如何用单向链表实现栈？

package com.ys.datastructure;

public class StackSingleLink { private SingleLinkedList link;

public StackSingleLink(){
    link = new SingleLinkedList();
}

//添加元素
public void push(Object obj){
    link.addHead(obj);
}

//移除栈顶元素
public Object pop(){
    Object obj = link.deleteHead();
    return obj;
}

//判断是否为空
public boolean isEmpty(){
    return link.isEmpty();
}

//打印栈内元素信息
public void display(){
    link.display();
}

}