bCheck.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                try {
                JOptionPane.showMessageDialog(null, tf.getText() + " - adres: " + aif.getAddress(tf.getText()));
                }catch(RemoteException r) {
                    System.out.println("remote exception");
                }
            }
        });