What is ArrayUtils.add in Java?
add is a static method of the ArrayUtils class that copies the elements of the given array to a new array and appends the given element to the end of the new array.
If the input array is null, add returns a new one-element array with the given element. The component type of the new array is the same as that of the given element.
Example 1
- array = [1,2,3,4,5]
- element - 10
Application of the add function will result in the following array: [1,2,3,4,5,10].
Example 2
- array = null
- element - 10
Application of the add function will result in the following array: [10].
ArrayUtilsis defined in theApache Commons Langpackage. To addApache Commons Langto the Maven Project, add the following dependency to thepom.xmlfile.
<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
ArrayUtilsclass as follows.
import org.apache.commons.lang3.ArrayUtils;
Syntax
public static int[] add(final int[] array, final int element)
Parameters
final int[] array: array of elements.final int element: the element to be added at the end of the array.
Return value
add returns a new array that contains the existing elements with the new element appended at the end of the new array.
Code
import org.apache.commons.lang3.ArrayUtils;public class Main {public static void main(String[] args) {int[] array = new int[]{1,2,3,4,5,2,3,2,2,4};System.out.print("Original Array - ");for(int i: array){System.out.print(i + " ");}int elementToAdd = 100;int[] result = ArrayUtils.add(array, elementToAdd);System.out.print("\nModified Array after adding element - ");for(int i: result){System.out.print(i + " ");}}}
Expected output
Original Array - 1 2 3 4 5 2 3 2 2 4
Modified Array after adding element - 1 2 3 4 5 2 3 2 2 4 100
