Excel Sheet Column Title

Given a positive integer, return its corresponding column title as appear in an Excel sheet.

For example:

    1 -> A    2 -> B    3 -> C    ...    26 -> Z    27 -> AA    28 -> AB 

<pre name="code" class="java">public class Solution {    public String convertToTitle(int n) {        StringBuilder result = new StringBuilder();        while(n>0){            n--;            result.insert(0, (char)('A' + n % 26));            n /= 26;        }        return result.toString();    }}