How to convert a JSON String into Object in Java

Question

Is there any simple way in Java/J2ME to convert a String?

Answer 1

We can easily convert a JSON String to object.

JSONObject json = (JSONObject)new JSONParser().parse("{\"name\":\"MyNode\", \"width\":200, \"height\":100}");
System.out.println("name=" + json.get("name"));
System.out.println("width=" + json.get("width"));

Answer 2

You could probably check out Google's Gson: http://code.google.com/p/google-gson/

Gson gson = new Gson(); // Or use new GsonBuilder().create();MyType target2 = gson.fromJson(json, MyType.class); // deserializes json into target2

You would just need to make a MyType class (renamed, of course) with all the fields in the json string. 

It might get a little more complicated when you're doing the arrays, if you prefer to do all of the parsing manually (also pretty easy) check out http://www.json.org/ and download the Java source for the Json parser objects.