leetcode第58题最后一个单词长度

判断字符A是不是空格字符：Character.isSpace(A)

class Solution {
    public int lengthOfLastWord(String s) {
        int maxLength = 0;
        int i=s.length()-1;
        int j=0;
        while(i>=0){
            if(Character.isSpace(s.charAt(i))&&j>0)return j;
            if(!Character.isSpace(s.charAt(i))) j++;
            i--;
        }
        return j;
    }
}