LeetCode28|最后一个单词的长度

输入: "Hello World"
输出: 5

 
public class LengthOfLastWordTest {
    public static void main(String[] args) {
        String str = "a ";
        int lengthOfLastWord = lengthOfLastWord(str);
        System.out.println("lengthOfLastWord = " + lengthOfLastWord);
    }

    public static int lengthOfLastWord(String s) {
        if (s == null || s.length() == 0) {
            return 0;
        }
        char[] chars = s.toCharArray();
        int length = chars.length;
        int count = 0;
        for (int i = length - 1; i >= 0; i--) {
            if (chars[i] != ' ') {
                count++;
            } else if (count > 0) {
                return count;
            }
        }
        return count;
    }
}