CODEWITHSUNDEEP
javaswingjpaneljscrollpane
Mohammad Azaz
Mohammad Azaz

Reputation: 7

JScrollPane is not Working in JPanel

I have to use JScrollPane in my Project but it is not working.

enter image description here

I have pasted my code where I use a JSCrollPane in my main JPanel. 

frame = new JFrame();
        frame.setBounds(100, 100, 1179, 733);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.getContentPane().setLayout(null);

        JScrollPane scrollPane_1 = new JScrollPane();
        scrollPane_1.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
        scrollPane_1.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS);
        scrollPane_1.setBounds(0, 0, 1163, 694);
        frame.getContentPane().add(scrollPane_1);

        JPanel panel = new JPanel();
        scrollPane_1.setViewportView(panel);
        panel.setLayout(null);

Upvotes: 1

Views: 482

Answers (2)

PeaceIsPearl
PeaceIsPearl

Reputation: 339

I am not sure which layout you are using, but you need to set your panel layout something like this 

panel.setLayout(new FormLayout(
                        "default:grow",
                        "fill:default:grow"));

Upvotes: 0

Phil
Phil

Reputation: 306

Setting the layout to Null means you need to handle the placement manually --> Specify the pixel location and handle the size of the container.

A layout manager handles this placement for you. The manager calculates its preferred size based on its content. The ScrollPane uses this calculated size from the layout manager.

This means you should use a layout manager, place your components within it. The rest should work automatically.

 public static void main(String[] args) {
    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    frame.setSize(500, 500);

    JPanel panel = new JPanel();
    panel.setLayout(new GridLayout(30, 15));
    for (int row = 0; row < 30; row++) {
        for (int col = 0; col < 15; col++) {
            panel.add(new Button("Button" + row + "/" + col));
        }
    }

    frame.getContentPane().add(new JScrollPane(panel));
    frame.setVisible(true);
}

Upvotes: 2

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