我想使用递归函数java反转java之类的字符串，例如name，并且我想使用不带charat方法的

 public static void main(String args){

        String str = "yoosef";
        Log.i("log","main: "+Reverst(str));

    }

    public static String Reverst(String r){
        String x = "";
        if(r.length()==0){
            return "your String is empth";

        }else if(r.length()>1){

            x= Reverst(r.substring(r.length()-1));
            if(x.length()>=r.length()) {
                return r;
            }
            //return Reverst(r.substring(r.length()-1));
        }
        return r;
    }