How can you add several elements to a JScrollPane

Question

So I am trying to add more than one element to a JScrollPane element but so far I haven't been able to pull it of. I can make it so that the first element shows up ,which in my case is a picture. But after adding in an extra panel to the JScrollPane ,the first element disappears and even the second element ,the new panel , doesnt show on my JScrollPane.

        JFrame scherm = new JFrame("t?");
    scherm.setVisible(true);
    scherm.setSize(300, 300);
    scherm.setLocationRelativeTo(null);
    scherm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    //
    String path = "C:\\Users\\Bernard\\Documents\\Paradox Interactive\\Crusader Kings II\\mod\\viking\\map\\provinces.bmp";
    Image image = ImageIO.read(new File(path));
    ImageIcon icon = new ImageIcon(image);


    JLabel label = new JLabel(icon);
    JScrollPane scroll = new JScrollPane(label);
    JPanel paneel2= new JPanel();
    paneel2.setSize(new Dimension(400,400));
    scroll.getViewport().add(paneel2,null);

    scherm.add(scroll);

Thank you for your time!

Answer 1

By doing this:

scroll.getViewport().add(paneel2,null);

You're trying to add a component to the scroll pane's JViewPort shown in the picture below:

This makes no sense. As stated in How to Use Scroll Panes trial:

A JScrollPane provides a scrollable view of a component.

This single component is the view port's view. So if you want to have more than a single component in your scroll pane you must to wrap all those components in a lightweight component such as JPanel and set this one as the scroll pane's view port view:

JPanel content = new JPanel();
content.add(label);
content.add(paneel2);

scroll.setViewportView(content);