Reverse Words in a Sentence

class Main {
    public static void main(String[] args) {
        reverseWords1("a a a b ");
        reverseWords2("ab ac ad be ");
    }
    public static void reverseWords1(String s){
        String[] a = s.split(" ");
        StringBuilder sb = new StringBuilder();
        for(int i = a.length-1; i >= 0; i--){
            sb.append(a[i]).append(" ");
        }
        System.out.print(sb.toString());
    }
     public static void reverseWords2(String s){
        String[] a = s.split(" ");
        StringBuilder res = new StringBuilder();
        for(String words : a){
            StringBuilder sb = new StringBuilder(words);
            res.append(sb.reverse()).append(" ");
        }
        System.out.print(res.toString());
    }
}