1 send input from GUI to backend logic is not included in the GUI
2 the response message will be send from the backend no need to include it to GIU since the logic is the part of the backend plus what u have to do is calling the result from the backend. for instance, by using.
String signInResult = signInService.signIn(username, password).
JOptionPane.showMessageDialog(null, signInResult).
1 send input from GUI to backend logic is not included in the GUI
2 the response message will be send from the backend no need to include it to GIU since the logic is the part of the backend plus what u have to do is calling the result from the backend. for instance, by using.
String signInResult = signInService.signIn(username, password).