leetcode-557-easy

Reverse Words in a String III

Given a string s, reverse the order of characters in each word within a sentence while still preserving whitespace and initial word order.

Example 1:

Input: s = "Let's take LeetCode contest"
Output: "s'teL ekat edoCteeL tsetnoc"
Example 2:

Input: s = "God Ding"
Output: "doG gniD"
Constraints:

1 <= s.length <= 5 * 104
s contains printable ASCII characters.
s does not contain any leading or trailing spaces.
There is at least one word in s.
All the words in s are separated by a single space.

思路一：分割字符串，然后反转每一个单词

    public String reverseWords(String s) {

        String[] arr = s.split("\\s");

        StringBuilder sb = new StringBuilder();
        for (String s1 : arr) {
            sb.append(new StringBuilder(s1).reverse()).append(" ");
        }

        return sb.substring(0, sb.length() - 1);
    }