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The contains() method of CopyOnWriteArrayList in Java
The contains() method of the CopyOnWriteArrayList class is used to get the specified element. It returns TRUE if the element is in the List, else FALSE is returned.
The syntax is as follows
boolean contains(Object ob)
Here, ob is the element to be checked for existence. To work with CopyOnWriteArrayList class, you need to import the following package
import java.util.concurrent.CopyOnWriteArrayList;
The following is an example to implement CopyOnWriteArrayList class contains() method in Java
Example
import java.util.concurrent.CopyOnWriteArrayList;
public class Demo {
public static void main(String[] args) {
CopyOnWriteArrayList<Integer> arrList = new CopyOnWriteArrayList<Integer>();
arrList.add(100);
arrList.add(250);
arrList.add(400);
arrList.add(500);
arrList.add(650);
arrList.add(700);
arrList.add(800);
System.out.println("CopyOnWriteArrayList Elements = " + arrList);
System.out.println("The element at 2nd position = " + arrList.get(1));
System.out.println("Does the element exist in the List? = " + arrList.contains(400));
}
}Output
CopyOnWriteArrayList Elements = [100, 250, 400, 500, 650, 700, 800] The element at 2nd position = 250 Does the element exist in the List? = true
Updated on: 30-Jul-2019
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