MonthDay withMonth() Method in Java with Examples

withMonth(int month) method of the MonthDay class used to alter the month-of-year of MonthDay object using month passed as a parameter and after that method returns the copy of altered MonthDay.If the day-of-month is invalid for the specified month, the day will be adjusted to the last valid day-of-month. This instance is immutable and unaffected by this method call.

Syntax:

public MonthDay withMonth(int month)

Parameters: This method accepts month as parameter which is the month-of-year to set in the returned month-day, from 1 (January) to 12 (December).

Return value: This method returns a MonthDay based on this month-day with the requested month.

Exception: This method throws DateTimeException if the month-of-year value is invalid.

Below programs illustrate the withMonth() method:
Program 1:

// Java program to demonstrate
// MonthDay.withMonth() method

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

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

        // create a MonthDay object
        MonthDay monthday
            = MonthDay.of(8, 28);

        // print instance
        System.out.println("MonthDay before"
                           + " applying method: "
                           + monthday);

        // apply withMonth method of MonthDay class
        MonthDay updatedlocal = monthday.withMonth(1);

        // print instance
        System.out.println("MonthDay after"
                           + " applying method: "
                           + updatedlocal);
    }
}

Output:

MonthDay before applying method: --08-28
MonthDay after applying method: --01-28

Program 2:

// Java program to demonstrate
// MonthDay.withMonth() method

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

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

        // create a MonthDay object
        MonthDay monthday
            = MonthDay.of(10, 31);

        // print instance
        System.out.println("MonthDay before"
                           + " applying method: "
                           + monthday);

        // apply withMonth method of MonthDay class
        MonthDay updatedlocal = monthday.withMonth(5);

        // print instance
        System.out.println("MonthDay after"
                           + " applying method: "
                           + updatedlocal);
    }
}

Output:

MonthDay before applying method: --10-31
MonthDay after applying method: --05-31

References: https://docs.oracle.com/javase/10/docs/api/java/time/MonthDay.html#withMonth(int)