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()); }}