曾强版串口通讯，应用多态性质，更适合作为串口通讯的基类，取消窗口依赖和消息依赖-Has strong version of the serial communications, the application of polymorphism in the quality, it is more suitable as a base class for serial communication, the abolition of window-dependent and rely on the i

java多态培训的例子，使用运行时多态作为例子给大家讲解。-Examples of multi-state training in java, using run-time polymorphism as an example to explain.