类层次

• They provide tested and consistent numerical methods and the class hierarchy represents the wide variety of bayesien filtering algorithms and system models
  它们提供了测试过的一致性的数字方法，用类层次化的方式表示多种贝叶斯过滤算法和系统模型。
• Visitors are often touted as a means of extending the functionality of an existing composite class hierarchy without actually modifying the classes in that hierarchy
  Visitor常常被吹捧为无需实际修改现有复合类层次结构中的类就可扩展其功能的一种方法。
• By agent classifying documents and algorithm category - level structure , the system is able to perform auto - classify . this system creates the pattern of users visiting
  该模型通过文档分类agent调用类层次结构生成算法，实现对搜索到的内容自动分类的功能。
• This is one approach that enables the client to determine what member of the class hierarchy it receives , and process the additional information in the subclass accordingly
  这是一种可以使客户端能确定他接收到的是类层次中的什么成员的方法，并相应处理子类中的附加信息。
• When fields are declared protected , there is the possibility that methods in subclasses will directly access them , effectively increasing the coupling within a class hierarchy
  将字段声明为受保护时，子类中的方法就有可能直接访问它们，这样就可能有效地增加类层次结构中的耦合。
• This example neatly demonstrates how elegantly we can design and implement using objects and classes , even if we have to cope with the idiosyncrasies of foreign libraries and class hierarchies
  这个实例巧妙的展示我们能多么优美的使用对象和类，以及我们必须善于处理外部库和类层次。
• It would save no complexity if instead , you hardwired these tax forms into the program via , say , a class hierarchy of forms with a separate class for each form
  如果不是这样，而将这些税单硬连接到程序中（即，通过表单的类层次结构，其中每个表单有一个单独的类） ，并不会减少复杂性。
• Block is another form of exception swallowing that is harder to detect , and is the result of the questionable structure of the class hierarchy of exceptions in the java class library
  Try . . . catch块是另一种形式的异常淹没，并且更加难以检测，因为这是java类库中的异常类层次的结构而导致的（可疑） 。