It seems your code does have a main(String[] args)
as we were discussing in your last question. As such, it might be as simple as changing:
<?xml version="1.0" encoding="UTF-8"?>
<jnlp spec="1.0+" codebase="http://fogest.com/java_example" href="">
<information>
<title>Launch applet with Web Start</title>
<vendor>Foo Bar Inc.</vendor>
<offline-allowed/>
</information>
<resources>
<j2se version="1.5+" href="http://java.sun.com/products/autodl/j2se"/>
<jar href="physics.jar" main="true" />
</resources>
<applet-desc
name="Physics" main-class="main.MainGame"
width="300" height="200">
</applet-desc>
<update check="background"/>
</jnlp>
To something like:
<?xml version="1.0" encoding="UTF-8"?>
<jnlp spec="1.0+" codebase="http://fogest.com/java_example" href="">
<information>
<title>Launch applet with Web Start</title>
<vendor>Foo Bar Inc.</vendor>
<offline-allowed/>
</information>
<resources>
<j2se version="1.5+" href="http://java.sun.com/products/autodl/j2se"/>
<jar href="physics.jar" main="true" />
</resources>
<application-desc main-class="main.MainGame">
</application-desc>
<update check="background"/>
</jnlp>
Note
- I did not validate either JNLP, but you should. I wrote JaNeLA for doing exactly that.
- Swing GUIs should be created & updated on the EDT. See Concurrency in Swing (especially the part on 'initial threads') for more details.
- This is an SSCCE based on the frame.
import java.awt.*;
import javax.swing.*;
public class MainGame {
public static final String NAME = "Physics - Projectile Motion Example";
public static final int HEIGHT = 160;
public static final int WIDTH = HEIGHT * 16 / 9;
public static final int SCALE = 4;
public MainGame() {
run();
}
public void run() {
JFrame frame = new JFrame(MainGame.NAME);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());
JPanel options = new JPanel();
options.add(new JLabel("Options"));
JPanel game = new JPanel();
game.add(new JLabel("Game"));
frame.setSize(new Dimension ( WIDTH * SCALE, HEIGHT * SCALE ));
frame.add(game, BorderLayout.CENTER);
frame.add(options, BorderLayout.SOUTH);
frame.setLocationRelativeTo(null);
frame.setResizable(false);
frame.setVisible(true);
}
public static void main(String[] args) {
new MainGame();
}
}