适配器模式
适配器模式就是 将一个类的接口转换成客户希望的另外一个接口。从而复用旧类的功能，1 public class Adapter {
2
3 public static void main(String[] args) {
4 Network n = new CiscoNetworkAdapter();
5 n.download();
6 }
7 }
8
9 interface Network {
10 void download();
11 }
12
13 class CiscoNetworkAdapter implements Network {
14
15 private Cisco cisco = new Cisco();
16
17 @Override
18 public void download() {
19 cisco.download();
20 }
21 }
22
23 class Cisco {
24 void download() {
25 System.out.println("download with cisco");
26 }
27 }
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