java数据结构-栈的底层实现：数组实现压入，弹出，判断空栈测试代码

package com.stack;/** * @auther 付强 * @date 2020/2/13 - 13:08 */public class TestMystack {    public static void main(String[] args) {        //先创建一个栈        Mystack mystack = new Mystack();        //压入数据        mystack.push(9);        mystack.push(8);        mystack.push(7);        mystack.push(6);        mystack.push(5);        System.out.println(mystack.pick());        System.out.println(mystack.pop());        System.out.println(mystack.pop());        System.out.println(mystack.pop());        System.out.println(mystack.pick());        System.out.println(mystack.isEmpty());    }}