LocalDate withMonth() method in Java with Examples

The withMonth() method of LocalDate class in Java returns a copy of this LocalDate with the month-of-year altered.

Syntax:

public LocalDate withMonth(int month)

Parameter: This method accepts a mandatory parameter month which specifies the month-of-year to set in the result, from 1 i.e., January to 12 i.e., December.

Returns: The function returns a LocalDate based on this date with the requested month, not null.

Exceptions: The function throws a DateTimeException when the month-of-year value is invalid.

Below programs illustrate the LocalDate.withMonth() method:

Program 1:

// Program to illustrate the withMonth() method

import java.util.*;
import java.time.*;

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

        // Parses the date
        LocalDate dt1 = LocalDate.parse("2018-12-07");
        LocalDate result = dt1.withMonth(01);

        // Prints the date with year
        System.out.println("The date with month is: " + result);
    }
}

Output:

The date with month is: 2018-01-07

Program 2:

// Program to illustrate the withMonth() method
// Exceptions
import java.util.*;
import java.time.*;
import java.time.temporal.ChronoField;

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

        try {
            // Parses the date
            LocalDate dt1 = LocalDate.parse("2018-12-07");
            LocalDate result = dt1.withMonth(13);

            // Prints the date with year
            System.out.println("The date with month is: " + result);
        }
        catch (Exception e) {
            System.out.println(e);
        }
    }
}

Output:

java.time.DateTimeException: Invalid value for MonthOfYear (valid values 1 - 12): 13

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