package devmanuals.com; import java.util.*; public class ContainsElementInDeque { public static void main(String args[]) { Deque queue = new ArrayDeque(); queue.add("A"); queue.add("B"); queue.add("C"); queue.add("D"); boolean contain = queue.contains("C"); System.out.println("The Deque elements are : " + queue); System.out.println("Is the Deque have C : " + contain); } }