package com.shrimpking.t11;

import java.util.LinkedList;

/**
 * Created by IntelliJ IDEA.
 *
 * @Author : Shrimpking
 * @create 2024/9/10 11:49
 */
public class MyStack<E>
{
    private LinkedList<E> list = new LinkedList<>();

    //出栈
    public E pop(){
        return list.removeLast();
    }

    //压栈
    public void push(E obj){
        list.addLast(obj);
    }

    //是否有元素
    public boolean empty(){
        return list.isEmpty();
    }

    //查看元素，但不删除
    public E peek(){
        return list.getLast();
    }



}
package com.shrimpking.t11;

/**
 * Created by IntelliJ IDEA.
 *
 * @Author : Shrimpking
 * @create 2024/9/10 11:53
 */
public class StackTest
{
    public static void main(String[] args)
    {
        MyStack<String> ms = new MyStack<>();
        ms.push("one");
        ms.push("two");
        ms.push("three");

        System.out.println(ms.pop());
        System.out.println(ms.peek());
        System.out.println(ms.pop());

        if(ms.empty()){
            System.out.println("栈为空");
        }else {
            System.out.println("栈不为空");
        }

    }
}