public class MainClass { public static void main(String[] args) {
StackL stack = new StackL(); for (int i = 0; i < 10; i++)
stack.push(i);
System.out.println(stack.top());
System.out.println(stack.top());
System.out.println(stack.pop());
System.out.println(stack.pop());
System.out.println(stack.pop());
}
}
class StackL {
private LinkedList list = new LinkedList();
public void push(Object v) {
list.addFirst(v);
}
public Object top() { return list.getFirst();
}
public Object pop() { return list.removeFirst();
}
}