设计模式-桥接模式

题目：

用桥接模式实现在路上开车这个问题，其中，车可以是car或bus，路可以是水泥路或沥青路。

 

 

 

 

Java代码

package t9;

public class Bus implements Vehicle {
    @Override
    public void drive() {
        System.out.print("bus");
    }
}


package t9;

public class Car implements Vehicle {
    @Override
    public void drive() {
        System.out.print("car");
    }
}


package t9;

public class CementRoad extends Road {
    public CementRoad(Vehicle vehicle) {
        super(vehicle);
    }

    @Override
    public void driveOnRoad() {
        super.vehicle.drive();
        System.out.println("行驶在水泥路");
    }
}


package t9;

public class main {
    public static void main(String[] args) {
        Road road = new CementRoad(new Car());
        road.driveOnRoad();
    }
}


package t9;

public abstract class Road {
    protected Vehicle vehicle;

    public Road(Vehicle vehicle) {
        this.vehicle = vehicle;
    }

    public abstract void driveOnRoad();
}


package t9;

public class UnpavedRoad extends Road {
    public UnpavedRoad(Vehicle vehicle) {
        super(vehicle);
    }

    @Override
    public void driveOnRoad() {
        super.vehicle.drive();
        System.out.println("行驶在沥青路");
    }
}

package t9;

public interface Vehicle {
    public void drive();
}

 

 

c++代码

#include <iostream>
using namespace std;

class AbstractCar {
    public:
        virtual void run () = 0;
};

class Car:public AbstractCar {
    public:
        void run () {
            cout<<"Car行驶在";
        }
};

class Bus:public AbstractCar {
    public:
        void run () {
            cout<<"Bus行驶在";
        }
};

class AbstractRoad {
    public:
        AbstractRoad(AbstractCar *car):car(car){}
        virtual void run() = 0;
    protected:
        AbstractCar *car;
};

class SpeedWay: public AbstractRoad {
    public:
        SpeedWay(AbstractCar *car):AbstractRoad(car){}
        void run() {
            car->run();
            cout<<" 水泥路"<<endl;
        }
};

class Street: public AbstractRoad {
    public:
        Street(AbstractCar *car):AbstractRoad(car){}
        void run() {
            car->run();
            cout<<" 沥青路"<<endl;
        }
};
main() {
    AbstractRoad *carOnSpeedway     = new SpeedWay(new Car);
    AbstractRoad *busOnSpeedway     = new SpeedWay(new Bus);
    AbstractRoad *carOnStreet       = new Street(new Car);
    AbstractRoad *busOnStreet       = new Street(new Bus);
    carOnSpeedway     ->run();
    busOnSpeedway     ->run();
    carOnStreet       ->run();
    busOnStreet       ->run();
}