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Re: Please help me kill this java thread..... code example

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Thank you again! I think you are right about the a lock on the JVM by the scanner thread. 

One key point is that I am also tried setting the "exiting" variable in the shutdown method, which should stop the while loop of the scanner thread... but I don't think the thread is being woken in the shutdown, BUT then when I press the scan trigger, it wakes the thread and it sees that exiting is true, and THEN dies...

 private void shutdown(java.awt.event.ActionEvent evt) {                           
        existing=true;
        System.exit(0); 
    }                         

QUESTION: how do I wake the scanner thread from the event thread (shutdown) ... I tried notifyAll(), but I get an exception:
java.lang.IllegalMonitorStateException: current thread not owner

> 
>      Okay: I've come up with a fourth guess.  Perhaps exit() has in
> fact been called (and allowed), and the JVM is in the process of
> shutting down.  But perhaps shutdown cannot complete while the scanner
> code holds a lock or other resource (JNI?) that the JVM's shutdown
> needs before shutdown can complete.  Firing the scanner one last time
> might jar things loose.  (Remember: This is still just a guess.)
> 
>      The scanner code (in another thread you called it "the motorola
> sample program") is not known to me, so I can't say what it might be
> hanging on to.  Knute Johnson's suggestion of interrupting the thread
> might work, if the code is well-behaved (and doesn't, for example,
> just catch and ignore exceptions); I'd suggest giving it a try.  If
> that doesn't help -- well, you say you're using NetBeans, which means
> you have a debugger available; have you used it to find out what the
> threads are doing instead of exiting?

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Please help me kill this java thread..... code example kedward777@gmail.com - 2012-11-15 07:06 -0800
  Re: Please help me kill this java thread..... code example kedward777@gmail.com - 2012-11-15 07:09 -0800
    Re: Please help me kill this java thread..... code example Knute Johnson <nospam@knutejohnson.com> - 2012-11-15 08:42 -0800
  Re: Please help me kill this java thread..... code example Eric Sosman <esosman@comcast-dot-net.invalid> - 2012-11-15 11:49 -0500
    Re: Please help me kill this java thread..... code example kedward777@gmail.com - 2012-11-15 10:16 -0800
      Re: Please help me kill this java thread..... code example Eric Sosman <esosman@comcast-dot-net.invalid> - 2012-11-15 13:33 -0500
        Re: Please help me kill this java thread..... code example kedward777@gmail.com - 2012-11-15 10:56 -0800
          Re: Please help me kill this java thread..... code example Eric Sosman <esosman@comcast-dot-net.invalid> - 2012-11-15 14:21 -0500
  Re: Please help me kill this java thread..... code example Roedy Green <see_website@mindprod.com.invalid> - 2012-11-15 13:37 -0800

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