初识对象和类

4.2 对象的生命周期

4.3 创建类

4.4 包的创建和使用

4.5 类成员的访问控制

4.6 类成员与实例成员

4.7 继承

4.8 嵌入类 Inner Classes

4.9 接口

-Acquaintance-type 4.2 objects and object types of the life cycle of 4.3 to create 4.4 package to create and use 4.5 of the Access Control category of the members of Class 4.6 members and 4.7 members of the succession of examples of types of embedded 4.8 interface Inner Classes 4.9