The atDay() method of Year class in Java combines the current year with a day-of-year passed as parameter to it to create a LocalDate.
Syntax:
public LocalDate atDay(int dayOfYear)
Parameter: This method accepts a single parameter dayOfYear. It is the day-of-year to use. It can take values from 1 to 365-366.
Return Value: It returns a Local Date formed by the current year and a date of year passed as parameter to the function.
Exception: This method throws a DateTimeException, if the day of year passed in the parameter is not valid, that is zero or less, 366 or greater or equal to 366 and the current year is not a leap year.
Below programs illustrate the atDay() method of Year in Java:
Program 1:
Java
// Program to illustrate the atDay() methodimport java.util.*;import java.time.*;public class GfG { public static void main(String[] args) { // Creates a Year object Year thisYear = Year.of(2017); // Creates a local date with this // Year object and day passed to it LocalDate date = thisYear.atDay(31); System.out.println(date); }} |
2017-01-31
Program 2: To illustrate Exception.
Java
// Program to illustrate the atDay() methodimport java.util.*;import java.time.*;public class GfG { public static void main(String[] args) { // Creates a Year object Year thisYear = Year.of(2017); // Creates a local date with this // Year object and day passed to it try { LocalDate date = thisYear.atDay(367); System.out.println(date); } catch (Exception e) { System.out.println(e); } }} |
java.time.DateTimeException: Invalid value for DayOfYear (valid values 1 - 365/366): 367
Reference: https://docs.oracle.com/javase/8/docs/api/java/time/Year.html#atDay-int-
