CS-Notes/notes/设计模式 - 适配器.md

## 1. 适配器（Adapter）

### Intent

把一个类接口转换成另一个用户需要的接口。

<div align="center"> <img src="pics/3d5b828e-5c4d-48d8-a440-281e4a8e1c92.png"/> </div><br>

### Class Diagram

<div align="center"> <img src="pics/ff5152fc-4ff3-44c4-95d6-1061002c364a.png"/> </div><br>

### Implementation

鸭子（Duck）和火鸡（Turkey）拥有不同的叫声，Duck 的叫声调用 quack() 方法，而 Turkey 调用 gobble() 方法。

要求将 Turkey 的 gobble() 方法适配成 Duck 的 quack() 方法，从而让火鸡冒充鸭子！

```java
public interface Duck {
    void quack();
}
```

```java
public interface Turkey {
    void gobble();
}
```

```java
public class WildTurkey implements Turkey {
    @Override
    public void gobble() {
        System.out.println("gobble!");
    }
}
```

```java
public class TurkeyAdapter implements Duck {
    Turkey turkey;

    public TurkeyAdapter(Turkey turkey) {
        this.turkey = turkey;
    }

    @Override
    public void quack() {
        turkey.gobble();
    }
}
```

```java
public class Client {
    public static void main(String[] args) {
        Turkey turkey = new WildTurkey();
        Duck duck = new TurkeyAdapter(turkey);
        duck.quack();
    }
}
```

### JDK

- [java.util.Arrays#asList()](http://docs.oracle.com/javase/8/docs/api/java/util/Arrays.html#asList%28T...%29)
- [java.util.Collections#list()](https://docs.oracle.com/javase/8/docs/api/java/util/Collections.html#list-java.util.Enumeration-)
- [java.util.Collections#enumeration()](https://docs.oracle.com/javase/8/docs/api/java/util/Collections.html#enumeration-java.util.Collection-)
- [javax.xml.bind.annotation.adapters.XMLAdapter](http://docs.oracle.com/javase/8/docs/api/javax/xml/bind/annotation/adapters/XmlAdapter.html#marshal-BoundType-)






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