If it cannot find a designer in the class hierarchy , it returns a null reference nothing in visual basic 如果未能在类层次结构中找到设计器，它返回空引用（在visual basic中为nothing ） 。
The data source configuration wizard displays a list of existing classes in the project . expand the class hierarchy under 在businessobjects下展开类的层次结构，直到在列表中看到product 。
Writing groovlets is indubitably simple , since groovy poses few requirements in terms of class hierarchy extensions 编写groovlet无疑很简单，因为groovy只有很少的几个对类继承扩展的要求。
Constructor is then called for each class in the class hierarchy until the constructor for the base class is reached 调用类层次结构中该类本身上面相邻类的构造函数。然后调用该类层次结构中每个类的
They support all oop principles , including class hierarchies , inheritance , multiple inheritance , encapsulation , abstraction , and polymorphism 它们支持所有oop原理，包括类继承、继承、多重继承、封装、抽象和多态。
Derived classes inherit members from the class they are based on , allowing you to add complexity as you progress in a class hierarchy 类派生的。派生类从其所基于的类继承成员，允许随着类层次结构的进展添加复杂性。
Specifies the type of action that occurs in the xml web service at the level of the class hierarchy to which this enumeration is applied 指定xml web services中，在该枚举所应用于的类层次结构级别发生的操作的类型。
A class document includes the class hierarchy , a description of the class , a list of member variables , a list of constructors , and so on 一个类别文件包含了类别阶层，该类别的描述，成员变数的列表，建构子的列表，等等。
Industry groups tend to invest a lot in the class hierarchy , and try to enforce markup reuse where an element is reused in different contexts 工业组织往往在类层次结构方面大量投资，努力实现标记的重用（在不同的上下文中重用元素） 。
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。
