一个经典的多态Demo

class Car{
static int num;
int price;
String name;
Car(int price,String name){
this.price = price;
this.name = name;
}
public String getName() {
return name;
}
public int getPrice() {
return price;
}
public void sell(Car car){
System.out.println("卖"+car.getName()+"车得到了"+car.getPrice());
}
}
class BMW extends Car{
public BMW(int a ,String name) {
super(a, name);

}
public String getName() {
return name;
}
public int getPrice() {
return price;
}
}
class bentian extends Car{

bentian(int price, String name) {
super(price, name);
}
public String getName() {
return name;
}
public int getPrice() {
return price;
}

}

public class dtDemo {

public static void main(String[] args) {
Car car = new Car(100, "s");
car.sell(new BMW(200, "BWM"));
car.sell(new bentian(300, "Bentian"));
}

}