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.

Example
Given s = “Hello World”, return 5.

Note
A word is defined as a character sequence consists of non-space characters only.

---

分析

split()函数

public class Solution {    /**     * @param s A string     * @return the length of last word     */    public int lengthOfLastWord(String s) {        if (s == null | s.isEmpty()) return 0;        // trim right space        String[] a = s.split(" ");         return a[a.length].length();    }}