YearMonth atEndOfMonth() method in Java

The atEndOfMonth() method of YearMonth class in Java is used to return a LocalDate of the last day of month based on this YearMonth object with which it is used.

Syntax:

public LocalDate atEndOfMonth()

Parameter: This method does not accepts any parameter.

Return Value: It returns a Local Date with the last day of the current month as specified by this YearMonth object. This method does not returns a NUll value.

Below programs illustrate the atEndOfMonth() method of YearMonth in Java:
Program 1:

// Programt to illustrate the atEndOfMonth() method

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

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

        // Creates a YearMonth object
        YearMonth thisYearMonth = YearMonth.of(2017, 8);

        // Creates a local date with this
        // YearMonth object passed to it
        // Last day of this month is 31
        LocalDate date = thisYearMonth.atEndOfMonth();

        System.out.println(date);
    }
}

Output:

2017-08-31

Program 2: This method also take cares of Leap Years.

// Programt to illustrate the atEndOfMonth() method

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

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

        // Creates a YearMonth object
        YearMonth thisYearMonth = YearMonth.of(2016, 2);

        // Creates a local date with this
        // YearMonth object passed to it
        // Last day of February is
        // 29 as 2016 is a leap year
        LocalDate date = thisYearMonth.atEndOfMonth();

        System.out.println(date);
    }
}

Output:

2016-02-29

Reference: https://docs.oracle.com/javase/8/docs/api/java/time/YearMonth.html#atEndOfMonth–