Refactoring-ch01-replace-cond-with-polymorphism-before.java

class Rental...
    double getCharge() {
        double result = 0;
        switch (getMovie().getPriceCode()) {
            case Movie.REGULAR:
                result += 2;
                if (getDaysRented() > 2)
                result += (getDaysRented() - 2) * 1.5;
                break;
            case Movie.NEW_RELEASE:
                result += getDaysRented() * 3;
                break;
            case Movie.CHILDRENS:
                result += 1.5;
                if (getDaysRented() > 3)
                result += (getDaysRented() - 3) * 1.5;
                break;
        }
        return result;
    }