How to escape the quotes in JSON Object?

Question

Below is my method which makes the JSONObject and then print out the JSONString.

I am using Google GSON.

private String gen         


        

Answer 1

Your problem is that with

jsonObject.addProperty("ap", ap.toString());

you are adding a property which is the String representation of a Set in Java. It has nothing to do with JSON (even if the format looks the same).

You will have to convert your Set into a JsonElement (a JsonArray really but you won't see that).

Create a Gson object somewhere

Gson gson = new Gson();

and use it to convert your Set elements to JsonElement objects and add them to the JsonObject.

jsonObject.add("ap", gson.toJsonTree(ap));
jsonObject.add("bp", gson.toJsonTree(bp));

Gson has its conventions, it converts a Set into a JsonArray which is a sub type of JsonElement and you can therefore add it with JsonObject#add(String, JsonElement).