Lettcode_58_Length of Last Word_字符串最后出现单词的长度

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.

JAVA代码实现如下所示。

	public int lengthOfLastWord(String s) {
		if (s == null || s.length() == 0)
			return 0;
		int len = s.length();
		int count = 0;
		for (int i = len - 1; i >= 0; i--) {
			if (s.charAt(i) == ' ') {
				if (count == 0)
					continue;
				else
					return count;
			}
			count++;
		}
		return count;
	}