leetcode Integer to Roman 难度系数3 3.5

Question：

Given an integer, convert it to a roman numeral.

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

public class Solution {
   public String intToRoman(int num) {
		StringBuffer result = new StringBuffer();
		String[] Roman = { "M", "CM", "D", "CD", "C", "XC", "L", "XL", "X",
				"IX", "V", "IV", "I" };
		int[] number = { 1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1 };
		for(int i =0;num!=0;i++){
			while(num>=number[i]){
				num-=number[i];
				result.append(Roman[i]);
			}
		}
		return result.toString();
		
	}
}