TemporalAdjusters lastInMonth() method in Java with Examples

The lastInMonth(DayOfWeek) method of a TemporalAdjusters class is used to return a TemporalAdjuster object which can be used to get a new Date object which is the last date of the same month with the same matching DayOfWeek as passed as a parameter from any Date object on which this TemporalAdjuster is applied. Syntax:

public static TemporalAdjuster lastInMonth(DayOfWeek dayOfWeek)

Parameters: This method accepts dayOfWeek which can be used to get a new Date object which is the last date of the same month with the same matching DayOfWeek. Return value: This method returns the last in month adjuster, not null. Below programs illustrate the TemporalAdjusters.lastInMonth() method: Program 1:

Java

// Java program to demonstrate
// TemporalAdjusters.lastInMonth()

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

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

        // get TemporalAdjuster with
        // the last in month adjuster
        TemporalAdjuster temporalAdjuster
            = TemporalAdjusters.lastInMonth(
                DayOfWeek.SUNDAY);

        // using adjuster for local date-time
        LocalDate localDate
            = LocalDate.of(1998, 10, 31);
        LocalDate lastInMonth
            = localDate.with(temporalAdjuster);

        // print
        System.out.println(
            "last date in month having"
            + " sunday for localdate "
            + localDate + " is: "
            + lastInMonth);
    }
}

Output:

last date in month having sunday for localdate 1998-10-31 is: 1998-10-25

Program 2:

Java

// Java program to demonstrate
// TemporalAdjusters.lastInMonth() method

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

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

        // get TemporalAdjuster with
        // the last in month adjuster
        TemporalAdjuster temporalAdjuster
            = TemporalAdjusters.lastInMonth(
                DayOfWeek.TUESDAY);

        // using adjuster for local date time
        LocalDate localDate
            = LocalDate.of(2029, 12, 11);
        LocalDate lastInMonth
            = localDate.with(temporalAdjuster);

        // print
        System.out.println(
            "The last date in a month "
            + "having TUESDAY for localdate "
            + localDate + " is: "
            + lastInMonth);
    }
}

Output:

The last date in a month having TUESDAY for localdate 2029-12-11 is: 2029-12-25

References: https://docs.oracle.com/javase/10/docs/api/java/time/temporal/TemporalAdjusters.html#lastInMonth(java.time.DayOfWeek)