JAXBContext jc = JAXBContext.newInstance(TrackingOrder.class);
Unmarshaller u = jc.createUnmarshaller();
Marshaller m = jc.createMarshaller();
m.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
try {
TrackingOrder tOrder = (TrackingOrder)u.unmarshal(new File("src/trackingData.xml"));
m.marshal(tOrder, System.out);
} catch(javax.xml.bind.UnmarshalException e){
System.out.println("Main: " + e);
}
}