leetcode 557. 反转字符串中的单词 III

题目

给定一个字符串，你需要反转字符串中每个单词的字符顺序，同时仍保留空格和单词的初始顺序。

示例 1:
输入: "Let's take LeetCode contest"
输出: "s'teL ekat edoCteeL tsetnoc"

传送门 leetcode 557

class Solution {
    public String reverseWords(String s) {
        if (s == null || s.length() == 0) return s;
        String[] str = s.split(" ");
        for (int i = 0; i < str.length; i++) {
            str[i] = new StringBuilder(str[i]).reverse().toString();
        }
        StringBuilder sb = new StringBuilder();
        for (String st : str) {
            sb.append(st + " ");
        }
        return sb.toString().trim();
    }
}