答案

创建四个类，分别为Employee类、SalariedEmplyee类、HourlyEmployee类和CommissionEmployee类。其中Employee类是其他三个类的父类。Employee类包含姓名和身份证号。除此之外，SalariedEmployee类还应包含每月工资；HourlyEmployee类还应包含每小时工资数和工作时间数；CommissionEmployee还应包含提成比例和销售总额。每个类都应有合适的构造方法、数据成员的设置和读取方法。编写一个应用程序，创建这些类的对象，并输出与对象相关的信息。注意子类有时需调用父类的构造方法和被覆盖的方法，成员变量定义为private,对有些方法实现重载。 (Create four categories, namely the Employee class, SalariedEmplyee class, HourlyEmployee classes and CommissionEmployee classes. Employee class is the parent class where the other three classes. Employee class contains the name and ID number. In addition, SalariedEmployee class also includes a monthly salary HourlyEmployee class should also include the number of hourly wages and the number of working hours CommissionEmployee should also include the proportion and total sales commission. Each class should have the right to set and read the constructor method, data members. Write an application to create objects of these classes, and output information associated with the object. Sometimes need to call attention to a subclass of the parent class constructor and methods are covered, member variables defined as private, to achieve overloading of some methods.)

beyond java programming

关于SOCKET的单用户，以及多用户多线程问题，java，是老师给的范例(About SOCKET single-user, as well as multi-user multi-threaded issues, java, is a teacher gave an example of)

说明：  调用h2数据库管理用户注册，实现网上书城，购物车管理等功能(Call H2 database to manage user registration, realize online bookstore, shopping cart management and other functions)

以及在 mysql 数据库中索引的工作机制是什么？ 有哪些数据库优化方面的经验? 数据库三范式是什么? 各大厂数据库面试热门考题

QuestionDB 是一个用来在数据库中存储试卷问题的程序，支持五种不同类型的问题：开放问题、多部分的开放问题、填充题、多选题和是非题。你可导出问题到 OpenDocument 文本格式。(QuestionDB is used to support the five different types of questions: open, multi-part open questions, Fill in the blanks, multiple choice and true or false question in the papers the problem of database stored procedures. You can export to OpenDocument text format.)

说明：  自己系统开发，用与学习和后面项目的开发，主要集成springboot(Develop your own system, use and learn, and develop later projects, mainly inherit spring boot)

说明：  Module for Microchip TCP/IP Stack

是一个tomcat组件，该组件用于tomcat的配置(This file is a website certificate)

A connection sub-pool for a specific route, used by {@link ConnPoolByRoute}. The methods in this class are unsynchronized. It is expected that the containing pool takes care of synchronization.