[LeetCode]--58. 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.

我利用java的库函数，split做的。

public int lengthOfLastWord(String s) {
        if (s == null || s.length() == 0)
            return