import java.util.*;

public class StackExample2 {

    public static void main (String[] argv)
    {
        Stack<Integer> numberStack = new Stack<Integer> ();

        // Push some numbers
	numberStack.push (1);
	numberStack.push (2);
	numberStack.push (3);
        
        // Print in reverse order by popping off the stack.
        while (! numberStack.isEmpty() ) {
            System.out.println (numberStack.pop());
        }
    }
    
}