ArrayDeque - used like a Stack

import java.util.*;
class ArrayDequeDemo
{
public static void main(String args[])
{
//create ArrayDeque
ArrayDeque<String> adq=new ArrayDeque<String>();

//using ArrayDeque like stack.
adq.push("A");
adq.push("B");
adq.push("D");
adq.push("E");
adq.push("C");
adq.push("F");
System.out.println(adq);

//Popping the elements from ArrayDeque
System.out.println("Popping the stack");
while(adq.peek()!=null)  //  returns null if this deque is empty.
{
System.out.println(adq.pop() +"- popped ");
}
System.out.println(adq);
}

}

Output:
[F, C, E, D, B, A]
Popping the stack
F- popped
C- popped
E- popped
D- popped
B- popped
A- popped
[]

Note:

• ArrayDeque implements Deque