August 2021
Intermediate to advanced
450 pages
4h 46m
Chinese
Content preview from 面向对象的思考过程（原书第5版）
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8.4.4 UML对象模型
最新创建的Shop类是提取出来的功能。注意图8.7中的getInventory()和buyInventory()方法在体系树中从DonutShop和PizzaShop中移动到了抽象类Shop中。现在无论何时想提供一个新的定制化的Shop版本，我们只需加入Shop类的新实现（比如杂货店）。Shop类是实现必须遵守的契约。
Shop类有一个客户列表来展示组合如何适应这种情况。因此类CustList被包含在Shop类中。
图8.7 Shop模型的UML图
我们定义了一个名为Nameable的接口来演示接口的使用：
我们潜在拥有大量不同的实现，但（该程序中）其余的代码是相同的。在这个小例子中，似乎没节省多少代码。但在大型的现实的应用程序中，节省的代码是巨大的。我们来看看甜甜圈店的实现： ...
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