(Java)LeetCode-58. Length of Last Word

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.

For example, 
Given s = "Hello World",
return 5.

这道题是easy难度的题，确实比较easy，找出字符串中最后一个单词的长度。代码如下：

public class Solution {    public int lengthOfLastWord(String s) {        s = s.trim();        int index = s.lastIndexOf(" ");        return s.length()-index-1;    }}