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Java ArrayDeque offerLast() Method with Example

ArrayDeque Class offerLast() method: Here, we are going to learn about the offerLast() method of ArrayDeque Class with its syntax and example.
Submitted by Preeti Jain, on January 10, 2020

ArrayDeque Class offerLast() method

  • offerLast() Method is available in java.lang package.
  • offerLast() Method is used to add the given element at the last of this deque.
  • offerLast() 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.
  • offerLast() Method may throw an exception at the time of adding element in the deque.
    NullPointerException: This exception may throw when the given element is null exists.


    public boolean offerLast(T element);


  • T element – represents the element to be inserted at the last position of this deque.

Return value:

The return type of the method is boolean, it returns true if the given element is added at the end of this deque successfully, else it returns false.


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

import java.util.*;

public class OfferLastOfArrayDeque {
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 Deque Elements
System.out.println("d_queue before offerLast(): ");
System.out.println("ArrayDeque Elements = " + d_queue);


// By using offerLast() method to add the
// elements at the last in ArrayDeque


// Display Deque Elements
System.out.println("d_queue after offerLast(): ");
System.out.println("d_queue.offerLast() : "+ d_queue);


d_queue before offerLast(): 
ArrayDeque Elements = [C, C++, Java, Php, DotNet]

d_queue after offerLast(): 
d_queue.offerLast() : [C, C++, Java, Php, DotNet, Python]

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