leetcode-151-翻转字符串里的单词

题目描述：

方法一：

        return " ".join(s.split()[::-1])

 方法二：

class Solution:
    def reverseWords(self, s: str) -> str:
        res = re.findall('\S+',s)
        return " ".join(res[::-1])

 java:

class Solution {
    public String reverseWords(String s) {
        s = s.trim();
        List<string> wordList = Arrays.asList(s.split("\\s+"));
        Collections.reverse(wordList);
        return String.join(" ",wordList);
    }
}