java实现接口的典型案例

package com.car;

interface Carr{
 //汽车名称
 String getName();
 
 //获得汽车售价
 int getPrice();
}
class BMW implements Carr{
 public String getName(){
  return "BMW";
 }
 
 public int getPrice(){
  return 300000;
 }
}
class CheryQQ implements Carr{
 public String getName(){
  return "CheryQQ";
 }
 
 public int getPrice(){
  return 20000;
 }
}
public class Car {
private int money=0;
 
 public void sellCar(Carr car){
  System.out.println("车型："+car.getName()+"单价："+car.getPrice());
  money+=car.getPrice();
 }
 
 public int getMoney(){
  return money;
 }
 
 public static void main(String[] args) {
  Car aShop = new Car();
  aShop.sellCar(new BMW());
  aShop.sellCar(new CheryQQ());
  System.out.println("总收入："+aShop.getMoney());
 }
}