String-12-Integer to Roman

Description:

Given an integer, convert it to a roman numeral.

Input is guaranteed to be within the range from 1 to 3999.

Solution:

class Solution {
private static int[] nums = new int[]{1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1};
private static String[] strings = new String[]{"M", "CM", "D", "CD", "C", "XC", "L", "XL", "X", "IX", "V", "IV", "I"};

public String intToRoman(int num) {
StringBuilder res = new StringBuilder();
for (int i = 0 ; i < nums.length; i++) {
while (num >= nums[i]) {
res.append(strings[i]);
num -= nums[i];
}
}

return res.toString();
}
}