docs/api/java/time/chrono/IsoChronology.html#zonedDateTime-java.time.Instant-java.time.ZoneId-