GUI - Change contentpane when button pressed

[milk242]

Hi everyone

I'm trying to change what shows up in the contentpane depending on what button you press. Say you press a button labeled "Customer", it would add textfields to the content pane.

I thought I could just add the action int eh actionPerformed method but doesn't seem to work.

Thanks for your help!

public class ButtonDemo extends JFrame implements ActionListener
{
    public static final int WIDTH = 400;
    public static final int HEIGHT = 300;
    private JTextField nameField; 
 
    public ButtonDemo()
    {
        setSize(WIDTH, HEIGHT);
        WindowDestroyer listener = new WindowDestroyer();
        addWindowListener(listener);
 
        Container contentPane = getContentPane();
        contentPane.setBackground(Color.WHITE);
 
        contentPane.setLayout(new FlowLayout());
 
        JButton customerButton = new JButton("Customer");
        customerButton.addActionListener(this);
        contentPane.add(customerButton); 
    }
 
    public void actionPerformed(ActionEvent e)
    {
        String actionCommand = e.getActionCommand();
        Container contentPane = getContentPane();
 
        if (actionCommand.equals("Customer"))
        {
            nameField = new JTextField("Hi everyone");
            nameField.addActionListener(this);
            contentPane.add(nameField);
        }
        else
            System.out.println("Error in button interface.");
    }
}

[r035198x]

Call pack() after adding stuff to the content pane.

[milk242]

@r035198x
Sorry for the noob question but how would I do that? What would I put in the parameter of the Window header?

[r035198x]

After

contentPane.add(nameField);

add

pack();

[milk242]

Thanks for the help!
but...

Do you know where I can read up more of the pack method? It sort of does what I want but I'll have more than 1 button on the window, each button should populate the content pane with new fields. The pack() method displays the field and when I press the button again, it'll duplicate the fields. Also it breaks the set size of the window.

[r035198x]

Better read up on Layout managers again then.Perhaps you could use CardLayout for this?