9.20

实验9：桥接模式

本次实验属于模仿型实验，通过本次实验学生将掌握以下内容：

1、理解桥接模式的动机，掌握该模式的结构；

2、能够利用桥接模式解决实际问题。

 

[实验任务一]：两个维度的桥接模式

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。

实验要求：

1.画出对应的类图；

2.提交源代码；

3.注意编程规范。

 

 

JAVA

Vehicle.java

package qiaojie;

 

public interface Vehicle {

    

    public void run();

    

}

 

Road.java

package qiaojie;

 

public abstract class Road {

    

    protected Vehicle vehicle;

    public void setVehicle(Vehicle ve) {

        this.vehicle=ve;

    }

    public abstract void drive();

    

}

 

Shuini.java

package qiaojie;

 

public class Shuini extends Road{

    

    public void drive() {

        vehicle.run();

        System.out.println("行驶在水泥路");

    }

    

}

Liqing.java

package qiaojie;

 

public class Liqing extends Road{

    

    public void drive() {

        vehicle.run();

        System.out.println("行驶在沥青路");

    }

    

}

Bus.java

package qiaojie;

 

public class Bus implements Vehicle{

    

    @Override

    public void run() {

        System.out.print("Bus");    

    }

    

}

 

Car.java

package qiaojie;

 

public class Car implements Vehicle{

    

    @Override

    public void run() {

        System.out.print("Car");    

    }

    

}

 

Main.java

package qiaojie;

 

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();

    }

    

}