Design question: Link data between JFrames

Question

Dear all,
I have a design question. I have this form in a JFrame where you can set an icon as a property. To achieve this, I have a "Set" button on the form which will open a new window with all the available icons. When you click an icon, I want the "icon" frame to be closed and the selected icon to be send to the original form. This is the way I do it now:
Interface :
public interface IconUpdate
public void updateIcon(Icon icon);
}Main frame with the "Set" button:
public class Test extends JFrame implements IconUpdate, ActionListener
    private Icon icon = null;
    public Test()
        // add button and actionlistener and that kind of stuff
    public void actionPerformed(ActionEvent e)
        if(e.getSource() == btnSetIcon)
            new IconFrame(this);
    public void updateIcon(Icon icon)
        this.icon = icon;
}The Icon frame:
public class IconFrame extends JFrame implements ActionListener
    IconUpdate parent = null;
    public IconFrame(IconUpdate parent)
        this.parent = parent;
        // Initialize table,"Pick" button etc.
    public void actionPerformed(ActionEvent e)
        if(e.getSource() == btnPick)
            parent.updateIcon((Icon)list.getSelectedValue());
            this.dispose();
}Maybe I made some spelling faults, but this is the way I implement it. Now my question is: is there another way to achieve my goal? If I have to create an interface for every "popup choose dialog" in my program, I have to create many of them. I know using a combobox in the main frame is an option, but I just want to use it this way. Can anyone tell me how I can rewrite this code to make it better / more professional?
Tx in advance!!!
Peter

Answer 1

I can think of a couple options:
1) Let IconFrame's constructor accept a Test parameter, instead of creating an interface.
2) Make IconFrame into a modal dialog & have it store the user's selection in a variable. Then when you show the dialog, your action listener will block until the user selects an icon. Then you can call "getSelectedIcon()" to retrieve his/her selection. This would be much like the JOptionPane.showXXX() methods, and probably the cleaner solution.