【Java学习笔记】<集合框架>使用LinkedList来模拟一个堆栈或者队列的数据结构

import java.util.LinkedList;

public class Test5 {

    public static void main(String[] args) {
        
        Duilie dl = new Duilie();
        
        dl.myAdd("abc1");
        dl.myAdd("abc2");
        dl.myAdd("abc3");
        dl.myAdd("abc4");
        
        while (!dl.isNull())
        {
            System.out.println(dl.myGet());
        }

    }

}

class Duilie{
    private LinkedList link;
    
    public Duilie(){
        link = new LinkedList();
    }
    
    public void myAdd(Object obj)
    {
        link.addLast(obj);
    }
    
    public Object myGet()
    {
//        return link.removeFirst();//模拟队列
        return link.removeLast();   //模拟堆栈
    }
    
    public boolean isNull()
    {
        return link.isEmpty();
    }
}