Technote Details :: Error in Eclipse when trying to use JSEclipse
Issue
When using JSEclipse versions prior to 1.5, after installing the plugin, Eclipse throws a ClassNotFoundError exception.
Reason
Releases of JSEclipse before version 1.5 require that JRE 1.5 is installed.
Solution
You should upgrade to the most recent version of JSEclipse which works with both JRE 1.4 and JRE 1.5.
Alternatively, if you wish to continue using your current version of JSEclipse, check to see if you have the correct version of JRE installed.
If you already have JRE 5.0, you might have an older installation of JRE 1.4 which eclipse is using. Try to uninstall both JREs and then install only JRE 5.0.
Download Java 2 Platform, Standard Edition 5.0
Note: that you only need the JRE 5.0 Update 6 package and not the whole JDK for JSEclipse.
