3.问题与应用（能力要求） 理解三种类关系，能够在应用实例中识别三种关系。 融入点：社会是由关系构成的，程序世界是对现实世界的模拟，在此谈一 下中国特色大国外交政策，引导学生由国际关系，思考类关系。 第四节Static class members and this reference 1.主要内容 (1)Static variables (2)Static methods (3)This reference 2.基本概念和知识点 (1)A static variable is shared among all instances of a class. (2)this allows an object to refer to itself. 3.问题与应用（能力要求） (I)理解什么场合使用static和this: (2)能够读使用static和this关键字的程序，写出程序运行结果 第五节Interfaces 1.主要内容 (1)The basic concepts of interface (2)How to define an interface (3)How to use an interface (4)The comparable interface (5)The iterator interface 2.基本概念和知识点 (1)An interface is a collection of abstract methods and therefore cannot be instantiated. (2)An abstract method is a method that does not have an implementation (3)Methods in interfaces have public visibility by default. (4)A class implements an interface by providing method implementations for each of the abstract methods defined in the interface (5)If a class asserts that it implements a particular interface, it must provide a definition for all methods in the interface. 3.问题与应用（能力要求） (1)学会定义和使用接口： 18 18 3．问题与应用（能力要求） 理解三种类关系，能够在应用实例中识别三种关系。 融入点：社会是由关系构成的，程序世界是对现实世界的模拟，在此谈一 下中国特色大国外交政策，引导学生由国际关系，思考类关系。 第四节 Static class members and this reference 1．主要内容 (1) Static variables (2) Static methods (3) This reference 2．基本概念和知识点 (1) A static variable is shared among all instances of a class. (2) this allows an object to refer to itself. 3．问题与应用（能力要求） (1) 理解什么场合使用 static 和 this； (2) 能够读使用 static 和 this 关键字的程序，写出程序运行结果 第五节 Interfaces 1．主要内容 (1) The basic concepts of interface (2) How to define an interface (3) How to use an interface (4) The comparable interface (5) The iterator interface 2．基本概念和知识点 (1) An interface is a collection of abstract methods and therefore cannot be instantiated. (2) An abstract method is a method that does not have an implementation. (3) Methods in interfaces have public visibility by default. (4) A class implements an interface by providing method implementations for each of the abstract methods defined in the interface (5) If a class asserts that it implements a particular interface, it must provide a definition for all methods in the interface. 3．问题与应用（能力要求） (1) 学会定义和使用接口；