Related to question Excel Sheet Column Title
Given a column title as appear in an Excel sheet, return its corresponding column number.
For example:
A -> 1
B -> 2
C -> 3
...
Z -> 26
AA -> 27
AB -> 28
题意：给定Excel表格中的某一列标题，返回其在Excel表格中相对应的列数
思路：相当于26进制转10进制。跟Excel Sheet Column Title一题相对应。
public int titleToNumber(String s) { int n = 0; int temp = 1; char[] ch = s.toCharArray(); for(int i = ch.length - 1; i >= 0; i--){ n = n + (ch[i] - ‘A‘ + 1) * temp; temp *= 26; } return n; }