Im doing a program in GWT. Here is the snippet where Im having problem

 private String[] populateRSSData() {
  1==>> String[] data = null;
  try {
   new RequestBuilder(RequestBuilder.GET,
     "../database.php?action=populaterss").sendRequest(null,
     new RequestCallback() {

      @Override
      public void onResponseReceived(Request request,
        Response response) {
       2==>> data=response.getText().split("~");
      }

      @Override
      public void onError(Request request, Throwable exception) {
       Window.alert(exception.getMessage());
      }
     });
  } catch (RequestException e) {
   Window.alert(e.getMessage());
  }

  return data;
 }

Now the problem arises that I get an error that the variable 1==>> data should be declared final. But if I declare it as final then i cannot store the datas in 2==>>

The error i get

Cannot refer to a non-final variable data inside an inner class defined in a different method RSS_Manager.java

Please suggest