Stack_By_CF.java

//import java.util.*;
import java.util.Stack;
public class Stack_By_CF
{
    public static void main(String args[])
    {
        Stack<Integer> s =new Stack<>();
        s.push(1);
        s.push(2);
        s.push(3);
        s.push(4);
        while(!s.isEmpty())
        {
            System.out.print(s.peek());
            s.pop();
        }
    }
}