class Car{
String color;
int door;
void drive(){
System.out.println("부릉부릉!");
}
void stop(){
System.out.println("정지합니다!");
}
}//end of Car class
class FireEngine extends Car{
void water(){
System.out.println("물을 뿌립니다!");
}
}//end of FireEngine class
public class CastingTest1 {
public static void main(String[] args) {
Car car = null;
FireEngine fe = new FireEngine();
FireEngine fe2 = null;
fe.water();
car = fe;
car.water(); //Car클래스의 멤버변수가 아닌것은 사용할 수 없다
fe2 = (FireEngine)car;
fe2.water();
fe2.drive();
fe2.stop();
}//end of main method
}//end of CastingTest1 class