CardLayout does not work

Question

I'm building a dynamic UI which has "x" number of labels and "x" no of fields. I'm able build the UI.
When I make a selection in the ComboBox the UI(labels and fields change). For this I'm using a cardlayout.
It does not seem to work.
AttributesPanel builds the UI(Labels, Fields)
import java.util.*;
import java.util.List;
import java.awt.event.*;
import java.awt.*;
import javax.swing.*;
public class AttributesPanel extends JPanel {
    private JTextField[] fields;
    private List attributes;
    public AttributesPanel(String templateName) throws Exception{
        JSeparator sep = new JSeparator();
        JButton okButton = new JButton("OK");
        JButton cancelButton = new JButton("Cancel");
        com.insignia.profileManagement.dataLoader.NewProfileMetaDataLoader loader = new com.insignia.profileManagement.dataLoader.NewProfileMetaDataLoader();
        attributes = loader.BuildAttributes(templateName);
        for(int i = 0; i< attributes.size(); i ++) {
          String attributename = (String)attributes.get(i);
          System.out.println("Names of the attribute: " +attributename);
        fields = new JTextField[attributes.size()];
        JLabel[] labels = new JLabel[attributes.size()];
        for(int i = 0; i< attributes.size(); i++) {
            labels[i] = new JLabel((String)attributes.get(i));
            fields[i] = new JTextField(15);
        GridBagLayout gb1 = new GridBagLayout();
        GridBagConstraints gbc = new GridBagConstraints();
        setLayout(gb1);
        gbc.anchor = GridBagConstraints.NORTHWEST;
        gbc.gridwidth = GridBagConstraints.REMAINDER;
        add(new JLabel("Assign Profile Template"), gbc);
        gbc.anchor = GridBagConstraints.NORTH;
        gbc.fill = GridBagConstraints.HORIZONTAL;
        gbc.insets = new Insets(0,0,10,0);
        add(sep, gbc);
        gbc.anchor = GridBagConstraints.WEST;
        gbc.insets = new Insets(0,0,0,0);
        for(int i = 0;i < attributes.size(); i ++){
            gbc.gridwidth = 1;
            add(labels[i] ,gbc);
            add(Box.createHorizontalStrut(10));
            gbc.gridwidth = GridBagConstraints.REMAINDER;
            add(fields,gbc);
JPanel buttonPanel = new JPanel();
buttonPanel.add(okButton);
buttonPanel.add(cancelButton);
gbc.anchor = GridBagConstraints.SOUTH;
gbc.insets = new Insets(15,0,0,0);
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.gridwidth = 7;
add(buttonPanel,gbc);
2nd class which calls AttributesPanel
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
import java.lang.*;
import java.util.*;
import java.util.List;
public class ProfileUI extends JPanel implements ActionListener{
private JPanel templatePanel;
JComboBox comboBox = new JComboBox();
private CardLayout cardLayout;
com.insignia.profileManagement.dataLoader.NewProfileMetaDataLoader loader = new com.insignia.profileManagement.dataLoader.NewProfileMetaDataLoader();
public ProfileUI() throws Exception {
templatePanel = new JPanel();
List templates = loader.BuildTemplates();
comboBox.addActionListener(this);
for(int i = 0; i< templates.size(); i ++) {
comboBox.addItem(templates.get(i));
//attributes = loader.BuildAttributes((String)templates.get(i));
templatePanel.add(comboBox);
List attributes = loader.BuildAttributes("Email Template");
// //creating no of card layouts.
cardLayout = new CardLayout();
JPanel mainCardPanel = new JPanel(cardLayout);
AttributesPanel[] cardPanels = new AttributesPanel[attributes.size()];
for (int i = 0; i < attributes.size(); i++) {
mainCardPanel.add(cardPanels[i], i);
// createCardPanel(cardPanels[i], (String)comboBox.getItemAt(i));
cardLayout.show(cardPanels[i], "" + i);
templatePanel.add(mainCardPanel);
//updateLabel(0);
cardLayout.show(cardPanels[0], "" + 0);
public void actionPerformed(ActionEvent e){
if(e.getSource() == comboBox) {
public static void main (String args []) throws Exception {
JFrame frame = new JFrame("ProfileUI");
JComponent newContentPane= new ProfileUI();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // use this or a
newContentPane.setOpaque(true); //content panes must be opaque
frame.setContentPane(newContentPane);
frame.setSize(400,390);
frame.setVisible(true);
//frame.setResizable(false);
thnx

Answer 1

Personally, I've had numerous issues with CardLayout -- I'd suggest you try CardPanel instead:
http://java.sun.com/products/jfc/tsc/articles/cardpanel/
- Fromage