public class PriceFormat { static String roundPrice(double price) { return String.format("%.2f", price); } static String rubInflection(double price) { if (price % 10 == 1 && price % 100 != 11) { return "рубль"; } else if (price % 10 >= 2 && price % 10 <= 4 && (price % 100 < 10 || price % 100 >= 20)) { return "рубля"; } else { return "рублей"; } } }