Plugin or class not found error

[cihat eldeniz]

Hello,

I am designing a GUI-based plugin in SWT using Visual Editor 1.2.1 on
Eclipse 3.2 [Callisto].

The importing of ImageJ into Eclipse is quite usefully illustrated in
the Tutorials section of the ImageJ wiki. The problem I have is that
when I run the very simple "Hello World" program, things are all fine. I
can copy the output jar file into the plugins folder of imagej and it
works! However, when it comes to design a very simplistic GUI-based
plugin which has just one shell and only one button with no
functionality on the shell, unfortunately I could not get things
working. Firstly, when I go to run->debug within the visual editor,
ImageJ opens, I see the plugin in the plugins menu, I click, but there
is no answer. Secondly, I copy the jar file into the plugins folder of
full imagej, again I see it in the menu, but when I click, I get an
error message which says [assuming the name of the plugin is TEST_PLUGIN]

Plugin or class not found: TEST_PLUGIN
(java.lang.NoClassDefFoundError: org/eclipse/swt/widgets/Composite)

Any ideas? Your suggestions would be highly appreciated.

Thank you very much.

[Marcel]

Certainly related to this FAQ:

Q: Why do I get the error "java.lang.NoClassDefFoundError: org/eclipse/swt/internal/XXX/OS."?

And because you are using an older version of Eclipse read this, too.

Q: Why do I get the error "java.lang.UnsatisfiedLinkError: no swt-win32-3232 in java.library.path."?

Link: http://www.eclipse.org/swt/faq.php#missingjar

I hope this helps

[Joris FA Meys]

Hi,

Did you check the code generated with the Visual Editor? It might be that
the plugin does not have the right structure. I mean, the Visual Editor is
not likely to know it has to implement PlugIn etc etc. That's about the only
thing I can think about.

Kind regards
Joris

On Thu, Feb 5, 2009 at 1:59 AM, Cihat Eldeniz <[hidden email]>wrote:

> Hello,
>
> I am designing a GUI-based plugin in SWT using Visual Editor 1.2.1 on
> Eclipse 3.2 [Callisto].
>
> The importing of ImageJ into Eclipse is quite usefully illustrated in the
> Tutorials section of the ImageJ wiki. The problem I have is that when I run
> the very simple "Hello World" program, things are all fine. I can copy the
> output jar file into the plugins folder of imagej and it works! However,
> when it comes to design a very simplistic GUI-based plugin which has just
> one shell and only one button with no functionality on the shell,
> unfortunately I could not get things working. Firstly, when I go to
> run->debug within the visual editor, ImageJ opens, I see the plugin in the
> plugins menu, I click, but there is no answer. Secondly, I copy the jar file
> into the plugins folder of full imagej, again I see it in the menu, but when
> I click, I get an error message which says [assuming the name of the plugin
> is TEST_PLUGIN]
>
> Plugin or class not found: TEST_PLUGIN
> (java.lang.NoClassDefFoundError: org/eclipse/swt/widgets/Composite)
>
> Any ideas? Your suggestions would be highly appreciated.
>
> Thank you very much.
>