ConcurrentLinkedDeque isEmpty() method in Java with Examples
Last Updated :
11 Jul, 2025
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The java.util.concurrent.ConcurrentLinkedDeque.isEmpty() is an in-built function in Java which checks whether the deque contains elements or not.
Syntax:
Java
Java
public boolean isEmpty()Parameters: The function does not accepts any parameter. Return: This method returns a boolean value stating whether this deque is empty or not. Below programs illustrate the ConcurrentLinkedDeque.isEmpty() method: Example: 1
// Java Program Demonstrate
// isEmpty() method of ConcurrentLinkedDeque
import java.util.concurrent.*;
class ConcurrentLinkedDequeDemo {
public static void main(String[] args)
{
ConcurrentLinkedDeque<String> cld
= new ConcurrentLinkedDeque<String>();
// Displaying the existing LinkedDeque
System.out.println("ConcurrentLinkedDeque: "
+ cld);
// Check if the queue is empty
// using isEmpty() method
System.out.println("Is deque empty: "
+ cld.isEmpty());
}
}
Output:
Example: 2
ConcurrentLinkedDeque: [] Is deque empty: true
// Java Program Demonstrate
// isEmpty() method of ConcurrentLinkedDeque
import java.util.concurrent.*;
class ConcurrentLinkedDequeDemo {
public static void main(String[] args)
{
ConcurrentLinkedDeque<String> cld
= new ConcurrentLinkedDeque<String>();
cld.add("GFG");
cld.add("Gfg");
cld.add("GeeksforGeeks");
cld.add("Geeks");
// Displaying the existing LinkedDeque
System.out.println("ConcurrentLinkedDeque: "
+ cld);
// Check if the queue is empty
// using isEmpty() method
System.out.println("Is deque empty: "
+ cld.isEmpty());
}
}
Output:
ConcurrentLinkedDeque: [GFG, Gfg, GeeksforGeeks, Geeks] Is deque empty: false
