【适配器模式】将一个类的接口，转换成客户期望的另外一个接口。适配器让原本接口不兼容的类可以合作无间。

1，Duck接口

package com.pattern.adapter;public interface Duck {public void quack();public void fly();}

2，Duck实现类

package com.pattern.adapter;public class MallardDuck implements Duck{/** * @see com.pattern.adapter.Duck#quack()*/@Overridepublic void quack() {System.out.println("Quack");}/** * @see com.pattern.adapter.Duck#fly()*/@Overridepublic void fly() {System.out.println("I'm flying");}}

3，Turkey接口

package com.pattern.adapter;public interface Turkey {public void gobble();public void fly();}

4，Turkey实现类

package com.pattern.adapter;public class WildTurkey implements Turkey{/** * @see com.pattern.adapter.Turkey#gobble()*/@Overridepublic void gobble() {System.out.println("Gobble gobble");}/** * @see com.pattern.adapter.Turkey#fly()*/@Overridepublic void fly() {System.out.println("I'm flying a short distance");}}

5，适配器类

package com.pattern.adapter;public class TurkeyAdapter implements Duck{Turkey turkey;public TurkeyAdapter(Turkey turkey){this.turkey = turkey;}/** * @see com.pattern.adapter.Duck#quack()*/@Overridepublic void quack() {turkey.gobble();}/** * @see com.pattern.adapter.Duck#fly()*/@Overridepublic void fly() {for(int i=0;i<5;i++){turkey.fly();}}}

6，测试类

package com.pattern.adapter;public class DuckTestDrive {public static void main(String[] args) {MallardDuck duck = new MallardDuck();WildTurkey turkey = new WildTurkey();Duck turkeyAdapter = new TurkeyAdapter(turkey);System.out.println("The Turkey says....");turkey.gobble();turkey.fly();System.out.println("\n The Duck says...");testDuck(duck);System.out.println("\n TurkeyAdapter says...");testDuck(turkeyAdapter);}static void testDuck(Duck duck){duck.quack();duck.fly();}
}

输出结果为：

The Turkey says....
Gobble gobble
I'm flying a short distance

The Duck says...
Quack
I'm flying

TurkeyAdapter says...
Gobble gobble
I'm flying a short distance
I'm flying a short distance
I'm flying a short distance
I'm flying a short distance
I'm flying a short distance

类图为：