package collections.linkedlist;
import java.util.LinkedList;
public class Stack {
private static LinkedList list = new LinkedList();
public static void main(String[] args) {
Stack stack = new Stack();
stack.push("good");
stack.push("bad");
stack.push("ugly");
System.out.println(stack.peek());
System.out.println(stack.pop());
System.out.println(stack.pop());
System.out.println(stack.pop());
}
public void push(Object o) {
list.addFirst(o);
}
public Object pop() {
return list.removeFirst();
}
public Object peek() {
return list.getFirst();
}
}