Refactoring-ch01-extracting-frequent-renter-points-part2.java

class Customer...
    public String statement() {
        Enumeration rentals = _rentals.elements();
        String result = "Rental Record for " + getName() + "\n";
        while (rentals.hasMoreElements()) {
            Rental each = (Rental) rentals.nextElement();
            //show figures for this rental
            result += "\t" + each.getMovie().getTitle()+ "\t" +
            String.valueOf(each.getCharge()) + "\n";
        }
        //add footer lines
        result += "Amount owed is " +
        String.valueOf(getTotalCharge()) + "\n";
        result += "You earned " + String.valueOf(getTotalFrequentRenterPoints())
                + " frequent renter points";
        return result;
    }

    private int getTotalFrequentRenterPoints(){
        int result = 0;
        Enumeration rentals = _rentals.elements();
        while (rentals.hasMoreElements()) {
            Rental each = (Rental) rentals.nextElement();
            result += each.getFrequentRenterPoints();
        }
        return result;
    }