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copied!<p>You could use a glass pane for this and tell it to draw its image at a location that depends on the location of the viewport. For example:</p> <pre><code>import java.awt.BorderLayout; import java.awt.Color; import java.awt.Dimension; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.Point; import java.awt.RenderingHints; import java.awt.image.BufferedImage; import javax.swing.*; @SuppressWarnings("serial") public class ScrollImgGlass extends JPanel { private static final int BI_W = 40; private static final int BI_H = BI_W; private static final String[] DATA = { "One", "Two", "Three", "Four", "Five", "Six", "Seven", "Eight", "Nine", "Zero", "One", "Two", "Three", "Four", "Five", "Six", "Seven", "Eight", "Nine", "Zero", "One", "Two", "Three", "Four", "Five", "Six", "Seven", "Eight", "Nine", "Zero", "One", "Two", "Three", "Four", "Five", "Six", "Seven", "Eight", "Nine", "Zero" }; private BufferedImage img = null; private JViewport viewport; public ScrollImgGlass(JViewport viewport) { setOpaque(false); this.viewport = viewport; img = new BufferedImage(BI_W, BI_H, BufferedImage.TYPE_INT_ARGB); Graphics2D g2 = img.createGraphics(); g2.setColor(Color.red); g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); g2.fillOval(0, 0, BI_W, BI_H); g2.dispose(); } @Override protected void paintComponent(Graphics g) { Point vpLocation = viewport.getLocationOnScreen(); Point gpLocation = getLocationOnScreen(); int x = vpLocation.x - gpLocation.x; int y = vpLocation.y - gpLocation.y; super.paintComponent(g); if (img != null) { g.drawImage(img, x, y, this); } } private static void createAndShowGui() { JList<String> jList = new JList<String>(DATA); jList.setOpaque(false); JViewport viewport = new JViewport(); JScrollPane scrollpane = new JScrollPane(); scrollpane.setViewport(viewport); viewport.setView(jList); ScrollImgGlass glass = new ScrollImgGlass(viewport); JFrame frame = new JFrame("ScrollImg"); frame.setGlassPane(glass); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.getContentPane().add(scrollpane, BorderLayout.CENTER); // just to show that this works if the viewport is shifted over frame.getContentPane().add(Box.createRigidArea(new Dimension(20, 20)), BorderLayout.NORTH); frame.getContentPane().add(Box.createRigidArea(new Dimension(20, 20)), BorderLayout.WEST); frame.pack(); frame.setLocationByPlatform(true); frame.setVisible(true); glass.setVisible(true); } public static void main(String[] args) { SwingUtilities.invokeLater(new Runnable() { public void run() { createAndShowGui(); } }); } } </code></pre> <p>Which would display like:</p> <p><img src="https://i.stack.imgur.com/ztbPk.jpg" alt="enter image description here"></p>

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