LeetCode - Excel Sheet Column Number

判断string是否相同不能直接== 用equals...

public int titleToNumber(String s) {int result = 0;int weight = 1;        for (int i = s.length() - 1; i >= 0; i--) {        char col = s.charAt(i);        int value = (int)col - 64;        result = value * weight + result;        weight *= 26;        }        return result;    }