How to hide the arrow buttons in a JScrollBar

Question

I need to hide the arrow buttons of java.awt.Scrollbar(VERTICAL) in an AWT application. Does anyone know how this can be achieved?

I saw an example here, but the cod

Answer 1

Using Nimbus Look and Feel you can use this to remove the arrow buttons:

    UIManager.getLookAndFeelDefaults().put(
        "ScrollBar:\"ScrollBar.button\".size", 0);
    UIManager.getLookAndFeelDefaults().put(
        "ScrollBar.decrementButtonGap", 0);
    UIManager.getLookAndFeelDefaults().put(
        "ScrollBar.incrementButtonGap", 0);

Here is a full example:

public class ScrollDemo extends JFrame {

    public ScrollDemo() {

        String[] columnNames = {"Column"};
        Object[][] data = {
                {"A"},{"B"},{"C"},{"D"},{"E"},{"F"},
                {"A"},{"B"},{"C"},{"D"},{"E"},{"F"},
                {"A"},{"B"},{"C"},{"D"},{"E"},{"F"},
                {"A"},{"B"},{"C"},{"D"},{"E"},{"F"},
                {"A"},{"B"},{"C"},{"D"},{"E"},{"F"},
        };

        add(new JScrollPane(new JTable(data, columnNames)));
        pack();
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        setVisible(true);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {

            @Override
            public void run() {

                try {
                    UIManager.setLookAndFeel("javax.swing.plaf.nimbus.NimbusLookAndFeel");
                } catch (Exception e) {
                    // No Nimbus
                }
                UIManager.getLookAndFeelDefaults().put(
                        "ScrollBar:ScrollBarThumb[Enabled].backgroundPainter",
                        new FillPainter(new Color(127, 169, 191)));
                UIManager.getLookAndFeelDefaults().put(
                        "ScrollBar:ScrollBarThumb[MouseOver].backgroundPainter",
                        new FillPainter(new Color(127, 169, 191)));
                UIManager.getLookAndFeelDefaults().put(
                        "ScrollBar:ScrollBarTrack[Enabled].backgroundPainter",
                        new FillPainter(new Color(190, 212, 223)));

                UIManager.getLookAndFeelDefaults().put(
                        "ScrollBar:\"ScrollBar.button\".size", 0);
                UIManager.getLookAndFeelDefaults().put(
                        "ScrollBar.decrementButtonGap", 0);
                UIManager.getLookAndFeelDefaults().put(
                        "ScrollBar.incrementButtonGap", 0);

                new ScrollDemo();
            }
        });
    }

}

Code for the Painter used:

public class FillPainter implements Painter {

    private final Color color;

    public FillPainter(Color c) { color = c; }

    @Override
    public void paint(Graphics2D g, JComponent object, int width, int height) {
        g.setColor(color);
        g.fillRect(0, 0, width-1, height-1);
    }

}