When do you use an abstract class and when do you use an interface?
什么时候使用抽象类，什么时候使用接口？
In this case, you can modify just the abstract class and the code will compile.
在这种情况下，您仅需修改抽象类，代码将完成编译。
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。
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。
These are the respective implementations of each abstract class and interface in the message queue framework interface package.
它们分别是消息队列框架接口包中每个抽象类和接口的实现。
If the parent class is an abstract class and if it contains at least one abstract member, then all abstract members will be implemented as non-abstract inheriting classes.
如果父类是抽象类且至少包含一个抽象成员，则所有这些成员都将作为非抽象的继承类实现。
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。
The class provides a series of static and abstract methods to work with one of the two sets of preferences: one for user preferences and one for system preferences.
这个类提供了一系列静态和抽象方法来操作两套首选项(其中一套是用户首选项，另一套是系统首选项)中的其中一套。
Using a glossary model, you can define the name, abbreviation, alternative abbreviation, type (prime or class), if it can be used as a modifier, status, and abstract or description for terms.
通过使用术语表模型，可以定义词汇的名称、缩写、替换的缩写、类型(基本单词或类单词)、它是否可以作为修饰词、状态以及摘要或描述。
Offering both an interface and an abstract class is redundant, but I find it convenient: in most cases, I only need the abstract class, but the interface enables multiple inheritance.
同时提供接口和抽象类是多余的，但我发现这样很方便：在大多数情况下，我只需要抽象类，但接口支持多继承性。
Client classes can be coded to require only the abstract type, leaving the strategies and outcomes of implementation to the concrete class instances passed to them at run time.
客户机类可被编码为只需要抽象类型，而把实现策略和结果留给在运行时传递给它们的具体类实例。
In UML terms, an archetype is nothing but a "stereo-typed" class that further abstract real world entities into truly reusable and easily extensible analysis/design and implementation artifacts.
在UML术语中，原型只不过是一个“定型”的类，它可以进一步将实际实体抽象为真正可重复利用并可轻松扩展的分析/设计和实施构件。
The indirection, which is based on "advanced compilation techniques (like abstract bytecode)" results in one master class and several anonymous, JIT enabled support classes.
该间接产物基于“高级编译技术（类似抽象字节码）”，会产生一个主类和几个匿名类、以及一些启用JIT的支持类。
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。
You can modify an existing class, pass it as a parameter, and take advantage of the API without requiring the base API to declare an abstract class or interface.
您可以修改已有类，将它作为参数传递，并利用API，而不需要基础 API声明一个抽象类或接口。
To handle this, you implement customers as an abstract base class with many different subclasses (for example, financial, manufacturing, and so on).
要处理这个问题，要把客户实现成一个抽象基类，拥有许多不同的子类（例如，财务、制造等等）。
The abstract class ColorModel has the API to translate between color components and primitive red, green, blue, and alpha components.
ColorModel抽象类具有能在颜色组件和基本的红、绿、蓝以及alpha组件之间进行转换的API。
Food order is another abstract class inherited by the three food types actual order classes: Doughnut, Pasty, and IcedBun.
而FoodOrder则是由这三种食品类型实际订单类(Doughnut、Pasty和IcedBun)继承的另一个抽象类。
Just as in the Person mapping file in Listing 2, in Listing 9 we map the abstract class (Right) and all its attributes.
正如清单2所示的Person映射文件，在清单9中，我们映射了抽象类(Right)及其所有属性。
I haven't found any grammar files for the CDT, but we can determine its abstract model elements from the methods in the Parser class and from the comments that precede these methods.
我没找到关于CDT的语法文件，但我们可以根据parser类的方法以及这些方法之前的注释确定其抽象模型元素。
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。
The Template Method pattern defines the skeleton of an algorithm in a base class, using abstract methods and overriding to defer individual details to child classes.
TemplateMethod模式定义了基类算法的骨架，使用了抽象方法和覆盖将具体细节放到子类中。
By extending the abstract class org.restlet.Filter and attaching it to an existing router, it's possible to intercept calls to routers.
通过扩展抽象类org . restlet . Filter并将其附加到一个现有路由器，可以侦听对路由器的调用。
The TypeDescription class is just an abstract base class with methods defined for dealing with three kinds of types: primitives, arrays, and instances of classes.
TypeDescription类只是个抽象基类，其中定义了处理三种类型的方法：原生类型、数组和类实例。
The class itself is also marked as abstract, allowing Tapestry to handle setting up an instance of the class and hook it into the Tapestry engine.
类本身被标记成抽象的，这允许Tapestry负责设置类的实例，并把实例挂接到 Tapestry 引擎。
The Authenticator class is abstract, so you'll need to subclass it and implement the getPasswordAuthentication() method to store the username and password (see Listing 13).
Authenticator是一个抽象类，所以需要从它派生出子类，并实现 getPasswordAuthentication()方法来存储用户名和密码（见清单 13）。
The UML to C++ transformation treats this as an abstract class, and generates code to reflect the same. For example, consider the following model
UML to C++转换的 UML将它看作一个抽象类，并且产生反映相同特性的代码。
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。
For those unfamiliar with themes, the abstract MetalTheme class offers a way to abstract away the colors and fonts used by the look and feel.
如果您不熟悉主题，那么抽象类MetalTheme提供了一个抽象外观使用的颜色和字体的方法。
Declare an inner class, Collab that extends the RuntimeCollaborator abstract class, and implements the operations and attributes declared for the MBean in the MBean Descriptor (Figure 2).
声明内部类Collab,Collab继承了RuntimeCollaborator抽象类并实现了在MBean描述符中为MBean声明的操作和属性(图2)。
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