org.json.JSONObject.getLong gives imprecise result

Question

In android, as we can see attached figure, the json that I received from server is "id=-7051563524465472446" but the code jsonObject.getLong("id") gives -7051563524465472512.

I can see every getLong conversion has imprecise result(or lose precision?) in last 4 digits. Is there anything that I missed?

My settings: java 1.6.0_41, Android 4.1.2, IntelliJ 12 IDE.

Answer 1

Long.parseLong(jsonObject.getString("id")) gives precise result.

Answer 2

This would suggest the code for getLong() is doing some dubious conversion, possibly by using double.

This looks to be the case based on this issue report. Looks to have been fixed in a later version.

Answer 3

I too faced this problem very recently.. Solved it by using the code:

Long.valueOf(jarray.getString((index)))