[leetcode]Length of Last Word

简单题。

public class Solution {
    public int lengthOfLastWord(String s) {
        // Start typing your Java solution below
        // DO NOT write main() function
        int len = s.length();
        if (len == 0) return 0;
        boolean meetWord = false;
        
        int count = 0;
        for (int i = len-1; i >= 0; i--) {
            char c = s.charAt(i);
            if (isSpace(c) && !meetWord) continue;
            if (isSpace(c) && meetWord) break;
            meetWord = true;
            count++;
        }
        return count;
        
    }
    
    private boolean isSpace(char c) {
        return c == ' ';
    }
}