arabic number to roman number java
public static String arabicToRoman(int number) {
if ((number <= 0) || (number > 4000)) {
throw new IllegalArgumentException(number + " is not in range (0,4000]");
}
List<RomanNumeral> romanNumerals = RomanNumeral.getReverseSortedValues();
int i = 0;
StringBuilder sb = new StringBuilder();
while ((number > 0) && (i < romanNumerals.size())) {
RomanNumeral currentSymbol = romanNumerals.get(i);
if (currentSymbol.getValue() <= number) {
sb.append(currentSymbol.name());
number -= currentSymbol.getValue();
} else {
i++;
}
}
return sb.toString();
}