singleDigitsImpl

RomanNumerals.java

public class RomanNumerals {

    public static String convert(int number) {
        if (number == 5) {
            return "V";
        } else if (number ==10) {
            return "X";
        } else if (number == 50) {
            return "L";
        } else if (number == 100) {
            return "C";
        } else if (number == 500) {
            return "D";
        } else if (number == 1000) {
            return "M";
        }
        return "I";
    }
}