Length of Last Word

Q:

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.

Solution:

public class Solution {    public int lengthOfLastWord(String s) {        int count = 0;        boolean last = false;        for (int i = s.length()-1; i >= 0; i--) {            if (s.charAt(i) != ' ' && !last) {                last = true;                count++;                continue;            }            if (s.charAt(i) != ' ' && last)                count++;            if (s.charAt(i) == ' ' && last)                break;        }        return count;    }}