Java Programming

Hello,

I'm currently writing a little JApplet but it doesn't like to run correctly on some machines.
I tested several combinations of Windows 2000 and XP with FF2, Safari, IE6 and 7 and
some Opera I think too. All these run ok.
But on Linux Ubuntu 8.04 (unfortunatley brings FF3RC1, but also with Epiphany 2.22.2)
the Applet shows bad behaviour after reloading to page. And A friend also tells me that
was not able to run it on some MacOSX machine unsing Safari and FF ("gives a little
red cross").
So under Linux the Browser tells me either the Applet would be "bail", "notinited" or
even "dead". In the Java Console I can read things about an InterruptedException. And
there was also one time another exception about "Thread" and "dead" or something,
I cant remember exactly what it was and I can't bring up the same error message again.

So I made a little test applet:

import java.awt.*;
import java.awt.event.*;
import java.net.*;
import java.io.*;
import java.util.*;

import javax.swing.*;


public class testcase extends JApplet implements KeyListener, ActionListener
{
	public static final long serialVersionUID = 1L;

	JPanel panel1;
	JTextArea eingabe;

	public static void main(String[] args) {
		JApplet applet = new testcase();
		applet.init();
		final JFrame frame = new JFrame("TestCase");
		frame.setContentPane(applet.getContentPane());
		frame.addWindowListener(new WindowAdapter() { 
			public void windowClosing(WindowEvent e) {
				frame.dispose();
				System.exit(0);
			}
		});
		frame.setSize(600,600);
		frame.setLocation(0,0);
		frame.setVisible(true);
		applet.start();
	}
	public void build_window_layout() {
		panel1 = new JPanel();
		panel1.setLayout(new BorderLayout());
		eingabe=new JTextArea("moin");
		eingabe.addKeyListener(this);
		panel1.add(eingabe);
		getContentPane().add(panel1);
	}

	public void init() {
		System.out.println("init");
		build_window_layout();
	}
	
	public void start() {
	    System.out.println("start");
	}

	public void stop() {
	    System.out.println("stop");
	}

	public void destroy() {
	    System.out.println("destroy");
	}

	public void keyPressed(KeyEvent ev) { 
	    System.out.println("key pressed");
	}
	
	public void keyReleased(KeyEvent ev) {
	    System.out.println("key released");
	}
	
	public void keyTyped(KeyEvent ev) {
	    System.out.println("key typed");
	}

	public void actionPerformed(ActionEvent e) {
	    System.out.println("action");
	}

} 

I'd be happy if someone could give me a hint about where the problem is.

Thanks a lot,
your Leander

ps. most of the test machines run 1.6 only the Mac/Safari was on 1.5 afaik,
also the Mac/FF gave 1.6 as version info in the agent field of the httpd's log