58. 最后一个单词的长度
class Solution {
public int lengthOfLastWord(String s) {
if (s == null || s.length() == 0)
return 0;
int high = s.length() - 1;
while (high >= 0 && s.charAt(high) == ' ')
--high;
if (high < 0)
return 0;
int low = high - 1;
while (low >= 0 && s.charAt(low) != ' ')
--low;
return high - low;
}
}