使用LinkedList模拟一个堆栈或者队列数据结构

import java.util.LinkedList;

public class DuiLie {

    private LinkedList link;

    public DuiLie() {
        link = new LinkedList();
    }

    public void myAdd(Object obj) {
        link.addFirst(obj);
    }

    public Object myGet() {
        // return link.removeLast();//队列
        return link.removeFirst();// 堆栈
    }

    public boolean isNull() {
        return link.isEmpty();
    }
}

import java.util.LinkedList;

public class DuiLie {

    private LinkedList link;

    public DuiLie() {
        link = new LinkedList();
    }

    public void myAdd(Object obj) {
        link.addFirst(obj);
    }

    public Object myGet() {
         return link.removeLast();//队列
        //return link.removeFirst();// 堆栈
    }

    public boolean isNull() {
        return link.isEmpty();
    }
}