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| public class LinkedStack<T> { | |
| private static class Node<U> { | |
| U item; | |
| Node<U> next; | |
| Node(){ | |
| item = null; | |
| next = null; | |
| } | |
| Node(U item, Node<U> next){ | |
| this.item = item; | |
| this.next = next; | |
| } | |
| boolean end(){ | |
| return item == null && next == null; | |
| } | |
| private Node<T> top = new Node<T>(); | |
| public T pop(){ | |
| T result = top.item; | |
| if(!top.end()){ | |
| top = top.next; | |
| } | |
| return result; | |
| } | |
| public void push(T item){ | |
| top = new Node<T>(item, top); | |
| } | |
| } | |
| } |
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