How to check the type of a value from a JSONObject?

Question

I'm trying to get the type of the value stored in a JSONObject.

String jString = {"a": 1, "b": "str"}; JSONObject jObj = new JSONObject(jString); 

Is it possible to get the type of the value stored at key "a"; something like jObj.typeOf("a") = java.lang.Integer?

Answer 1

You can get the object from the JSON with the help of JSONObject.get() method and then using the instanceof operator to check for the type of Object.

Something on these lines:-

String jString = "{\"a\": 1, \"b\": \"str\"}"; JSONObject jObj = new JSONObject(jString); Object aObj = jObj.get("a"); if (aObj instanceof Integer) {     // do what you want } 

Answer 2

The best solution is to use JSONObject.get() and check for the type using instanceof operator.