Java.util.ArrayDeque.size() Method


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Description

The java.util.ArrayDeque.size() method returns the number of elements in this deque.

Declaration

Following is the declaration for java.util.ArrayDeque.size() method

public int size()

Parameters

NA

Return Value

This method returns the number of elements in this deque.

Exception

NA

Example

The following example shows the usage of java.util.ArrayDeque.size() method.

Live Demo
package com.tutorialspoint;

import java.util.ArrayDeque;
import java.util.Deque;

public class ArrayDequeDemo {
   public static void main(String[] args) {
      
      // create an empty array deque with an initial capacity
      Deque<Integer> deque = new ArrayDeque<Integer>(8);

      // use add() method to add elements in the deque
      deque.add(15);
      deque.add(20);
      deque.add(25);
      deque.add(22);

      // let us print all the elements available in deque
      for (Integer number : deque) {
         System.out.println("Number = " + number);
      }

      // this will print the size of this deque
      int retval = deque.size();
      System.out.println("Size of deque = " + retval); 
   }
}

Let us compile and run the above program, this will produce the following result −

Number = 15
Number = 20
Number = 25
Number = 22
Size of deque = 4

java_util_arraydeque.htm

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