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Update 10-Interfaces.md #566

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2 changes: 1 addition & 1 deletion docs/book/10-Interfaces.md
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Expand Up @@ -780,7 +780,7 @@ Woodwind.play() MIDDLE_C

当方法操纵的是一个类而非接口时，它就只能作用于那个类或其子类。如果想把方法应用于那个继承层级结构之外的类，就会触霉头。接口在很大程度上放宽了这个限制，因而使用接口可以编写复用性更好的代码。

例如有一个类 **Process** 有两个方法 `name()` 和 `process()`。`process()` 方法接受输入，修改并输出。把这个类作为基类用来创建各种不同类型的 **Processor**。下例中，**Processor** 的各个子类修改 String 对象（注意，返回类型可能是协变类型而非参数类型）：
例如有一个类 **Processor** 有两个方法 `name()` 和 `process()`。`process()` 方法接受输入，修改并输出。把这个类作为基类用来创建各种不同类型的 **Processor**。下例中，**Processor** 的各个子类修改 String 对象（注意，返回类型可能是协变类型而非参数类型）：

```java
// interfaces/Applicator.java
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