Thread Subject: Java Exception Object

We have a Matlab application that uses Java to connect to some
hardware. The Java code can throw an exception which Matlab converts
to a Matlab exception which is pretty much just the text. We don't
see any way to recover the contents of the Java Exception Object which
contians useful information about what happened. Does anyone have any
suggestions?

rt

Here is what you could do to tap into the java Exception:

try
   ...
catch,
   s = lasterror();
   emsg = {''; ['Java Exception has been caught:'];
s.message; ''};
   for i=1:size(s.stack,1),
      emsg = [emsg; [s.stack(i).file '::' s.stack(i).name
'() at ' num2str(s.stack(i).line)]];
   end
   if size(s.stack,1) > 0,
      emsg = [emsg; ''];
   end
   dialogPanel(fig.ubsMain.figure,'Error',emsg); % display
error in a dialog panel
end;

rtServo <noone@nowhere.com> wrote in message
<c6i1l3p6tdhg3q98mpf2jqp5i5i80vd76h@4ax.com>...
> We have a Matlab application that uses Java to connect to some
> hardware. The Java code can throw an exception which
Matlab converts
> to a Matlab exception which is pretty much just the text.
 We don't
> see any way to recover the contents of the Java Exception
Object which
> contians useful information about what happened. Does
anyone have any
> suggestions?
>
> rt

Here is what you could do to tap into the java Exception:

try
   ...
catch,
   s = lasterror();
   emsg = {''; ['Java Exception has been caught:'];
s.message; ''};
   for i=1:size(s.stack,1),
      emsg = [emsg; [s.stack(i).file '::' s.stack(i).name
'() at ' num2str(s.stack(i).line)]];
   end
   if size(s.stack,1) > 0,
      emsg = [emsg; ''];
   end
   dialogPanel(fig.ubsMain.figure,'Error',emsg); % display
error in a dialog panel
end;

rtServo <noone@nowhere.com> wrote in message
<c6i1l3p6tdhg3q98mpf2jqp5i5i80vd76h@4ax.com>...
> We have a Matlab application that uses Java to connect to some
> hardware. The Java code can throw an exception which
Matlab converts
> to a Matlab exception which is pretty much just the text.
 We don't
> see any way to recover the contents of the Java Exception
Object which
> contians useful information about what happened. Does
anyone have any
> suggestions?
>
> rt

On Mon, 3 Dec 2007 23:47:57 +0000 (UTC), "Ed Yu" <ekyu88@hotmail.com>
wrote:

>Here is what you could do to tap into the java Exception:
>
>try
> ...
>catch,
> s = lasterror();
> emsg = {''; ['Java Exception has been caught:'];
>s.message; ''};
> for i=1:size(s.stack,1),
> emsg = [emsg; [s.stack(i).file '::' s.stack(i).name
>'() at ' num2str(s.stack(i).line)]];
> end
> if size(s.stack,1) > 0,
> emsg = [emsg; ''];
> end
> dialogPanel(fig.ubsMain.figure,'Error',emsg); % display
>error in a dialog panel
>end;
>
>rtServo <noone@nowhere.com> wrote in message
><c6i1l3p6tdhg3q98mpf2jqp5i5i80vd76h@4ax.com>...
>> We have a Matlab application that uses Java to connect to some
>> hardware. The Java code can throw an exception which
>Matlab converts
>> to a Matlab exception which is pretty much just the text.
> We don't
>> see any way to recover the contents of the Java Exception
>Object which
>> contians useful information about what happened. Does
>anyone have any
>> suggestions?
>>
>> rt

Thanks Ed, but that does not get the Java exception object, but rather
it only supplies the exception message string and the call stack.
There is lots more information in the object itself.

rt