LocalDate withDayOfYear() method in Java with Examples

The withDayOfYear() method of LocalDate class in Java returns a copy of this LocalDate with the day-of-year altered.

Syntax:

public LocalDate withDayOfYear(int dayOfYear)

Parameter: This method accepts a mandatory parameter dayOfYear which specifies the day-of-year to set in the result, from 1 to 365-366.



Returns: The function returns a LocalDate based on this date with the requested day, not null.

Exceptions: The function throws a DateTimeException when the day-of-year value is invalid.

Below programs illustrate the LocalDate.withDayOfYear() method:

Program 1:

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// Program to illustrate the withDayOfYear() method
  
import java.util.*;
import java.time.*;
  
public class GfG {
    public static void main(String[] args)
    {
  
        // Parses the date
        LocalDate dt1 = LocalDate.parse("2018-12-07");
        LocalDate result = dt1.withDayOfYear(01);
  
        // Prints the date with year
        System.out.println("The date with day of year is: " + result);
    }
}

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Output:

The date with day of year is: 2018-01-01

Program 2:

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// Program to illustrate the withDayOfYear() method
// Exceptions
import java.util.*;
import java.time.*;
import java.time.temporal.ChronoField;
  
public class GfG {
    public static void main(String[] args)
    {
  
        try {
            // Parses the date
            LocalDate dt1 = LocalDate.parse("2018-12-07");
            LocalDate result = dt1.withDayOfYear(370);
  
            // Prints the date with year
            System.out.println("The date with month is: " + result);
        }
        catch (Exception e) {
            System.out.println(e);
        }
    }
}

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Output:

java.time.DateTimeException: Invalid value for DayOfYear (valid values 1 - 365/366): 370

Reference: https://docs.oracle.com/javase/10/docs/api/java/time/LocalDate.html#withDayOfYear(int)



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