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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
1 public class Solution { 2 public String convertToTitle(int n) { 3 if (n <= 0) return ""; 4 5 StringBuilder sb = new StringBuilder(); 6 7 while(n >= 1){ 8 char ch = (char) ((n - 1) % 26 + ‘A‘); 9 n = (n - 1) / 26; 10 sb.append(ch); 11 } 12 13 sb.reverse(); 14 return sb.toString(); 15 } 16 }
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原文地址：http://www.cnblogs.com/beiyeqingteng/p/5724482.html
