桥接模式

java

//Road.java
package shiyan9;

public abstract class Road {
    protected Vehicle vehicle;
    public void setVehicle(Vehicle ve) {
        this.vehicle=ve;
    }
    public abstract void drive();
}
//Shuini.java
package shiyan9;

public class Shuini extends Road{
    public void drive() {
        vehicle.run();
        System.out.println("行驶在水泥路");
    }
}
//Liqing.java
package shiyan9;

public class liqing extends Road{
    public void drive() {
        vehicle.run();
        System.out.println("行驶在沥青路");
    }
}
//Vehicle.java
package shiyan9;

public interface Vehicle {
    public void run();
}
//Bus.java
package shiyan9;

public class Bus implements Vehicle{
    @Override
    public void run() {
        System.out.print("Bus");    
    }
}
//Car.java
package shiyan9;

public class Car implements Vehicle{
    @Override
    public void run() {
        System.out.print("Car");    
    }
}
//Main.java
package shiyan9;

import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Vehicle vehicle = null;
        Road road = null;
        System.out.println("请选择：1、Car/水泥路  2、Car/沥青路  3、Bus/水泥路  4、Bus/沥青路");
        Scanner input=new Scanner(System.in);
        int i=input.nextInt();
        if(i==1) {
            vehicle=(Vehicle)new Car();
            road=(Road)new Shuini();
        }else if(i==2) {
            vehicle=(Vehicle)new Car();
            road=(Road)new liqing();
        }else if(i==3){
            vehicle=(Vehicle)new Bus();
            road=(Road)new Shuini();
        }else if(i==4) {
            vehicle=(Vehicle)new Bus();
            road=(Road)new liqing();
        }else {
            System.out.println("输入无效！");
        }
        road.setVehicle(vehicle);
        road.drive();
    }
}





C++

#include <iostream>

using namespace std;

class Transportation
{
public:
    virtual void drive(){}
};

class Car:public Transportation
{
public:
    void drive()
    {
        cout<<"小轿车";
    }
};

class Bus:public Transportation
{
public:
    void drive()
    {
        cout<<"大巴";
    }
};

class Road
{
public:
    Transportation* transportation;

    Road(Transportation* transportation)
    {
        this->transportation=transportation;
    }
    virtual void driveOnRoad(){}
};

class CementRoad:public Road
{
public:
    CementRoad(Transportation* transportation):Road(transportation)
    {

    }

    void driveOnRoad()
    {
        transportation->drive();
        cout<<"行驶在水泥路"<<endl;
    }
};

class BituminousRoad:public Road
{
    public:
    BituminousRoad(Transportation* transportation):Road(transportation)
    {

    }
    void driveOnRoad()
    {
        transportation->drive();
        cout<<"行驶在柏油路"<<endl;
    }
};


int main()
{
    Transportation* transportation;
    Car car=Car();
    transportation=&car;
    CementRoad(transportation).driveOnRoad();
}