11-6

用桥接模式实现在路上开车

 

 

 

 

 

 

 

 

 

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();
}

}