Excel Sheet Column Title-LeetCode#168

168. 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 
    ...

Example 1:

Input: 1
Output: "A"

Example 2:

Input: 28
Output: "AB"

Example 3:

Input: 701
Output: "ZY"

思路：给定正整数，返回Excel工作表中显示的相应列标题。

代码如下：

/**
 * @Author: Poldi
 * @Date: 2019-08-02 14:25
 * @Description:
 */
public class ExcelSheetColumnTitle {
    public static String convertToTitle(int n) {
        StringBuilder result = new StringBuilder();
        while (n > 0) {
            n--;
            result.append((char)('A' + n % 26));
            n /= 26;
        }
        result.reverse();
        return result.toString();
    }

    public static void main(String[] args) {
        ExcelSheetColumnTitle.convertToTitle(28);
    }
}