withDayOfMonth(int dayOfMonth) method of the MonthDay class used to alter the day-of-month of MonthDay object using dayOfMonth passed as a parameter and after that method returns the copy of altered MonthDay.An exception is thrown If the day-of-month value is invalid for the specified month after altering operation.
Syntax:
public MonthDay withDayOfMonth(int dayOfMonth)
Parameters: This method accepts dayOfMonth as parameter which is the day-of-month to set in the return month-day, from 1 to 31.
Return value: This method returns a MonthDay based on this month-day with the requested day.
Exception: This method throws DateTimeException if the day-of-month value is invalid, or if the day-of-month is invalid for the month.
Below programs illustrate the withDayOfMonth() method:
Program 1:
// Java program to demonstrate // MonthDay.withDayOfMonth() 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 withDayOfMonth method
// of MonthDay class
MonthDay updatedlocal
= monthday.withDayOfMonth( 21 );
// print instance
System.out.println( "MonthDay after"
+ " applying method: "
+ updatedlocal);
}
} |
MonthDay before applying method: --08-28 MonthDay after applying method: --08-21
Program 2:
// Java program to demonstrate // MonthDay.withDayOfMonth() 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 withDayOfMonth method
// of MonthDay class
MonthDay updatedlocal
= monthday.withDayOfMonth( 12 );
// print instance
System.out.println( "MonthDay after"
+ " applying method: "
+ updatedlocal);
}
} |
MonthDay before applying method: --10-31 MonthDay after applying method: --10-12
References: https://docs.oracle.com/javase/10/docs/api/java/time/MonthDay.html#withDayOfMonth(int)