Extracting Keys from a JSONObject using keySet()

Question

I\'m trying to extract the keys from a JSON Object. The JSON object, in this case, is obtained by making an API call to a social networking site called SkyRock and

Answer 1

The javadoc says:

public interface JsonObject
extends JsonStructure, Map

So, a JSONObject is a Map whose keys are of type String, and whose values are of type JSONValue.

And the javadoc of Map.keySet() says:

Set keySet()

Returns a Set view of the keys contained in this map

So, what JSONObject.keySet() returns is a Set (which is quite logical, since keys of JSON objects are strings).

So all that you want is:

Set keys = posts.keySet();