MyStack.java

package com.learncsdesign;

import java.util.Stack;

public class MyStack {

	public static void main(String[] args) {
		Stack<String> animals = new Stack<>();
		// LIFO
		animals.push("Elephant");
		animals.push("Lion");
		animals.push("Tiger");
		
		System.out.println("Size: " + animals.size());
		System.out.println("Peek Element: " + animals.peek());
		System.out.println("Size: " + animals.size());
		System.out.println("Pop Element: " + animals.pop());
		System.out.println("Size: " + animals.size());
		
		while(!animals.isEmpty()) {
			System.out.println(animals.pop());
		}

	}

}