40 lines
1.0 KiB
Java
40 lines
1.0 KiB
Java
package Conversions;
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/**
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* Converting Integers into Roman Numerals
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*
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* <p>('I', 1); ('IV',4); ('V', 5); ('IX',9); ('X', 10); ('XL',40); ('L', 50); ('XC',90); ('C', 100);
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* ('D', 500); ('M', 1000);
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*/
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public class IntegerToRoman {
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private static int[] allArabianRomanNumbers =
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new int[] {1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1};
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private static String[] allRomanNumbers =
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new String[] {"M", "CM", "D", "CD", "C", "XC", "L", "XL", "X", "IX", "V", "IV", "I"};
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// Value must be > 0
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public static String integerToRoman(int num) {
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if (num <= 0) {
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return "";
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}
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StringBuilder builder = new StringBuilder();
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for (int a = 0; a < allArabianRomanNumbers.length; a++) {
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int times = num / allArabianRomanNumbers[a];
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for (int b = 0; b < times; b++) {
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builder.append(allRomanNumbers[a]);
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}
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num -= times * allArabianRomanNumbers[a];
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}
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return builder.toString();
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}
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public static void main(String[] args) {
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System.out.println(IntegerToRoman.integerToRoman(2131));
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}
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}
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