原题链接: https://oj.leetcode.com/problems/reverse-words-in-a-string/

public String reverseWords(String s) {
    String[] words = s.trim().split("\\s+");
    StringBuilder sb = new StringBuilder("");

    for (int i = words.length - 1; i >= 0; i--) {
        sb.append(words[i]);

        if (i >= 1) {
            sb.append(" ");
        }
    }

    return sb.toString();
}