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Java ArrayDeque add() Method with Example

ArrayDeque Class add() method: Here, we are going to learn about the add() method of ArrayDeque Class with its syntax and example.
Submitted by Preeti Jain, on January 08, 2020

ArrayDeque Class add() method

  • add() Method is available in java.lang package.
  • add() Method is used to add the given element at the end of the deque.
  • add() Method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
  • add() Method may throw an exception at the time of inserting an element in the deque.
    NullPointerException: This exception may throw when the given element is null exists.


    public boolean add(T element);


  • T element – represents the element to be inserted in the deque.

Return value:

The return type of the method is boolean, it returns true if element added successfully, else it returns false.


// Java program to demonstrate the example 
// of boolean add(T element) method of ArrayDeque 

import java.util.*;

public class AddOfArrayDeque {
    public static void main(String[] args) {
        // Creating an ArrayDeque with initial capacity of
        // storing elements
        Deque < String > d_queue = new ArrayDeque < String > (10);

        // By using add() method to add elements
        // in ArrayDeque

        // Display ArrayDeque Elements
        System.out.println("ArrayDeque Elements = " + d_queue);


ArrayDeque Elements = [C, C++, Java, Php, DotNet]

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