LookAndFeel 1.1 with jEdit 4.2final -- "Cannot start...Unsupported major.minor" -- "Try updating..."

Submitted by Phrawm48 on Wednesday, 29 March, 2006 - 22:18

jEdit 4.2final, LookAndFeel plugin version 1.1, JRE 1.5.0_06.

Both the jEdit Plugin Manager and the the LookAndFeel plugin page (http://plugins.jedit.org/plugins/?LookAndFeel) tell me:

- Version 1.1 of LookAndFeel is the latest, greatest version

- Version 1.1 is intended for use with jEdit 4.2final

Despite this, if I install LookAndFeel 1.1 I receive the following "Plugin Error" message box when I start jEdit 4.2:

C:\Program Files\jEdit\jars\LookAndFeel.jar:
"Cannot start: java.lang.UnsupportedClassVersionError: lookandfeel/LookAndFeelPlugin (Unsupported major.minor version 49.0)
Try updating to a newer version of the plugin.

But as best I can tell there is no newer version of the plugin.

Any ideas?

Cheers & thanks,
Ric
SFO

Oh, and I've tried installing two different ways

by Phrawm48 on Wed, 29/03/2006 - 22:22

Regarding my earlier post about my problem with jEdit 4.2 and LookAndFeel 1.1:

I've also tried uninstalling and reinstalling, *both* via the jEdit Plugin Manager *and* by downloading and unpacking the LookandFeel .jar files into my jEdit jars directory.

Cheers & thanks,
Ric
SFO

JRE version

by nilojg on Thu, 18/05/2006 - 11:29

This seems to be a problem of JRE/JDK version. Probably the JDK version the plugin was compiled with is more recent than the JRE version you are using to run JEdit.

The plugin was compiled with JDK 1.4.2. You could try to upgrade your JDK/JRE to 1.5 and I'm sure the problem will be solved (and you'll get better performance)

EDITED and autocorrect **************

Well, probably the plugin is compiled with the same JDK version the other plugins, so if your JEdit works, surely LookAndFeel plugin works.

But, LookAndFeel is a little special plugin, because it uses other jar files, and if one of those jar files is compiled with a more recent JDK version than this you are using, you'll get the mayor-minor exception...

For example, I know that NimRODLookAndFeel (http://personales.ya.com/nimrod/) is compiled with JDK 1.4.2 because I've done that look and feel.

I keep thinking the fix is upgrade your JRE, but the cause is another one.

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