What is ObjectUtils.isNotEmpty in Java?

isNotEmpty() is a staticthe methods in Java that can be called without creating an object of the class. method of the ObjectUtils class that checks if the object passed as an argument is:

• not empty
• not null

The following types are supported by this method.

• CharSequence
• Array
• Collection
• Map

The method returns true if the input object of the above type is not empty or does not point to null. Otherwise, the method returns false.

How to import ObjectUtils

The definition of ObjectUtils 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 ObjectUtils class as follows.

import org.apache.commons.lang3.ObjectUtils;

Syntax

public static boolean isNotEmpty(final Object object)

Parameters

object: The object to test.

Return value

The method returns true if the input object of any of the types outlined above is not empty or is not null. Otherwise, the method returns false.

Code

Output

The output of ObjectUtils.isNotEmpty() when an empty list is passed is false
The output of ObjectUtils.isNotEmpty() when a non-empty list is passed is true
The output of ObjectUtils.isNotEmpty() when a null is passed is false

Explanation

Example 1: An empty list

• List<String> stringList = new ArrayList<>();

The method returns false when the list above is passed because the list is empty.

Example 2: A non-empty list

• list = ["hello"]

The method returns true when this list is passed because the list is not empty.

Example 3: A null object

• object = null

The method returns false as the input object points to null.