public class Formatter { public static String format(Double price) { String resultPrice; int floorPrice = (int) Math.floor(price); if (floorPrice == 11 || floorPrice % 100 == 11 || floorPrice % 10 >= 5 || floorPrice % 10 == 0) { resultPrice = "рублей"; } else if (floorPrice % 10 == 1) { resultPrice = "рубль"; } else { resultPrice = "рубля"; } return floorCount(price) + " " + resultPrice; } public static String floorCount(double n) { return String.format("%.2f", n); } }