ArrayDeque size() Method in Java
Last Updated :
10 Dec, 2018
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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:
Java
Java
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("Geeks");
de_que.add("4");
de_que.add("Geeks");
// Displaying the ArrayDeque
System.out.println("ArrayDeque: " + de_que);
// Displaying the size of Deque
System.out.println("The size is: " + de_que.size());
}
}
Output:
Program 2: Adding Integer elements into the Deque.
ArrayDeque: [Welcome, To, Geeks, 4, Geeks] The size is: 5
// 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
