58. Length of Last Word

问题描述：
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：

public class Solution {
    public int lengthOfLastWord(String s) {
        String s1 = s.trim();
        String[] ss = s1.split(" ");
        int length = ss.length;
        return ss[length-1].length();
    }
}