StackOverflow2013

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2013-05-29T17:48:34.253
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2013-05-29T17:48:34.253
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<ol> <li>Move the timer out of paintcomponent.</li> <li>You have declared an abstract class that has a draw method that needs a <code>Graphics2D</code> object to be able to draw, it has no access to it. It also makes little sense to declare a class just to hold two values (screensize and location) if that class also does stuff like drawing.</li> <li>To fix the issues with 2, you can either let your <code>gladiator</code> extend <code>JComponent</code>, override its <code>paintcomponent</code> and place your <code>draw()</code> code in there and add gladiator to the panel as a component.</li> <li>You can alternatively do active rendering, which means that you get the <code>Graphic2D</code> object of your canvas (the panel in this case) and take control of the rendering yourself instead of relying on swing.</li> </ol> Since you are working with swing I will give you a working example of what you probably intend to do. If you have more specific questions please do leave a comment. <pre><code>public class Test extends JPanel { public static abstract class graphic extends JComponent { public Dimension dim = new Dimension(500, 500); private int[] loc = new int[] { 250, 250 }; @Override @Transient public Dimension getPreferredSize() { return new Dimension(500, 500); } public int[] getLoc() { return loc; } public Dimension getDim() { return dim; } } public static class gladiator extends graphic { @Override protected void paintComponent(Graphics g) { super.paintComponent(g); Graphics2D g2d = (Graphics2D) g.create(); g2d.setColor(Color.green); g2d.fillArc(getLoc()[0], getLoc()[1], 100, 100, 45, 90); g2d.setColor(Color.black); g2d.fillArc((getLoc()[0] + 50 - 10), (getLoc()[1] + 50 - 10), 20, 20, 0, 360); } } public static void main(String[] args) { JFrame frame = new JFrame(); Test canvas = new Test(); gladiator gladiator = new gladiator(); canvas.add(gladiator); frame.getContentPane().add(canvas); frame.pack(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setLocationRelativeTo(null); frame.setVisible(true); } } </code></pre> This renders <img src="https://i.stack.imgur.com/bVCie.png" alt="enter image description here">
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