(6)An abstract class cannot be instantiated.It represents a concept on which other classes can build their definitions (7)A class derived from an abstract parent must override all of its parent's abstract methods,or the derived class will also be considered abstract. (8)Inheritance can be applied to interfaces so that one interface can be derived from another. (9)Private members are inherited by the child class,but cannot be referenced directly by name.They may be used indirectly. however. (10)Software design must carefully and specifically address inheritance. (11)The final modifier can be used to restrict inheritance. 3.问题与应用（能力要求） (1)0 bject类的使用规则： (2)抽象类在什么情况下使用？ (3)接口的继承和类的继承有什么区别？ 融入点：谈谈党和国家机构职能体系，讲解类的继承结构， 第四节The Component class Hierarchy 1.主要内容 The component class hierarchy 2.基本概念和知识点 IComponnet.AWT.Swing 3.问题与应用（能力要求 堂握Gi界面中组件的继承层次 (三)思考与实践 (1)Iava中如何实现多重继承？ (②)类继承和接口继承的区别？适用的场合？ (3)充分理解继承的概念，在Gui界面设计中应用继承的思想，实现结构 合理的代码。 (四)教学方法与手段 以课堂讲授为主。 (一)目的与要求 1.Define polymorphism and explore its benefits 24 24 (6) An abstract class cannot be instantiated. It represents a concept on which other classes can build their definitions. (7) A class derived from an abstract parent must override all of its parent’s abstract methods, or the derived class will also be considered abstract. (8) Inheritance can be applied to interfaces so that one interface can be derived from another. (9) Private members are inherited by the child class, but cannot be referenced directly by name. They may be used indirectly, however. (10) Software design must carefully and specifically address inheritance. (11) The final modifier can be used to restrict inheritance. 3．问题与应用（能力要求） (1) Object 类的使用规则； (2) 抽象类在什么情况下使用？ (3) 接口的继承和类的继承有什么区别？ 融入点：谈谈党和国家机构职能体系，讲解类的继承结构。 第四节 The Component class Hierarchy 1．主要内容 The component class hierarchy 2．基本概念和知识点 JComponnet,AWT,Swing 3．问题与应用（能力要求） 掌握 Gui 界面中组件的继承层次 （三）思考与实践 (1) Java 中如何实现多重继承？ (2) 类继承和接口继承的区别？适用的场合？ (3) 充分理解继承的概念，在 Gui 界面设计中应用继承的思想，实现结构 合理的代码。 （四）教学方法与手段 以课堂讲授为主。 第九章 Polymorphism （一）目的与要求 1．Define polymorphism and explore its benefits