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LocalDateTime withDayOfYear() method
An immutable copy of a LocalDateTime with the day of year altered as required is done using the method withDayOfYear() in the LocalDateTime class in Java. This method requires a single parameter i.e. the day of year that is to be set in the LocalDateTime and it returns the LocalDateTime with the day of year altered as required.
A program that demonstrates this is given as follows −
Example
import java.time.*;
public class Main {
public static void main(String[] args) {
LocalDateTime ldt1 = LocalDateTime.parse("2019-02-18T23:15:30");
System.out.println("The LocalDateTime is: " + ldt1);
LocalDateTime ldt2 = ldt1.withDayOfYear(5);
System.out.println("The LocalDateTime with day of year altered is: " + ldt2);
}
}Output
The LocalDateTime is: 2019-02-18T23:15:30 The LocalDateTime with day of year altered is: 2019-01-05T23:15:30
Now let us understand the above program.
First the LocalDateTime is displayed. Then the LocalDateTime with the day of year altered to 5 is displayed using the method withDayOfYear(). A code snippet that demonstrates this is as follows −
LocalDateTime ldt1 = LocalDateTime.parse("2019-02-18T23:15:30");
System.out.println("The LocalDateTime is: " + ldt1);
LocalDateTime ldt2 = ldt1.withDayOfYear(5);
System.out.println("The LocalDateTime with day of year altered is: " + ldt2);
Updated on: 30-Jul-2019
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