JApplet - skift indhold i contentpane

Hej

Jeg vil gerne have min applet til at kunne skifte udseende/indhold, således at min bruger først for en login billed at se og hvis han/hun logger korrekt ind, skal brugeren se min jtable. Jeg har dog lidt problemer med at få lavet skift af visningen....

Min kode kommer her:

import java.awt.BorderLayout;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JApplet;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JScrollPane;
import javax.swing.JSplitPane;
import javax.swing.JTextField;

import dk.elopak.client.util.FormPanel;
import dk.elopak.server.Server;
import dk.elopak.server.data.ConverterServerDataView;
import dk.elopak.server.data.DefaultServerDataView;
import dk.elopak.server.data.FlameSealerServerDataView;

public class GUI extends JApplet {
   
    private FormPanel formPanel;
    private JPanel loginContainer;
    private JSplitPane dataContainer;
    private static DataTable dataTable = null;
    private static boolean isLoggedIn = false;
    public static JButton moveRowsBtn;
    private static final int COLUMNS_TEXTFIELD = 15;
    private JTextField txtUserName = new JTextField(COLUMNS_TEXTFIELD);
    private JPasswordField txtPassword = new JPasswordField(COLUMNS_TEXTFIELD);
    private JButton btnLogin = new JButton("Login");
    private boolean isLoginScreenVisible = true;
    private static DefaultServerDataView dsdv;


    public void paint(Graphics g) {super.paint(g);}
   
    public void start() {super.start();}
   
    public void stop() {super.stop();}
   
    public void destroy() {super.destroy();}
   
    public void init() {
        try {
            super.init();
            javax.swing.SwingUtilities.invokeAndWait(new Runnable() {
                public void run() {
                    loginContainer = new JPanel(new BorderLayout());
                    dataContainer = new JSplitPane(JSplitPane.VERTICAL_SPLIT);
                    txtUserName.setText("Jan");
                    txtPassword.setText("bugaboo");
                    createAndShowGUI();
                }
            });
        } catch (Exception e) {
            System.err.println("createGUI didn't successfully complete");
            e.printStackTrace();
        }
    }

    private ActionListener btnLoginActionListener = new ActionListener(){
        public void actionPerformed(ActionEvent e){
            if(!txtUserName.getText().equals("")){
                if (txtPassword.getPassword().length!=0){
                    boolean valid = Server.validateLogin(txtUserName.getText(), txtPassword.getPassword());
                    if(valid)switchView();
                }else{
                    displayError("You have to provide a password");
                    txtPassword.requestFocus();
                }
            }else{
                displayError("You have to provide a username");
                txtUserName.requestFocus();
            }
        }
    };

    public void createLoginView(){
        formPanel = new FormPanel();
        btnLogin.addActionListener(btnLoginActionListener);
        formPanel.addFrame("Login");
        formPanel.addComponents(txtUserName, "UserName");
        formPanel.addComponents(txtPassword, "Password");
        formPanel.addComponents(btnLogin);
        formPanel.closeFrame();
        formPanel.fillSpace();
        loginContainer.add(formPanel);
        loginContainer.setVisible(true);
    }

    public void createDataView(boolean isConverter){
        if(isConverter){
            ConverterServerDataView csdv = new ConverterServerDataView();
            setDataView(csdv);
            dataTable = new DataTable(csdv);           
        }else{
            FlameSealerServerDataView fssdv = new FlameSealerServerDataView();
            setDataView(fssdv);
            dataTable = new DataTable(fssdv);
        }
       
        JScrollPane scrollPane = new JScrollPane(dataTable);
        JPanel topPanel = new JPanel();
        String[] machineList = ((DefaultServerDataView)dataTable.getModel()).getMachineList();
        JComboBox machines = new JComboBox(machineList);
        JLabel lastUpdated = new JLabel();
        java.sql.Timestamp d = new java.sql.Timestamp(System.currentTimeMillis());
        lastUpdated.setText("Last updated : " + Server.getDateFormat().format(d));
        moveRowsBtn = new JButton("Move");
        moveRowsBtn.addActionListener(btnMoveActionListener);
        topPanel.add(machines);
        topPanel.add(lastUpdated);
        topPanel.add(moveRowsBtn);
        JPanel bottomPanel = new JPanel();   
        scrollPane.setViewportView(dataTable);
        bottomPanel.add(scrollPane);
        dataContainer.setDividerLocation(110);
        dataContainer.setEnabled(false);
        dataContainer.setLeftComponent(topPanel);
        dataContainer.setRightComponent(scrollPane);
        dataContainer.setVisible(true);
    }
   
    public void createAndShowGUI() { 
        if(!isLoggedIn){
            createLoginView();
            getContentPane().add(loginContainer, BorderLayout.CENTER);
        }else{
            getContentPane().add(dataContainer, BorderLayout.CENTER);
        }
    }