- A.工厂方法
- B.策略
- C.抽象工厂
- D.观察者
正确答案及解析
正确答案
解析
本题考查面向对象方法中的设计模式知识。
题中的类图是抽象工厂设计模式，该设计模式的意图是提供一个创建一系列相关或相互依赖对象的接口，而无需指定它们具体的类。使用抽象工厂设计模式的常见情形是：一个系统要独立于其产品的创建、组合和表示时；一个系统要由多个产品系列中的一个来配置时；当需要强调一系列相关的产品对象的设计以便进行联合使用时；当提供一个产品类库，而只想显示它们的接口不是实现时。对于希望使用已经存在的类，但其接口不符合需求的情形，应当考虑适配器设计模式。
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