ChronoZonedDateTime with(TemporalAdjuster) method in Java with Examples

The with(TemporalAdjuster adjuster) method of the ChronoZonedDateTime interface is used to adjust this date-time using TemporalAdjuster and after adjustment returns the copy of adjusted date-time. The adjustment takes place using the specified adjuster strategy object. This instance of ChronoZonedDateTime is immutable and unaffected by this method call. A simple adjuster uses to set one of the fields, such as the year field where A more complex adjuster might set the time to the last day of the year.

Syntax:

default ChronoZonedDateTime with(TemporalAdjuster adjuster)

Parameters: This method accepts adjuster as parameter which is the adjuster to use.

Return value: This method returns a ChronoZonedDateTime based on this with the adjustment made.

Exception: This method throws following Exceptions:

• DateTimeException – if the adjustment cannot be made.
• ArithmeticException – if numeric overflow occurs.

Below programs illustrate the with() method:

Program 1:

// Java program to demonstrate
// ChronoZonedDateTime.with() method

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

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

        // create ChronoZonedDateTime object
        ChronoZonedDateTime time
            = ZonedDateTime
                  .parse(
                      "1918-10-25T23:12:38.543+02:00[Europe/Paris]");

        // print instance
        System.out.println("ChronoZonedDateTime before"
                           + " adjustment: "
                           + time);

        // apply with method of ChronoZonedDateTime
        ChronoZonedDateTime updatedlocal
            = time.with(Month.OCTOBER)
                  .with(TemporalAdjusters
                            .firstDayOfMonth());

        // print instance
        System.out.println("ChronoZonedDateTime after"
                           + " adjustment: "
                           + updatedlocal);
    }
}

Output:

ChronoZonedDateTime before adjustment: 1918-10-25T23:12:38.543Z[Europe/Paris]
ChronoZonedDateTime after adjustment: 1918-10-01T23:12:38.543+01:00[Europe/Paris]

Program 2:

// Java program to demonstrate
// ChronoZonedDateTime.with() method

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

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

        // create ChronoZonedDateTime object
        ChronoZonedDateTime time
            = ZonedDateTime
                  .parse(
                      "2018-12-06T19:21:12.123+05:30[Asia/Calcutta]");

        // print instance
        System.out.println("ChronoZonedDateTime before"
                           + " adjustment: "
                           + time);

        // apply with method of ChronoZonedDateTime
        ChronoZonedDateTime updatedlocal
            = time.with(Month.JANUARY)
                  .with(TemporalAdjusters
                            .firstDayOfMonth());

        // print instance
        System.out.println("ChronoZonedDateTime after"
                           + " adjustment: "
                           + updatedlocal);
    }
}

Output:

ChronoZonedDateTime before adjustment: 2018-12-06T19:21:12.123+05:30[Asia/Calcutta]
ChronoZonedDateTime after adjustment: 2018-01-01T19:21:12.123+05:30[Asia/Calcutta]

Reference: https://docs.oracle.com/javase/9/docs/api/java/time/chrono/ChronoZonedDateTime.html#with-java.time.temporal.TemporalAdjuster-