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NoClassDefFoundError: with GroupLayout

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I am not sure if this post should be in this forum, the applet forum, or the IDE forum so please bear with me. I’m trying to add some functionality via a JApplet to a legacy web app. The app is running jdk1.4 on Tomcat5.5. I have developed the applet in Neatbeans6.5 and it runs fine as a standalone applet. I’ve added the applet to the legacy app and when I try to open the applet I receive the following error:

java.lang.NoClassDefFoundError: org/jdesktop/layout/GroupLayout$Group
I’ve search the online and learned that I needed to add the swing –layout-1.0.3.jar to my project libraries in NetBeans, which I have done. I have also added the following to build.xml for when I distribute the war file to production:

I’ve restarted Tomcat and done a clean & build several times but I keep getting the same error. Any suggestions?

Thanks in advance,

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Any suggestions?

Don't use GroupLayout.

That is why most people recommend you build the GUI on your own so you are not reliant on a specific IDE or its custom classes.
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