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ConcurrentLinkedDeque isEmpty() method in Java with Examples
  • Last Updated : 20 Dec, 2018

The java.util.concurrent.ConcurrentLinkedDeque.isEmpty() is an in-built function in Java which checks whether the deque contains elements or not.

Syntax:

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:
ConcurrentLinkedDeque: []
Is deque empty: true

Example: 2




// 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

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