YearMonth atDay() method in Java

Month firstDayOfYear() method in Java

Last Updated : 22 Mar, 2019

The firstDayOfYear() is a built-in method of the Month ENUM which is used to get the day of year corresponding to the first day of this month. Syntax:

public int firstDayOfYear(boolean leapYear)

Parameters: This method accepts a single parameter leapYear, which is a boolean flag variable indicating whether this Year is a leap year or not. Return Value: This method returns the day-of-year corresponding to the first day of this month. Below programs illustrate the above method: Program 1:

Java

import java.time.*;
import java.time.Month;
import java.time.temporal.Temporal;

class DayOfWeekExample {
    public static void main(String[] args)
    {
        // Set the month to february
        Month month = Month.of(2);

        // Get corresponding day-of-year of the
        // first day of february in a non-leap year
        System.out.println(month.firstDayOfYear(false));
    }
}

Output:

Program 2:

Java

import java.time.*;
import java.time.Month;
import java.time.temporal.Temporal;

class DayOfWeekExample {
    public static void main(String[] args)
    {
        // Set the month to february
        Month month = Month.of(3);

        // Get corresponding day-of-year of the
        // first day of March in a leap year
        System.out.println(month.firstDayOfYear(true));
    }
}

Output:

Reference: https://docs.oracle.com/javase/8/docs/api/java/time/Month.html#firstDayOfYear-boolean-

YearMonth atDay() method in Java

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