LocalDate plusDays() Method in Java with Examples

The plusDays() method of a LocalDate class in Java is used to add the number of specified day in this LocalDate and return a copy of LocalDate. For example, 2018-12-31 plus one day would result in 2019-01-01. This instance is immutable and unaffected by this method call.

Syntax:

public LocalDate plusDays(long daysToAdd)

Parameters: This method accepts a single parameter daysToAdd which represents the days to add, may be negative.

Return Value: This method returns a LocalDate based on this date with the days added, not null.

Exception: This method throws DateTimeException if the result exceeds the supported date range.

Below programs illustrate the plusDays() method:

Program 1:

// Java program to demonstrate
// LocalDate.plusDays() method

import java.time.*;

public class GFG {
    public static void main(String[] args)
    {

        // create a LocalDate object
        LocalDate date
            = LocalDate.parse("2018-11-13");

        // print instance
        System.out.println("LocalDate before"
                           + " adding days: " + date);

        // add 5 days
        LocalDate returnvalue
            = date.plusDays(5);

        // print result
        System.out.println("LocalDate after "
                           + " adding days: " + returnvalue);
    }
}

Output:

LocalDate before adding days: 2018-11-13
LocalDate after  adding days: 2018-11-18

Program 2:

// Java program to demonstrate
// LocalDate.plusDays() method

import java.time.*;

public class GFG {
    public static void main(String[] args)
    {

        // create a LocalDate object
        LocalDate date
            = LocalDate.parse("2018-12-24");

        // print instance
        System.out.println("LocalDate before"
                           + " adding days: " + date);

        // add 15 days
        LocalDate returnvalue
            = date.plusDays(15);

        // print result
        System.out.println("LocalDate after "
                           + " adding days: " + returnvalue);
    }
}

Output:

LocalDate before adding days: 2018-12-24
LocalDate after  adding days: 2019-01-08

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