# Period withDays() method in Java

Java 8Object Oriented ProgrammingProgramming

An immutable copy of a Period with the number of days as required is done using the method withDays() in the Period class in Java. This method requires a single parameter i.e. the number of days in the Period and it returns the Period with the number of days as required.

A program that demonstrates this is given as follows

## Example

Live Demo

import java.time.Period;
public class Demo {
public static void main(String[] args) {
String period = "P5Y7M15D";
Period p1 = Period.parse(period);
System.out.println("The Period is: " + p1);
Period p2 = p1.withDays(3);
System.out.println("The Period with days altered to 3 is: " + p2);
}
}

## Output

The Period is: P5Y7M15D
The Period with days altered to 3 is: P5Y7M3D

Now let us understand the above program.

First the Period is displayed. Then the Period with the number of days altered to 3 is displayed using the method withDays(). A code snippet that demonstrates this is as follows:

String period = "P5Y7M15D";
Period p1 = Period.parse(period);
System.out.println("The Period is: " + p1);
Period p2 = p1.withDays(3);
System.out.println("The Period with days altered to 3 is: " + p2);
Updated on 30-Jul-2019 22:30:25