//saving in JSON form

    JSONObject json=new JSONObject();
    JSONArray jarray=new JSONArray();
    JSONObject details;
   try
    {
       for(int i=0;i<10;i++)
       {
               details = new JSONObject();
               details.put("firstname:",fname);
               details.put("lastname:",lname);
               details.put("username:",uname);
               details.put("email:",email);
               details.put("password:",pswd);
               details.put("confirm password:",repswd);
               details.put("phonenumber:",phonenumber);
               details.put("security question:",SecurityQuestion);
               details.put("answer:",tarea);
               jarray.put(details);
       }
               json.put("details",jarray);
    }
    catch(JSONException e)
    {
        out.print("unable to save in JSON File");
        e.printStackTrace();
    }
   response.setContentType("application/json");
   response.getWriter().write(json.toString());