LeetCode 557 Reverse Words in a String III

class Solution {
    public String reverseWords(String s) {
        StringBuilder result = new StringBuilder();

        String[] strs = s.split(" ");

        for (String str : strs) {
            char[] chars = str.toCharArray();
            for (int i = 0, j = chars.length - 1; i < j; i++, j--) {
                char c = chars[i];
                chars[i] = chars[j];
                chars[j] = c;
            }
            result.append(new String(chars)).append(" ");
        }

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