cardb

public void addCar(String makerName, String carName, double mpg,int cylinders, int power, int year, int region) throws IllegalArgumentException{

        if ((mpg>0 && mpg<100) || (power>0 && power<1000)) {
            Car newcar= new Car(makerName,carName,mpg,cylinders,power,year,region);
            cars.add(newcar);
        }
        else
            throw new IllegalArgumentException();

    }