java实现泛型栈

package com.test.common;

public class LinkedStack<T> {

	private 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 void push(T item)
	{
		top=new Node<T>(item,top);
	}
	public T pop()
	{
		T result=top.item;
		if(!top.end())
		{
			top=top.next;
		}
		return result;
	}
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		LinkedStack<String> stack=new LinkedStack<String>();
		stack.push("jianghuiwen");
		stack.push("wangjun");

		System.out.println(stack.pop());
	}

}

代码如上所示，创建了一个泛型的栈，并且提供pop和push两种操作方法。输出结果如图