Leetcode 刷题：Q58 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) {

        //handle extreme conditions

        if(s==null || s.length()==0)

        return 0;

        

        int count=0;

        for(int i=s.length()-1;i>=0;i--){

                if(s.charAt(i) != ' ')

                count++;

                if(s.charAt(i) == ' ' && count != 0)

                return count;

        }

        return count;

    }

}