1、熟练掌握类、对象的的概念。

2、熟练掌握成员、方法的概念以及构造方法的概念。

3、熟练掌握封装性，多态性的概念。

4、理解面向对象的程序设计方法。

-a skilled master category, the concept of the object. 2, has mastered members, the concept and structure of the concept. 3, has mastered encapsulation, polymorphism concept. 4, understand object-oriented programming design method.