The public review draft of the javax.json API does not make the parse location available to application code. Several members of the Toronto JUG indicated that this would be critically important to their adoption of the API.
It was suggested to create a Location type, and make location information available on request from JsonParser.getLocation(), and as a property of JsonParsingException.
Jitu pointed out that this was previously discussed on the mailing list. Here is that thread: http://java.net/projects/json-processing-spec/lists/users/archive/2012-11/message/61