JAVA EE: How to use isValidMonthDay method of Year Class

Friday, 16 March 2018

How to use isValidMonthDay method of Year Class | Java 8 Date and Time

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YearDemo.java

import java.time.Month;

import java.time.MonthDay;

import java.time.Year;

public class YearDemo

{

    public static void main(String[] args)

    {

        Year year = Year.of(2017);

        /*

         * Parameters:

         * 

         * monthDay - the month-day to validate, null returns false

         * 

         * Returns:

         * 

         * true if the month and day are valid for this year

         */

        boolean isValidMonthDay = year

                .isValidMonthDay(MonthDay.of(Month.FEBRUARY, 1));

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

        isValidMonthDay = year.isValidMonthDay(MonthDay.of(Month.FEBRUARY, 30));

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

    }

}

Output

isValidMonthDay = true

Exception in thread "main" java.time.DateTimeException: Illegal value for DayOfMonth field, value 30 is not valid for month FEBRUARY

    at java.time.MonthDay.of(Unknown Source)

    at YearDemo.main(YearDemo.java:26)