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.

Example:

Input: “Hello World”
Output: 5

class Solution {
    public int lengthOfLastWord(String s) {
        if(s == null || s.length() == 0){
            return 0;
        }
        String[] strs = s.split(" ");
        return strs.length != 0 ? strs[strs.length-1].length() : 0;
    }
}