【LeetCode】- Length of Last Word（最后一个单词的长度）

[ 问题: ]

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.

给你一个字符串，设法获取它最后一个单词的长度。假设这个单词不存在，则返回0。

[ 分析 : ]

A word is defined as a character sequence consists of non-space characters only.
For example, 
Given s = "Hello World",
return 5.

[ 解法: ]

public class Solution {

	public int lengthOfLastWord(String s) {
		if (s != null && !s.trim().equals("")) {
			String[] arr = s.trim().split(" ");
			int length = arr[arr.length - 1].length();
			return length;
		}
		return 0;
	}

	public static void main(String[] args) {
		String s = "leet code";
		System.out.println(new Solution().lengthOfLastWord(s));
	}
}