stack_queue_inbuilt.java

import java.util.*;
import java.util.Queue;

public class stack_queue_inbuilt {

        public static void main(String[] args) {
            Stack<Integer> stack = new Stack<>();
            stack.push(34);
            stack.push(45);
            stack.push(2);
            stack.push(9);
            stack.push(18);

            System.out.println(stack.pop());
            System.out.println(stack.pop());
            System.out.println(stack.pop());
            System.out.println(stack.pop());
            System.out.println(stack.pop());
            System.out.println(stack.pop());

            Queue<Integer> queue = new LinkedList<>();
            queue.add(3);
            queue.add(6);
            queue.add(5);
            queue.add(19);
            queue.add(1);

            System.out.println(queue.remove());
            System.out.println(queue.remove());

            Deque<Integer> deque = new ArrayDeque<>();
            deque.add(89);
            deque.addLast(78);
            deque.removeFirst();

        }
    }