JAVA EE: How to use at methods of Year Class

Friday 16 March 2018

How to use at methods of Year Class | Java 8 Date and Time

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YearDemo1.java

import java.time.LocalDate;

import java.time.Year;

import java.time.YearMonth;

public class YearDemo1

{

    public static void main(String[] args)

    {

        Year year = Year.of(2017);

        /*

         * Parameters:

         * 

         * dayOfYear - the day-of-year to use, from 1 to 365-366

         * 

         * Returns:

         * 

         * the local date formed from this year and the specified date

         * of year, not null

         */

        LocalDate localDate = year.atDay(300);

        System.out.println(localDate);

        /*

         * Parameters:

         * 

         * month - the month-of-year to use, from 1 (January) to 12

         * (December)

         * 

         * Returns:

         * 

         * the year-month formed from this year and the specified

         * month, not null

         */

        YearMonth yearMonth = year.atMonth(2);

        System.out.println(yearMonth);

    }

}

Output

2017-10-27

2017-02

YearDemo2.java

import java.time.LocalDate;

import java.time.Month;

import java.time.MonthDay;

import java.time.Year;

public class YearDemo2

{

    public static void main(String[] args)

    {

        Year year = Year.of(2017);

        System.out.println("year = "+year);

        MonthDay monthDay = MonthDay.of(Month.MARCH, 29);

        System.out.println("monthDay = "+monthDay);

        /*

         * Parameters:

         * 

         * monthDay - the month-day to use, not null

         * 

         * Returns:

         * 

         * the local date formed from this year and the specified

         * month-day, not null

         */

        LocalDate localDate = year.atMonthDay(monthDay);

        System.out.println(localDate);

    }

}

Output

year = 2017

monthDay = --03-29

2017-03-29

YearDemo3.java

import java.time.Month;

import java.time.Year;

import java.time.YearMonth;

public class YearDemo3

{

    public static void main(String[] args)

    {

        Year year = Year.of(2017);

        /*

         * Parameters:

         * 

         * month - the month-of-year to use, not null

         * 

         * Returns:

         * 

         * the year-month formed from this year and the specified

         * month, not null

         */

        YearMonth yearMonth = year.atMonth(Month.JANUARY);

        System.out.println(yearMonth);

    }

}