String:reverseWords

public static String reverseWords(String s) {
        String[] parts = s.trim().split("\\s+");
        String out = "";
        if (parts.length > 0) {
            for (int i = parts.length - 1; i > 0; i--) {
                out += parts[i] + " ";
            }
            out += parts[0];
        }
        return out;
    }