适配器模式（Adapter Pattern）

适配器模式本质就是做一层转换。

1、适配器模式案例

以手机用wifi上网，电脑用网线上网，为电脑加个适配器，实现电脑也可wifi上网

public interface PhoneNetWorld {
    void wifi();
}

public class Phone implements PhoneNetWorld{
    @Override
    public void wifi() {
        System.out.println("手机上网");
    }
}

public interface ComputerNetWorld {
    void networkCable();
}

public class Computer implements ComputerNetWorld{
    @Override
    public void networkCable() {
        System.out.println("电脑上网");
    }
}

本来电脑上网要通过Computer.networkCable()方式，现在Computer也想通过wifi()上网

public class ComputerWifiAdapter implements PhoneNetWorld{

    private Computer computer;

    public ComputerWifiAdapter(Computer computer) {
        this.computer = computer;
    }

    @Override
    public void wifi() {
        computer.networkCable();
    }
}

public class ClientTest {
    public static void main(String[] args) {
        PhoneNetWorld phoneNetWorld = new Phone();
        phoneNetWorld.wifi();

        PhoneNetWorld computerNetWorld = new ComputerWifiAdapter(new Computer());
        computerNetWorld.wifi();
    }
}
/**
 * 输出结果：
 * 手机上网
 * 电脑上网
 * /