Java Stack pop() method

Java Stack pop() method removes the object at the top of this stack and returns that object as the value of this function.

/**
 * @author lautturi.com 
 * Java example:  Stack pop() method
 */

import java.util.*;
import java.util.regex.Pattern;

public class Lautturi {
	public static void main(String[] args){
		
		Stack<Character> stack = new Stack<Character>();
		
		stack.push('A');
		stack.push('B');
		stack.push('C');
		stack.push('D');

		System.out.println(stack);
		Character ch = stack.pop();
        System.out.println("Element at top: " + ch);
        System.out.println(stack);
		
	}
}

output:

Stack:[A, B, C, D]
Element at top: D
Stack now:[A, B, C]