Problem running Java applications on Lubuntu 12.10

[Aere Greenway]

On Sat, 2012-10-27 at 18:55 -0600, Aere Greenway wrote:

> On Sat, 2012-10-27 at 12:07 -0600, Aere Greenway wrote:
> > All:
> > 
> > I just noticed something running Java applications on Lubuntu 12.10, and
> > it probably didn't do it before the latest updates I installed today
> > (which included updates to the Java JRE/JDK's.  
> > 
> > When I run a Java application, there is no indication of it (or any of
> > its sub-windows) in the taskbar!  
> > 
> > The application is obviously there, and works, but it doesn't appear in
> > the taskbar.  
> > 
> > When the Java application shows a modal dialog box, that dialog box gets
> > window focus, but when you finish with it (the dialog is closed), the
> > main application does not get re-focused.  
> > 
> > I can't get to it via Alt-Tab.  The only application in the taskbar is
> > Evolution mail.  
> > 
> > The only way I can get back to my Java application main window, is to
> > actually click on the Java application's window, and I have to do that
> > every single time it uses a sub-window, which is a real pain!  
> > 
> > -- 
> > 
> > Sincerely,
> > Aere
> > 
> > 
> 
> All:
> 
> I have a bit more information on this problem.  
> 
> On one of my upgraded Lubuntu systems (12.04 to 12.10), I had installed
> specifically the open Java 6 JRE/JDK (instead of the default JRE/JDK,
> which in 12.10, is Open Java 7).  
> 
> On that machine (which doesn't have Open Java 7), everything is fine -
> the Java applications are displayed on the taskbar.  
> 
> So it appears to be a problem with Open Java 7.  
> 
> I did still more checking on the machines that had the problem.  
> 
> I found that the problem (no Java applications in the taskbar) was
> present after the upgrade, and before any Java updates.  
> 
> After applying the Java updates (to both Java 7 and Java 6), the problem
> was still there.  
> 
> So the problem was not introduced by the recent Java updates.  
> 
> Sincerely,
> Aere
> 
> 


All:


I have successfully worked-around this problem by removing the
default-jre and default-jdk packages, along with the specific open Java
7 packages.  

Of course, at some point, it will cause problems for me again when I
eventually have to use open Java 7.  

But maybe the problem will be fixed by then...

- Aere


Sincerely,
Aere
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