public LoyaltySchemeMenu() {



        dataFile = new File("C:\\Users/James/Downloads/CustomerLoyaltySchemeFullSolution/customerData.dat");
        readDataFromFile();
        listModel = new DefaultListModel();
        //customers = new CustomerData().createTestData();
        refreshListModel();
        initComponents();
    }

    public static void refreshListModel() {
        String[] names = customers.getCustomerNames();
        listModel.clear();

        for (String n : names) {
            listModel.addElement(n);
        }
    }

    private void readDataFromFile() {
        try {
            inputFile = new FileInputStream(dataFile);
            objectInput = new ObjectInputStream(inputFile);
            customers = (CustomerList) objectInput.readObject();
            objectInput.close();
        } catch (IOException e) {
            JOptionPane.showMessageDialog(this, e.getMessage(),
                    "Cannot read from file", JOptionPane.ERROR_MESSAGE);
        } catch (ClassNotFoundException e) {


            e.printStackTrace();
        }
    }

    private void writeDataToFile() {
        try {
            outputFile = new FileOutputStream(dataFile);
            objectOutput = new ObjectOutputStream(outputFile);
            objectOutput.writeObject(customers);
            objectOutput.flush();
            objectOutput.close();
        } catch (IOException e) {
            JOptionPane.showMessageDialog(this, e.getMessage(),
                    "Cannot Write to File", JOptionPane.ERROR_MESSAGE);
        }
    }

    private void deleteCustomer() {

        int position = custListbox.getSelectedIndex();
        if (position == -1) {
            JOptionPane.showMessageDialog(this,
                    "Please select a customer",
                    "No selection", JOptionPane.ERROR_MESSAGE);

        } else {
            int confirm = JOptionPane.showConfirmDialog(this,
                    "Are you sure you want to delete "
                    + customers.getCustomerAt(position).getFullName(),
                    "Confirm delete", JOptionPane.YES_NO_OPTION);
            if (confirm == JOptionPane.YES_OPTION) {
                customers.removeCustomerAt(position);
                refreshListModel();
                clearMainForm();
            }
        }



    }

    private void clearMainForm() {

        nameField.setText("");
        telField.setText("");
        emailField.setText("");
        curPointsField.setText("");
        ltPointsField.setText("");
    }

    public static void refreshDetails() {

        nameField.setText(selected.getFullName());
        telField.setText(selected.getPhoneNo());
        emailField.setText(selected.getEmailAddress().getAddress());
    }

    public static void updatePointsFields() {

        LoyaltySchemeMenu.curPointsField.setText(Integer.toString(LoyaltySchemeMenu.selected.getCurrentPoints()));
        LoyaltySchemeMenu.ltPointsField.setText(Integer.toString(LoyaltySchemeMenu.selected.getLifetimePoints()));
    }