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，

public class Adapter {

    public static void main(String[] args) {
        Network n = new CiscoNetworkAdapter();
        n.download();
    }
}

interface Network {
    void download();
}

class CiscoNetworkAdapter implements Network {

    private Cisco cisco = new Cisco();
    
    @Override
    public void download() {
        cisco.download();
    }
}

class Cisco {
    void download() {
        System.out.println("download with cisco");
    }
}