diff --git a/Maths/RomanNumeralUtil.java b/Maths/RomanNumeralUtil.java new file mode 100644 index 000000000..661a2878b --- /dev/null +++ b/Maths/RomanNumeralUtil.java @@ -0,0 +1,37 @@ +/** + * Translates numbers into the Roman Numeral System. + * + * @see Roman numerals + * @author Sokratis Fotkatzikis + * @version 1.0 + */ +public class RomanNumeralUtil { + + private static final int MIN_VALUE = 1; + private static final int MAX_VALUE = 5999; + //1000-5999 + private static final String[] RN_M = {"", "M", "MM", "MMM", "MMMM", "MMMMM"}; + //100-900 + private static final String[] RN_C = {"", "C", "CC", "CCC", "CD", "D", "DC", "DCC", "DCCC", "CM"}; + //10-90 + private static final String[] RN_X = {"", "X", "XX", "XXX", "XL", "L", "LX", "LXX", "LXXX", "XC"}; + //1-9 + private static final String[] RN_I = {"", "I", "II", "III", "IV", "V", "VI", "VII", "VIII", "IX"}; + + public static String generate(int number) { + if (number < MIN_VALUE || number > MAX_VALUE) { + throw new IllegalArgumentException( + String.format( + "The number must be in the range [%d, %d]", + MIN_VALUE, + MAX_VALUE + ) + ); + } + + return RN_M[number / 1000] + + RN_C[number % 1000 / 100] + + RN_X[number % 100 / 10] + + RN_I[number % 10]; + } +}