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POSwing timer - time fluctuating
 

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    <p>I am using a Swing Timer in my game but when the game is running it appears to have moments when it runs smoothly and moments when it slows down. </p> <p>Why is the time fluctuating? </p> <p>And how do I fix it?</p> <pre><code>import java.awt.Color; import java.awt.Graphics; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.Timer; public class Main extends JFrame { public Main() { super("JFrame"); // you can set the content pane of the frame // to your custom class. setContentPane(new ImagePanel()); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setSize(800, 400); setResizable(false); setVisible(true); } public static void main(String[] args) { // TODO Auto-generated method stub new Main(); } class ImagePanel extends JPanel { Timer movementtimer; int x, y; public ImagePanel() { x = 0; y = 0; movementtimer = new Timer(12, new ActionListener() { public void actionPerformed(ActionEvent e) { long timstarted = System.currentTimeMillis(); moveImage(); repaint(); long timefinished = System.currentTimeMillis() - timstarted; System.out.println(timefinished + " to run"); }; }); movementtimer.start(); } public void moveImage() { x++; y++; if (x &gt; 800) { x = 0; } if (y &gt; 400) { y = 0; } } public void paintComponent(Graphics g) { super.paintComponent(g); g.setColor(Color.RED); g.fillRect(0, 0, 800, 400); g.setColor(Color.BLUE); g.fillRect(x, y, 50, 50); } } } </code></pre> <p>Here is an example of my code. In my actual program I am drawing Images and not just a rectangle. There is also a lot of collision detection and other small calculations happening.</p> <p>Also, here is a link to the Jar file for the game so you can run it and (hopefull) see what I mean. <a href="http://dl.dropbox.com/u/8724803/Get%20To%20The%20Chopper%201.3.jar" rel="nofollow">http://dl.dropbox.com/u/8724803/Get%20To%20The%20Chopper%201.3.jar</a></p> <p>Thanks</p> <p>Tom</p>
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    1. COBTW - I could not understand the logic of your timing calculations. Make `long timstarted;` an attribute of the `ActionListener` class and you might see what I am seeing - consistent 12s & 13s.
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      1. USAndrew Thompson
 

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