Długość tablicy JSONObject JSON

Przeczytałem poniżej XML w Javie i przekonwertuj na JSonObject [ Org.json.jsonobject ].
i dodaj metadane i wróć jako JSON.

Problem
: Jsonobject Jsonobj = Service.GetMyData ();// Metody niestandardowe i wyzwania

int count = jsonObj.length();

// length is 1
How do I take the correct count from this jsonObj? . The correct count I am referring to is 2 in this case. [2 books]
What I tried?
(1)

System.out.println(jsonObj.length());

// prints 1
API says: length()
Get the number of keys stored in the JSONObject.
(2) Since number of keys is returned as 1, there is no point on trying the below one, still I tried
and got the error of

org.json.JSONException: JSONObject["User"] not found.

System.out.println(jsonObj.getJSONArray("User").length());

(3) Jeśli spróbuję „Użytkownicy”, czyli:

jsonObj.getJSONArray („Users”). Length ()

, mówi, że

JSONObject [„Users”] nie jest JSONArray . 

(4)

JSONObject jsonObj = service.getMyData();

 JSONObject jUsers = jsonObj.getJSONObject("Users");

 JSONObject jUser = jUsers.getJSONObject("User");

 System.out.println(jUser.length());

Błąd:

org.json.JSONException: JSONObject ["User"] nie jest JSONObject.

XML

:

<Users>

 <User>

 <Name>Unni</Name>

 <Books>

 <Book>book1</Book>

 <Book>book2</Book>

 <Book>book3</Book>

 </Books>

 </User>

 <User>

 <Name>Ammu</Name>

 <Books>

 <Book>book1</Book>

 <Book>book2</Book>

 <Book>book4</Book>

 </Books>

 </User>

</Users>

JSON

:

{

 "Users": {

 "User": [

 {

 "Name": "Unni",

 "Books": {

 "Book": [

 "book1",

 "book2",

 "book3"

 ]

 }

 },

 {

 "Name": "Ammu",

 "Books": {

 "Book": [

 "book1",

 "book2",

 "book4"

 ]

 }

 }

 ]

 }

}