NumberOfBottlesOfBeerOnTheWall

public abstract class NumberOfBottlesOfBeerOnTheWall {

    private NumberOfBottlesOfBeerOnTheWall() {
        throw new IllegalArgumentException("Not expecting instances of this class.");
    }

    public static void singNumberOfBottlesOfBeerOnTheWall(final int numberOfBottles) {

        if (numberOfBottles >= 0) {
            printVerseForThisManyBottles(numberOfBottles);
            singNumberOfBottlesOfBeerOnTheWall(numberOfBottles - 1);
        }
    }

    private static void printVerseForThisManyBottles(final int numberOfBottles) {

        printNBottlesOfBeer(numberOfBottles, " on the wall. ");
        printNBottlesOfBeer(numberOfBottles, ". ");

        if (numberOfBottles > 0) {
            printTakeOneDownLeaving(numberOfBottles);
        } else {
            printNoMoreBottlesToPassAround();
        }

        System.out.println();
    }

    private static void printTakeOneDownLeaving(final int numberOfBottles) {
        System.out.print("Take "
                + ((numberOfBottles == 1) ? "it" : "one")
                + " down and pass it around. ");

        printNBottlesOfBeer(numberOfBottles - 1, " on the wall.");
    }

    private static void printNoMoreBottlesToPassAround() {
        System.out.print("There are no more to pass around. ");

        printNBottlesOfBeer(0, " on the wall.");
    }

    private static void printNBottlesOfBeer(final int numberOfBottles, final String postfix) {
        System.out.print(((numberOfBottles == 0) ? "No" : numberOfBottles)
                + " "
                + ((numberOfBottles == 1) ? "bottle" : "bottles")
                + " of beer"
                + postfix);
    }

}