Question regarding Collections Library Usage/Behaviour

Question

Hi All,
I am trying to write a dynamic JSON formatter based on my business logic. I am trying something like this:
Code:
JSONArray testArray= new JSONArray();
JSONObject obj1 = new JSONObject();
obj1.put("TestKey","Test Value");
testArray.add(obj1);This works perfectly with the JSONObject showing up in the JSONArray.
However, when I try an anonymous class or simultanous JSONObject.put() inside JSONArray. The size of the array is updated but not the ENTRY i.e. I cant see any Key Value pair updated inside the array.
Code:
import org.json.simple.JSONObject;
import org.json.simple.JSONValue;
import org.json.simple.JSONArray;
JSONArray testArray= new JSONArray();
JSONObject obj1 = new JSONObject();
testArray.add(obj1.put("TestKey","TestValue"));
[OR]
testArray.add(new JSONObject().put("TestKey","TestValue"));In follow up with them same discussion, when I try the following snippet:
public static void main(String[] args)
       Set<HashMap<String,String>> testObj = new HashSet<HashMap<String,String>>();
        test.add((HashMap)(new HashMap().put("test","value")));       
    }I still can't see any HshMap object created in testObj. I want to know why is it failing this way?
Thank you all in advance.
Note: Please excuse me if this post is not allowed here. I am posting it here as the API for JSON formatting i.e.JSONArray and JSONObject classes are straightforward extensions to ArrayList and HashMap.
Harsh
Edited by: codeNombre on Aug 26, 2010 6:23 PM

Answer 1

test.add((HashMap)(new HashMap().put("test","value")));        You're making an incorrect assumption about what HashMap.put() returns. Check it.