Connection to mySQL via jdbc

Question

I'm currently programming a GUI to access a database. Therefore I executed a query, which worked fine. But when I tried to exit my program with
System.exit(0)my DOS-Prompt crashes without exiting.
Now I tried it with a kind of minimalistic Connection like that:
Class.forName("org.gjt.mm.mysql.Driver");
Connection conn = DriverManager.getConnection("jdbc:mysql://localhost/stock");     
conn.close();Here the same problem occurs, so it must be the Connection that causes the error.
If I would exit the program right away after the Connection, that is
Class.forName("org.gjt.mm.mysql.Driver");
Connection conn = DriverManager.getConnection("jdbc:mysql://localhost/stock");     
conn.close();
System.exit(0);then the program exits properly. Unfortunately it doesn't make any sense to quit the program right after reading the data.
So, as you can guess, I'm quite confused. I used the same driver and the same database in another program on the same computer, and it works fine. So I'm left totally clueless.
I'm not using a special programming environment, I just write my code using UltraEdit. I've got installed Java 1.4.0 on my machine.
Any help is very appreciated
Martin

Answer 1

I don't get any.
It just crashes. There's neither an exception thrown nor any other error msg.