[leetcode]Length of Last Word

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. 

算法思路：

这道题貌似是leetcode中最easy的一道了吧，心情不好，状态不佳，就找软柿子捏吧(注意字符串以空格结尾)

代码如下：

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