Given a stringsconsists 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;
        s = s.trim();

        String[] sArray = s.split(" ");
        return sArray[sArray.length - 1].length();
    }
}