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    <p>I think your design is way off and that is why things are not working. I'm not quite sure how your non-abstract JPanels work, but consider making your parent JPanel something more along these lines:</p> <pre><code>import java.awt.*; import java.awt.event.*; import java.awt.image.BufferedImage; import javax.swing.*; public class MyPanel extends JPanel { private GraphicsEnvironment ge; private GraphicsDevice gs; private GraphicsConfiguration gc; private BufferedImage offScreen; public MyPanel(boolean visible) { super(); this.setLayout(new BorderLayout(640, 416)); // strange constants for this layout. this.setOpaque(false); this.setVisible(visible); ge = GraphicsEnvironment.getLocalGraphicsEnvironment(); gs = ge.getDefaultScreenDevice(); gc = gs.getDefaultConfiguration(); addComponentListener(new ComponentAdapter() { @Override public void componentResized(ComponentEvent e) { setUp(); } }); } @Override // don't make this public. Keep it protected like the super's // just draw in this method. Don't call other methods that create buffers // or draw to buffers. protected void paintComponent(Graphics g) { super.paintComponent(g); if (offScreen != null) { g.drawImage(offScreen, 0, 0, null); } } private void setUp() { offScreen = gc.createCompatibleImage(getSize().width, getSize().height, Transparency.TRANSLUCENT); } // draw to the buffer outside of the paintComponent // and then call repaint() when done public void upDateOffScreen() { // ?? offScreen.flush(); // I've never used this before, // so am not sure if you need this here Graphics2D osGraphics = offScreen.createGraphics(); // TODO: do drawing with osGraphics object here osGraphics.dispose(); repaint(); } } </code></pre> <p>Also and again,</p> <ul> <li>Do all long processing methods off of the EDT (Event Dispatch Thread).</li> <li>Never call Thread.sleep(...) on the EDT.</li> <li>Consider using Swing Timers instead of using Thread.sleep for the animations.</li> <li>It's OK to call repaint on your JPanel off of the EDT, but for the most part that's about it. </li> <li>All other Swing methods should be called on the EDT.</li> <li>Read, re-read, and study the 2D and Swing graphics tutorials.</li> </ul>
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    1. USHovercraft Full Of Eels
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    1. CO+1 i miss there using `javax.swing.Timer` istead of `Thread.sleep(int)` two craziest examples here http://stackoverflow.com/questions/7206122/swing-rate-limiting
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    2. COI used Swing Timers and that fixed the problem. It was because the repaint method wasn't being called/doing what it was supposed to. Probably because of that EDT you mentioned. But thank you very much. :)
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    3. COYou're welcome. Glad you've got it working!
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