阿拉伯数字（十进制）转换为罗马数字

public class IntToRoman {

	public static void main(String[] args) throws NumberFormatException, IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int value = Integer.valueOf(br.readLine());
		System.out.println(intToRoman(value));
	}

	public static String intToRoman(int num) {
		int[] values = { 1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1 };
		String[] strs = { "M", "CM", "D", "CD", "C", "XC", "L", "XL", "X", "IX", "V", "IV", "I" };

		StringBuilder sb = new StringBuilder();

		for (int i = 0; i < values.length; i++) {
			while (num >= values[i]) {
				num -= values[i];
				sb.append(strs[i]);
			}
		}
		return sb.toString();
	}

}