Java LocalDate withDayOfYear() Method

Java withDayOfYear() method is used to get a date with the new day-of-year. It returns a copy of this LocalDate with the day-of-year altered. For example, we have a date 2015年01月14日 then setting day-of-year as 20 will result in 2015年01月20日.

If the resulting date is invalid, an exception is thrown.

It takes an argument of int type. The syntax of the method is given.

Syntax

public LocalDate withDayOfYear(int dayOfYear)

Parameters:

dayOfYear - the day-of-year to set in the resulted date.

Returns:

Returns a LocalDate based on this date with the requested day.

Time for an Example:

Let's take an example to create a new date by setting a new value of a day-of-year. Here, we are using withDayOfYear() method to set a new day for the date.

import java.time.LocalDate;
public class DateDemo {
	
	public static void main(String[] args){ 
		
		LocalDate localDate = LocalDate.of(2002, 01, 10);
		System.out.println(localDate);
		localDate = localDate.withDayOfYear(30);
		System.out.println("New Date : "+localDate);
	}
}

2002年01月10日
New Date : 2002年01月30日

Time for another Example:

Let's take another example to understand the withDayOfYear() method. Here, we are setting day-of-year as 300 and getting a new date.

import java.time.LocalDate;
public class DateDemo {
	
	public static void main(String[] args){ 
		
		LocalDate localDate = LocalDate.of(2002, 01, 10);
		System.out.println(localDate);
		localDate = localDate.withDayOfYear(300);
		System.out.println("New Date : "+localDate);
	}
}

2002年01月10日
New Date : 2002年10月27日

Live Example:

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