Length of Last Word

题目描述
Given a string s consists of upper/lower-case alphabets and empty space characters ' ', return the length of last word in the string.

If the last word does not exist, return 0.

Note: A word is defined as a character sequence consists of non-space characters only.

Example:
Input: "Hello World"
Output: 5

我的Code如下：

class Solution {
    public int lengthOfLastWord(String s) {
        if(s.equals("")){
            return 0;
        }   
        //这里稍微注意下：如果s="hello",那么分割后strs的长度为1；
        //如果s=" "，那么分割后strs的长度为0；
        String[] strs = s.split(" ");
        if(strs.length == 0){            
            return 0;
        }
        
        return strs[strs.length - 1].length();
    }
}