ArrayDeque size() Method in Java
The Java.util.ArrayDeque.size() method in Java is used to get the size of the Deque or the number of elements present in the Deque.
Syntax:
Array_Deque.size()
Parameters: The method does not take any parameter.
Return Value: The method returns the size or the number of elements present in the Deque.
Below programs illustrate the Java.util.ArrayDeque.size() method:
Program 1: Adding String elements into the Deque.
// Java code to illustrate size() import java.util.*; public class ArrayDequeDemo { public static void main(String args[]) { // Creating an empty ArrayDeque Deque<String> de_que = new ArrayDeque<String>(); // Use add() method to add elements into the Deque de_que.add("Welcome"); de_que.add("To"); de_que.add("Beginner"); de_que.add("4"); de_que.add("Beginner"); // Displaying the ArrayDeque System.out.println("ArrayDeque: " + de_que); // Displaying the size of Deque System.out.println("The size is: " + de_que.size()); } } |
Output:
ArrayDeque: [Welcome, To, Beginner, 4, Beginner] The size is: 5
Program 2: Adding Integer elements into the Deque.
// Java code to illustrate clear() import java.util.*; public class ArrayDequeDemo { public static void main(String args[]) { // Creating an empty ArrayDeque Deque<Integer> de_que = new ArrayDeque<Integer>(); // Use add() method to add elements into the Deque de_que.add(10); de_que.add(15); de_que.add(30); // Displaying the ArrayDeque System.out.println("ArrayDeque: " + de_que); // Displaying the size of Deque System.out.println("The size is: " + de_que.size()); } } |
Output:
ArrayDeque: [10, 15, 30] The size is: 3
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