However, you may inherit from an abstract class.
然而，你可以继承一个抽象类。
Things get a little trickier when we query an abstract class.
当我们查询抽象类时，事情变得有些复杂。
Because having an abstract method makes it an abstract class.
因为有一个抽象方法使得一个抽象类。
Well, an abstract class can have functions that are implemented.
抽象类中的函数可以有具体实现。
Suppose you have an abstract class Vehicle, defined as follows in Listing 5.
假设您有一个名为vehicle的抽象类，其定义如清单5所示。
It provides an abstract class which must be subclassed to create portlets.
它提供了抽象子类来创建portlet。
Why am I receiving an Abstract Class error when I press the Applet button?
为什么我收到一个抽象类的错误我按下按钮时的程序？
An abstract class that represents the location where index files are stored.
表示索引文件存储位置的抽象类。
Well, an abstract class can have non-static variables, and an interface can't.
抽象类可以有非静态变量，而接口不可以有。
Notice that an abstract class is denoted by italicized text, as are abstract methods.
注意，抽象类和抽象方法用斜体表示。
In fact, an abstract class gives you more flexibility when it comes to evolution.
实际上，抽象类在具体实现时提供了更好的灵活性。
Create an abstract class named BP3Form by extending org.apache.struts.action.ActionForm.
通过扩展org . apache . struts. action . ActionForm创建一个名为BP3Form的抽象类。
You can declare standard and abstract methods in an abstract class, as shown in Listing 5.
可以在抽象类中声明标准和抽象方法，如清单5所示。
Because having an abstract method makes it an abstract class. The reasoning is circular.
因为有一个抽象方法使得一个抽象类。推理是圆形的。
In this case, we use an abstract class to define the service specification, as shown in Figure 5.
在这种情况下，我们使用一个抽象类来定义服务规范，如图5所示。
The top level object is the Order, an abstract class that is inherited by FoodOrder and BoxOrder.
顶层对象是Order，是FoodOrder和BoxOrder继承的一个抽象类。
However, unlike an abstract class, a mixin does not try to contain the framework for a child.
然而，与抽象类不同的是，mixin并不试图包括子类的框架。
ValidationRule is an abstract class for a rule engine used to validate and format ViewController field content.
ValidationRule是规则引擎的抽象类，用来验证并格式化ViewController字段内容。
Figure 3 presents the SQL Model table objects, where table is an abstract class and can have one to many columns.
图3显示了SQLmodel表对象，其中Table是一个抽象类，它可以有1到多个列，或者0到多个用户定义类型。
A FieldEditor is an abstract class that represents a value that can be modified by a user from a Preferences page.
FieldEditor是一个抽象类，表示用户可以在Preferences页面修改的值。
This indicates that the BankAccount class is an abstract class and the withdrawal method is an abstract operation.
这表示，BankAccount类是一个抽象类，而withdrawal方法是抽象的操作。
BaseBridge, an abstract class, will contain all of the methods that you could conceivably implement in your connector.
BaseBridge是一个抽象类，包含在连接器中可能要实现的所有方法。
In the later framework, MD5 is defined as an abstract class which can be extended, but its implementation is not trivial.
在Silverlight 2的框架中，MD 5被定义为抽象类，可对其进行扩展，但实现起来非常繁琐。
Binding is now an abstract class representing a binding between two Property instances (typically associated with two objects).
Binding目前已经成为一个表示两个Property实例之间绑定关系的抽象类(通常关联着两个对象)。
To simplify coding, I have provided an abstract class DefaultMoverImpl, available through the source repository (see Resources).
要简化编码，我已经提供了一个抽象类defaultmoverimpl，可以在源码库中找到这个类(请参阅参考资料)。
A class that implements an interface must implement all of the methods described in the interface, or be an abstract class.
一个类，它要么实现接口中描述的所有方法(然后这就是常见类)，要么这个类实现接口中的一部分方法，然后这个类被标记成抽象类。
A child class that extends an abstract class must implement all abstract methods in its parent or itself be declared abstract.
继承抽象类的子类必须实现在其父类或自身中声明为抽象的所有抽象方法。
The change to each IPresenter implementation could be alleviated by using an abstract class called Presenter instead of an interface.
通过使用一个名为Presenter的抽象类，而不是使用一个接口将会减少修改每个IPresenter接口的实现的痛苦。
In this case, we use an abstract class to define the service interface and operations of the exposed capabilities, as shown in Figure 3.
在这种情况下，我们使用一个抽象的类，来定义服务接口以及预期功能的操作，如图3所示。
Field is an abstract class that defines methods to contain various UI controls, along with associated IDs to identify those controls globally.
Field是一个抽象类，它定义了包含各种用户界面控件的方法，还有全局地识别这些控件的相关ID。
应用推荐