contains is a static method of the ArrayUtils class that checks whether the given array contains the given element or not.
ArrayUtils is defined in the Apache Commons Lang package. The package can be added 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.
ArrayUtilsYou can import the ArrayUtils class as follows:
import org.apache.commons.lang3.ArrayUtils;
public static boolean contains(final int[] array, final int valueToFind)
final int[] array: array of elementsfinal int valueToFind: element to find in the arrayThis method returns true if the array contains the element, and returns false otherwise.
array = [1,2,3,4,5]elementToFind - 3Applying the contains function will result in true, as the array contains the given element.
array = [1,2,3,4,5]elementToFind - 100Applying the contains function will result in false, as the array does not contain the given element.
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};int elementToFind = 3;boolean check = ArrayUtils.contains(array, elementToFind);System.out.println("Array contains element " + elementToFind + " - " + check);elementToFind = 100;check = ArrayUtils.contains(array, elementToFind);System.out.println("Array contains element " + elementToFind + " - " + check);}}
Array contains element 3 - true
Array contains element 100 - false