Question $3$

Add another class to Question $2,$ named RegistrationListReader, that can parse the XML formatted asset list using SAX, and create and return a list of Registration objects.

To test the RegistrationListReader class, modify the GUI in Question $2,$ to allow the list of Registrations to be read in so that they can be appended to the RegistrationList maintained by the application. Note that the user can request to read in the XML formatted file when there are Registrations, or none, in the RegistrationList. Use the standard fille dialog to assist the user in choosing the XML formatted file.