[LeetCode]168. Excel Sheet Column Title

题目描述:Given a positive integer, return its corresponding column title as appear in an Excel sheet.
For example:
分析：根据数字返回在excel表格中的表示

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

解题思路:将十进制转换为二十六进制。注：初始值从1开始，在进行求模运算和除运算时要将n-1.

public String convertToTitle(int n) {         StringBuilder sb = new StringBuilder();         int temp;         while(n>0){             temp = (n-1)%26;             sb.append((char)(temp+'A'));             n=(n-1)/26;         }         return sb.reverse().toString();     }