ConcurrentLinkedDeque push() method in Java with Examples

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

// 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

// 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

ConcurrentLinkedDeque push() method in Java with Examples

P

ProgrammerAnvesh

Improve

Article Tags :

Practice Tags :

Similar Reads

ConcurrentLinkedDeque iterator() method in Java with Example

The Java.util.concurrent.ConcurrentLinkedDeque.iterator() method is used to return an iterator of the same elements as that of the ConcurrentLinkedDeque. The elements are returned in random order from what was present in the deque. Syntax: Iterator iterate_value = ConcurrentLinkedDeque.iterator(); P

ConcurrentLinkedDeque pop() method in Java with Examples

The Java.util.ConcurrentLinkedDeque.pop() method in Java is used to pop an element from the ConcurrentLinkedDeque. The element is popped from the top of the ConcurrentLinkedDeque and is removed from the same.Syntax: ConcurrentLinkedDeque.pop() Parameters: The method does not take any parameters.Retu

ConcurrentLinkedDeque offer() method in Java with Examples

The java.util.concurrent.ConcurrentLinkedDeque.offer() method is an inbuilt method in Java which inserts the specified element, passed as a parameter, to the deque. Syntax: public boolean offer(E elem) Parameters: The method accepts a parameter elem which species the element to be inserted to the de

ConcurrentLinkedDeque push() method in Java with Examples

The push() method of ConcurrentLinkedDeque class is an in-built function in Java which pushes an element onto the stack represented by this deque (in other words, at the head of this deque) if it is possible to do so immediately without violating capacity restrictions, returning true upon success an

ConcurrentLinkedDeque poll() method in Java with Example

The poll() method of ConcurrentLinkedDeque returns the front element in the Deque container and deletes it. It returns null if the container is empty. Syntax: public E poll() Parameters: This method does not accept any parameters. Returns: This method returns front element of the Deque container if

ConcurrentLinkedDeque peek() method in Java with Example

The java.util.ConcurrentLinkedDeque.peek() method in Java is used to retrieve or fetch the element at the head of the Deque. The element retrieved does not get deleted or removed from the Deque instead the method just returns it. If no element is present in the deque then Null is returned. Syntax: A

ConcurrentLinkedDeque addAll() method in Java with Examples

The addAll(Collection col) of ConcurrentLinkedDeque which takes col as a parameter, where col is a Collection of elements (List, ArrayList, LinkedList etc). This entire Collection gets appended or added to the end of the Dequeue. This method just like add() method returns true if the Collection gets

ConcurrentLinkedDeque remove() method in Java with Examples

The java.util.concurrent.ConcurrentLinkedDeque.remove() is an in-built function in Java which is used to remove an element from this deque.Syntax: public E remove() or public boolean remove(Object o) Parameters: The first overload of this method does not accepts any parameter. However the second ove

ConcurrentLinkedDeque equals() method in Java with Example

The equals() method of java.util.ConcurrentLinkedDeque class is used to compare the specified object with this ConcurrentLinkedDeque for equality. Returns true if and only if the specified object is also a ConcurrentLinkedDeque, both ConcurrentLinkedDeques have the same size, and all corresponding p

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