The java.util.concurrent.ConcurrentLinkedDeque.contains() method is an inbuilt method in Java which checks if the specified element, passed as a parameter, is present in the deque or not.
Syntax:
public boolean contains(Object elem)
Parameters: The method accepts a parameter elem which checks if the specified element is present in the deque or not.
Return Value: The function returns True if the element is present in the deque and returns False otherwise.
Below programs illustrate the ConcurrentLinkedDeque.contains() method:
Program 1:
// Java Program to Demonstrate contains()// method of ConcurrentLinkedDeque import java.util.concurrent.*; class GFG { public static void main(String[] args) { // Creating an empty Deque ConcurrentLinkedDeque<String> cld = new ConcurrentLinkedDeque<String>(); // Add elements into the Deque cld.add("Welcome"); cld.add("To"); cld.add("Geeks"); cld.add("4"); cld.add("Geeks"); // Displaying the Deque System.out.println("ConcurrentLinkedDeque: " + cld); // Check if GFG is present using contains() if (cld.contains("GFG")) { // Displaying message System.out.println("GFG is present"); } else { // Displaying message System.out.println("GFG is not present"); } }} |
Output:
ConcurrentLinkedDeque: [Welcome, To, Geeks, 4, Geeks] GFG is not present
Program 2:
// Java Program to Demonstrate contains()// method of ConcurrentLinkedDeque import java.util.concurrent.*; class GFG { public static void main(String[] args) { // Creating an empty Deque ConcurrentLinkedDeque<String> cld = new ConcurrentLinkedDeque<String>(); // Add elements into the Deque cld.add("Welcome"); cld.add("To"); cld.add("Geeks"); cld.add("4"); cld.add("Geeks"); // Displaying the Deque System.out.println("ConcurrentLinkedDeque: " + cld); // Check if Geeks is present using contains() if (cld.contains("Geeks")) { // Displaying message System.out.println("Geeks is present"); } else { // Displaying message System.out.println("Geeks not present"); } }} |
Output:
ConcurrentLinkedDeque: [Welcome, To, Geeks, 4, Geeks] Geeks is present
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