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    <ul> <li>This is just an example for the final question: <ul> <li>Windows 7 (green progress bar)</li> <li>JDK 1.7.0_25 (WindowsLookAndFeel)</li> </ul></li> </ul> <p><img src="https://i.stack.imgur.com/iGvtq.png" alt="TurnProgressBarRedTest "></p> <pre><code>import java.awt.*; import java.awt.event.*; import java.awt.image.*; import java.beans.*; import javax.swing.*; import javax.swing.plaf.LayerUI; public class TurnProgressBarRedTest { public JComponent makeUI() { final BoundedRangeModel model = new DefaultBoundedRangeModel(); final BlockedColorLayerUI layerUI = new BlockedColorLayerUI(); final JPanel p = new JPanel(new GridLayout(4, 1, 12, 12)); p.setBorder(BorderFactory.createEmptyBorder(24,24,24,24)); final JProgressBar pb1 = new JProgressBar(model); pb1.setStringPainted(true); p.add(pb1); final JProgressBar pb2 = new JProgressBar(model); pb2.setStringPainted(true); p.add(pb2); p.add(new JProgressBar(model)); p.add(new JLayer&lt;JProgressBar&gt;(new JProgressBar(model), layerUI)); JPanel box = new JPanel(); box.add(new JButton(new AbstractAction("+10") { private int i = 0; @Override public void actionPerformed(ActionEvent e) { model.setValue(i = (i&gt;=100) ? 0 : i + 10); } })); //http://msdn.microsoft.com/en-us/library/windows/desktop/aa511486.aspx box.add(new JCheckBox(new AbstractAction( "&lt;html&gt;Turn the progress bar red&lt;br /&gt;"+ " when there is a user recoverable condition&lt;br /&gt;"+ " that prevents making further progress.") { @Override public void actionPerformed(ActionEvent e) { boolean b = ((JCheckBox)e.getSource()).isSelected(); pb2.setForeground(b? new Color(255,0,0,100) : pb1.getForeground()); layerUI.isPreventing = b; p.repaint(); } })); JPanel panel = new JPanel(new BorderLayout()); panel.add(p, BorderLayout.NORTH); panel.add(box, BorderLayout.SOUTH); return panel; } public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { @Override public void run() { createAndShowGUI(); } }); } public static void createAndShowGUI() { try { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); } catch(Exception e) { e.printStackTrace(); } JFrame f = new JFrame(); f.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); f.getContentPane().add(new TurnProgressBarRedTest().makeUI()); f.setSize(320, 240); f.setLocationRelativeTo(null); f.setVisible(true); } } class BlockedColorLayerUI extends LayerUI&lt;JProgressBar&gt; { public boolean isPreventing = false; private BufferedImage bi; private int prevw = -1; private int prevh = -1; @Override public void paint(Graphics g, JComponent c) { if(isPreventing) { JLayer jlayer = (JLayer)c; JProgressBar progress = (JProgressBar)jlayer.getView(); int w = progress.getSize().width; int h = progress.getSize().height; if(bi==null || w!=prevw || h!=prevh) { bi = new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB); } prevw = w; prevh = h; Graphics2D g2 = bi.createGraphics(); super.paint(g2, c); g2.dispose(); Image image = c.createImage( new FilteredImageSource(bi.getSource(), new RedGreenChannelSwapFilter())); g.drawImage(image, 0, 0, null); } else { super.paint(g, c); } } } class RedGreenChannelSwapFilter extends RGBImageFilter { @Override public int filterRGB(int x, int y, int argb) { int r = (int)((argb &gt;&gt; 16) &amp; 0xff); int g = (int)((argb &gt;&gt; 8) &amp; 0xff); int b = (int)((argb ) &amp; 0xff); return (argb &amp; 0xff000000) | (g&lt;&lt;16) | (r&lt;&lt;8) | (b); } } </code></pre>
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