java.awt.HeadlessException

[tanww]

Hi,

  I created a Clear button with the following actions:

   textfield1.setText("");
   textfield2.setText("");

  I deployed the application on glassfish appserver on both window and solaris servers.  I got an java.awt.HeadlessException from solaris server.  I've already added -Djava.awt.headless=true to the JVM option and System.setProperty("java.awt.headless", "true") to the code, but I still get the error message.  For windows server, no error message is display.  

  The funny thing is if I entered a text in both fields, then reload the webpage and click Clear, then no error message is displayed.  What did I do wrong? Or is this a bug in visual web?  Thanks for any help!

Regards,

Johnny

[Peter Zavadsky]

Hi,

You can check the HeadlessException javadoc. It says if the environment
doesn't support keyboard, or display or mouse it is thrown (when one of
those is attempted to be used), see:
http://java.sun.com/javase/6/docs/api/java/awt/HeadlessException.html

But to be sure the exception was not thrown by some other code (i.e.
misused), please, send the exception stack trace.
Thanks,

-Peter


tanww wrote:

> Hi,
>
>   I created a Clear button with the following actions:
>
>    textfield1.setText("");
>    textfield2.setText("");
>
>   I deployed the application on glassfish appserver on both window and
> solaris servers.  I got an java.awt.HeadlessException from solaris server.
> I've already added -Djava.awt.headless=true to the JVM option and
> System.setProperty("java.awt.headless", "true") to the code, but I still get
> the error message.  For windows server, no error message is display.  
>
>   The funny thing is if I entered a text in both fields, then reload the
> webpage and click Clear, then no error message is displayed.  What did I do
> wrong? Or is this a bug in visual web?  Thanks for any help!
>
> Regards,
>
> Johnny
>  

---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@...
For additional commands, e-mail: users-help@...

[tanww]

Hi Peter,

  Thanks for the reply.  For some reasons, I couldn't capture the exception stack trace.  The AWTException message is display in the application message field which I used for field validation.  There is no trace in the glassfish server log either.  I did add throws and try-catch statements in the method which  called from the button, but no help.

Regards,

Johnny

Peter Zavadsky wrote:

Hi,

You can check the HeadlessException javadoc. It says if the environment
doesn't support keyboard, or display or mouse it is thrown (when one of
those is attempted to be used), see:
http://java.sun.com/javase/6/docs/api/java/awt/HeadlessException.html

But to be sure the exception was not thrown by some other code (i.e.
misused), please, send the exception stack trace.
Thanks,

-Peter


tanww wrote:
> Hi,
>
>   I created a Clear button with the following actions:
>
>    textfield1.setText("");
>    textfield2.setText("");
>
>   I deployed the application on glassfish appserver on both window and
> solaris servers.  I got an java.awt.HeadlessException from solaris server.
> I've already added -Djava.awt.headless=true to the JVM option and
> System.setProperty("java.awt.headless", "true") to the code, but I still get
> the error message.  For windows server, no error message is display.  
>
>   The funny thing is if I entered a text in both fields, then reload the
> webpage and click Clear, then no error message is displayed.  What did I do
> wrong? Or is this a bug in visual web?  Thanks for any help!
>
> Regards,
>
> Johnny
>  


---------------------------------------------------------------------
To unsubscribe, e-mail: [e-mail]
For additional commands, e-mail: [e-mail]