How to nest objects when building JSON with JSONObject

Question

I'm trying to encode this string for a POST request. Can anyone tell me how I can encode

{"jsonrpc": "2.0", "method": "Files.GetSources", "params":{"media":"music"}, "id": 1}

So far I have

JSONOjbect obj = new JSONObject();
obj.put("jsonrpc", "2.0");
obj.put("method", "Files.GetSources");

But I'm not sure how to put in the rest - can anyone help?

Answer 1

JSONOjbect obj = new JSONObject().put("jsonrpc", "2.0")
    .put("method", "Files.GetSources").put("id", 1)
    .put("params", new JSONObject().put("media", "music"));

Chaining .put() like this is possible because put() returns the object it was called on - for this exact purpose.

Answer 2

If you're asking how you'd put the nested params object in there, you'd probably do:

JSONObject params = new JSONObject();
params.put("media", "music");

obj.put("params", params);

---

To use an array (per your comments below), you'd do something like this:

JSONArray properties = new JSONArray();
properties.put("resume");
properties.put("genre");
properties.put("studio");
...

JSONObject params = new JSONObject();
params.put("properties", properties);

obj.put("params", params);