Java read Json array in Json object

Question

I have a String like this:

{"api_authentication":{"api_response":{"token":"XXXXXXXXXXXXXXXXXXXXXXXXX","firstname":"John","disabled":false,"attempts":0,"id":123,"lastname":"Malkovitch","expire":false,"status":0}}}

I can turn this string into an object:

JSONObject jobj = new JSONObject(response);

But I don't find how to get the token value, I tried creating JSONArrays but i get a not found exception.

• user85421: the posted code seems OK... you should post what you tried, better, a minimal reproducible example else you risk the question being closed (unanswered)
• Harshith Rai: @carlos Heuberger, he says he tried creating JSONArrays, but don't you think that is why he's not able to access it? Because what's posted in the question seems to be more like a single JSON Object rather than an array of JSON's. Just that I'm not really very familiar with JSON's in java. So am making a query with you.
• lcardito: There's no array in that json object. I think you should re-phrase the question. Assuming you're using org.json as a library all you need to do is to get the children objects until you get to the value: jobj.getJSONObject("api_authentication").getJSONObject("api_response").getString("token") If you'd like a better DSL I'd suggest looking into github.com/json-path/JsonPath :)
• TungstenX: Please look at the documentation (2nd Google result for JSONObject): docs.oracle.com/javaee/7/api/javax/json/JsonObject.html You can use e.g. getJsonObject("api_authentication")
• sechanakira: Have you tried String token = jobj.getJSONObject("api_authentication").getJSONObject("api_response").getString("token")

Answer 1

You can do it like this ;

final JSONObject api_authentication = jobj.getJSONObject("api_authentication");
final JSONObject api_response = api_authentication.getJSONObject("api_response");
System.out.println(api_response.getString("token"));

if JSON any value in curlybrackets { ... } , this is jsonObject . If values are in [ ... ], this is JsonArray. Also you can get which one is object or array, and get it relevant fields from this. So all of json elements are with curly bracket in your problem. Get it as JsonObject.

• TungstenX: Remember to check if the key exists before getting the object jobj.containsKey("api_authentication")
• drowny: Of course , this getJsonObject throws JsonException. He have to provide this with try catch block. I posted only how to get token from related json
• TungstenX: Understood it like that; just for newbies that might read this thread ;-)

Answer 2

this might work by the look of what you have posted. The posted code snippet shows that it is a single JSON object and not a JSONArray. Hence try the following:

JSONObject jobj = new JSONObject(response);
String newtoken = jobj.getJSONObject("api_authentication").getJSONObject("api_response").getString("token"); //declare the variable `newtoken` somhwere before of a desired type

Answer 3

You could try something like:

Object tokenValue = jobj.getJSONObject("api_authentication").getJSONObject("api_response").get("token");

After that you can cast the object to the desired type or use something like getString(.) straightaway.

• pdem: it should be getJsonObject, there's no Array in his example.