Convert org.json.JSON object to javax.json.JsonObject in JAVA

I’m having a org.json.JSON and I need to convert it into javax.json.JsonObject without using JsonReader. my actual code here,

JSONObject rJson = getResonseJson();
JsonReader jsonReader = Json.createReader(new StringReader(rJson.toString()));
JsonObject jsonReq = jsonReader.readObject();

Here I used JsonReader to convert JSONObject to JsonObject. Is there any possible alternate ways to perform the same job without using JsonReader?