抽象类的运用,举了一个很典型的例子，希望能给大家有所启发-The use of abstract class, gave a typical example of hope that they can inspire

这是运用到Java中的Applet编写的一个图形编辑器软件，设计模式的思想比较突出。利于面向对象的初学实践。这是UML实践(第一版)中的例子-Applet in Java can be used to learn Object-Oriented programming.

该系统主要是实现网上订餐系统，主要运用的技术jsp/servlet和javabean，例子不大，可以借鉴和参考-The system is mainly to achieve the online ordering system, the main use of the jsp/servlet and javabean, examples, can learn from and reference