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Java ArrayDeque size() Method with Example

ArrayDeque Class size() method: Here, we are going to learn about the size() method of ArrayDeque Class with its syntax and example.
Submitted by Preeti Jain, on January 17, 2020

ArrayDeque Class size() method

• size() method is available in java.lang package.
• size() method is used to return the size (No. of elements) stored in this deque.
• size() 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.
• size() method does not throw an exception at the time of returning the size of this deque.

Syntax:

    public int size();

Parameter(s):

• It does not accept any parameter.

Return value:

The return type of this method is int, it returns the number of elements in this deque.

Example:

// Java program to demonstrate the example 
// of int size() method of ArrayDeque 

import java.util.*;

public class SizeOfArrayDeque {
    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
        d_queue.add("C");
        d_queue.add("C++");
        d_queue.add("Java");
        d_queue.add("Php");
        d_queue.add("DotNet");

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

        // By using size() method is to return the size
        // of the ArrayDeque
        int size = d_queue.size();

        System.out.println();
        System.out.println("d_queue.size() = " + size);
    }
}

Output

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

d_queue.size() = 5