设计模式-依赖倒置

public interface IDriver {

  //是司机就应该会驾驶汽车

   public void drive(ICar car);

}

 

public class Driver implements IDriver{

    //司机的主要职责就是驾驶汽车

    public void drive(ICar car){

        car.run();

    }

}

public interface ICar {

    //是汽车就应该能跑

    public void run();

}

public class Benz implements ICar{

    //汽车肯定会跑

    public void run(){

        System.out.println("奔驰汽车开始运行...");

    }

}

public class BMW implements ICar{

    //宝马车当然也可以开动了

    public void run(){

        System.out.println("宝马汽车开始运行...");

    }

}

public class Client {

    public static void main(String\[\] args) {

        IDriver zhangSan = new Driver();

        ICar benz = new Benz();

        //张三开奔驰车

        zhangSan.drive(benz);

    }

}