private void login(Label explainLabel) { String mail = mailInput.getText(), password = passwordInput.getText(); Player player = null; try { player = MainScreen.handler.loadPlayer(mail, password); } catch (Exception e1) { explainLabel.setText("Error connecting to server..."); e1.printStackTrace(); return; } if (player == null) { explainLabel.setText("User not found,\nCheck the Username or Password."); return; } Files.saveData(mail, password); MainScreen.setPlayer(player); goToFirstScreen(); }