What is DateUtils.addDays() in Java?

Overview

addDays() is a staticThe methods in Java that can be called without creating an object of the class. method of the DateUtils class that is used to add a given number of days to the Date object. It returns a new Date object. However, the original Date object remains unchanged.

How to import DateUtils

The definition of DateUtils can be found in the Apache Commons Lang package, which we can add to the Maven project by adding the following dependency to the pom.xml file:

<dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
            <version>3.12.0</version>
</dependency>

For other versions of the commons-lang package, refer to the Maven Repository.

You can import the DateUtils class as follows:

import org.apache.commons.lang3.time.DateUtils;

Syntax

public static Date addDays(final Date date, final int amount)

Parameters

• final Date date: The Date object to which a number of days have to be added.
• final int amount: The number of days to add to the Date object. Can be positive or negative.

Return value

This method returns a new Date object with the number of days added.

Code

In the code snippet below, we assign the number of days to add to the daysToAdd variable. We then pass this variable to the addDays() method along with the currDate object in order to add the number of days to the currDate object. Finally, we print the new Date object to the console.

Output

The output of the code will be as follows:

Sun Nov 21 03:04:22 IST 2021 + 5 days = Fri Nov 26 03:04:22 IST 2021