UIField Listener   

Hi fellow notes/java members.

I'm trying to utilise the DocumentFieldChangeEvent(NotesUIField oldField, NotesUIField newField) in the new Java 8.5.1 Java API to capture when a user has changed focus from field to field. I'm having trouble arranging the code to explicitly set the old and new field without eclipse throwing errors. Any help would be greatly appreciated! The following code took me while to derive from the api, but doesn't let me set the old and new field. Thanks in advance!:

uidoc.addFieldListener(new DocumentFieldListener() {

public void fieldChanged(DocumentFieldChangeEvent arg0) {

MessageDialog.openInformation(c.getShell(), "Star Wars",
arg0.getNewField().getText());
arg0.getNewField();
}

});