Java Exception Object
in [Matlab]
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From: John VanLaanen on 17 Mar 2010 16:23 This is an old post, but I haven't seen if the question ever got answered and I've run into the same issue - is there any way to get access to Java's exception object when a Java exception happens in Matlab? Thanks! rtServo <noone(a)nowhere.com> wrote in message <953cl3lfn36st9elhp9c4d39j8neck5ne7(a)4ax.com>... > On Mon, 3 Dec 2007 23:47:57 +0000 (UTC), "Ed Yu" <ekyu88(a)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(a)nowhere.com> wrote in message > ><c6i1l3p6tdhg3q98mpf2jqp5i5i80vd76h(a)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
From: Yair Altman on 17 Mar 2010 17:37 "John VanLaanen" <john.vanlaanen(a)wdc.com> wrote ... > is there any way to get access to Java's exception object when a Java exception happens in Matlab? IFF the exception occurred on the main Matlab processing thread, you can trap it using the standard try-catch Matlab mechanism and examine (& possibly string-parse) the error object. However, if the exception happened on another, asynchronous thread (e.g., the GUI EDT), you're out of luck... More on EDT in Matlab: http://undocumentedmatlab.com/blog/matlab-and-the-event-dispatch-thread-edt/ Yair Altman http://UndocumentedMatlab.com
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