 1 /**
 2  * 鸭子接口
 3  * @ClassName: Duck
 4  * TODO
 5  * @author Xingle
 6  * @date 2014-10-9 下午3:33:04
 7  */
 8 public interface Duck {
 9     
10     public void quack();
11     public void fly();
12 
13 }

绿头鸭是鸭子的子类：

 1 /**
 2  * 绿头鸭 
 3  * @ClassName: MallardDuck
 4  * @author Xingle
 5  * @date 2014-10-9 下午3:38:54
 6  */
 7 public class MallardDuck implements Duck{
 8 
 9     @Override
10     public void quack() {
11         System.out.println("Quack");
12     }
13 
14     @Override
15     public void fly() {
16         System.out.println("I'm flying.");
17     }
18 
19 }

最新的“接头顽禽”——火鸡

 1 /**
 2  * 火鸡
 3  * @ClassName: Turkey
 4  * @author Xingle
 5  * @date 2014-10-9 下午3:54:37
 6  */
 7 public interface Turkey {
 8     
 9     public void gobble();
10     public void fly();
11 
12 }

火鸡的具体实现：

 1 /**
 2  * 火鸡的具体实现类
 3  * @ClassName: WildTurkey
 4  * TODO
 5  * @author Xingle
 6  * @date 2014-10-9 下午3:55:23
 7  */
 8 public class WildTurkey implements Turkey{
 9 
10     @Override
11     public void gobble() {
12         System.out.println("Gobble gobble.");
13     }
14 
15     @Override
16     public void fly() {
17         System.out.println("I'm flying a short distance.");
18     }
19 
20 }

下面，是一个适配器：

 1 /**
 2  * 鸭子适配器
 3  * @ClassName: TurkeyAdapter
 4  * TODO
 5  * @author Xingle
 6  * @date 2014-10-9 下午3:58:12
 7  */
 8 public class TurkeyAdapter implements Duck{
 9     
10     Turkey turkey;
11     
12     public TurkeyAdapter(Turkey turkey){
13         this.turkey = turkey;
14     }
15 
16     @Override
17     public void quack() {
18         turkey.gobble();
19     }
20 
21     @Override
22     public void fly() {
23         for(int i=0;i<5;i++){
24             turkey.fly();
25         }
26         
27     }
28 
29 }

测试程序：

 1 /**
 2  * 适配器测试程序
 3  * @ClassName: TurkeyTestDrive
 4  * @author Xingle
 5  * @date 2014-10-9 下午4:03:21
 6  */
 7 public class TurkeyTestDrive {
 8     public static void main(String[] args){
 9         //先创建一个鸭子和一个火鸡
10         MallardDuck duck = new MallardDuck();
11         WildTurkey turkey = new WildTurkey();
12         //将火鸡包装进一个火鸡适配器中，使它看起来像是一只鸭子
13         Duck turkeyAdapter = new TurkeyAdapter(turkey);
14         //测试火鸡，让它咯咯叫，让它飞
15         System.out.println("The Turkey says...");
16         turkey.gobble();
17         turkey.fly();
18         
19         //先测试鸭子，传入一个鸭子对象
20         System.out.println("\nThe Duck says...");
21         testDuck(duck);
22         
23         //接着测试，传入一个假装是鸭子的火鸡
24         System.out.println("\nThe TurkeyAdapter says...");
25         testDuck(turkeyAdapter);
26     }
27 
28      static void testDuck(Duck duck) {
29          duck.quack();
30          duck.fly();
31     }
32 
33 }