【leetcode】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.

public class Solution {
    public int lengthOfLastWord(String s) {
    int length = 0;
		int i;
		char[] charArray = s.toCharArray();
		i = s.length() - 1;

		while (i > -1 && charArray[i] == ' ') {
			i--;
		}
		if (i < 0) {
			length = 0;
		} else {
			for (int index = i; index > -1; index--) {
				System.out.println(charArray[index]);
				if (charArray[index] != ' ') {
					length++;
				} else {
					break;
				}
			}

		}

		return length;
    }
}