Given a non-zero 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
参考：http://www.cnblogs.com/ganganloveu/p/4175848.html
这道题以为很easy,但还是参考了别人的才A出来了
java中能用StringBuffer还是用StringBuffer,感觉StringBuffer要比String要好用一点
1 public class Solution { 2 public String convertToTitle(int n) { 3 StringBuffer result = new StringBuffer(); 4 while(n > 0){ 5 n--; 6 int temp = n % 26 + 65; 7 result.append((char)temp); 8 n = n / 26; 9 10 } 11 for(int i = 0, j = result.length() - 1; i < j;i++, j--){ 12 char temp = result.charAt(i); 13 result.setCharAt(i, result.charAt(j)); 14 result.setCharAt(j, temp); 15 16 } 17 return result.toString(); 18 } 19 }
原文：http://www.cnblogs.com/luckygxf/p/4176067.html