ConcurrentLinkedDeque contains() method in Java with Examples
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( "Beginner" ); cld.add( "4" ); cld.add( "Beginner" ); // 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, Beginner, 4, Beginner] 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( "Beginner" ); cld.add( "4" ); cld.add( "Beginner" ); // Displaying the Deque System.out.println( "ConcurrentLinkedDeque: " + cld); // Check if Beginner is present using contains() if (cld.contains( "Beginner" )) { // Displaying message System.out.println( "Beginner is present" ); } else { // Displaying message System.out.println( "Beginner not present" ); } } } |
Output:
ConcurrentLinkedDeque: [Welcome, To, Beginner, 4, Beginner] Beginner is present
Reference: https://docs.oracle.com/javase/9/docs/api/java/util/concurrent/ConcurrentLinkedDeque.html#contains-java.lang.Object-
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