Bad version number in .class

[ronnie8080]

Hello All,

I am working on JBoss Developer Studio 1.0.0.GA. I have been able to try out the jsp demo from the website. Now I am trying to develop a simple servlet but am getting

java.lang.UnsupportedClassVersionError: Bad version number in .class file
 at java.lang.ClassLoader.defineClass1(Native Method)
 at java.lang.ClassLoader.defineClass(Unknown Source)
 at java.security.SecureClassLoader.defineClass(Unknown Source)
 at java.net.URLClassLoader.defineClass(Unknown Source)
 at java.net.URLClassLoader.access$100(Unknown Source)

Here are my eclipse/JBDS settings

Preferences-Java-Installed JREs - jre1.5.0_15
Preferences-Server-Installed Runtimes - JBoss 4.2 Runtime - Edit - ...JRE - jre1.5.0_15

My JAVA_HOME points to C:\xxx\java\jdk1.5.0_15
My PATH var has .;C:\j2sdk1.4.2_04 in the beginning.

I am on Windows 2000.

Please help.
Thank you.
R

[maxandersen]

Sounds like you have some compiler settings set different than your runtime.

e.g. compiler settings set to Java5 but running with Java 1.4 would cause this.

Look under your projects properties for compiler compliancee level.

[ronnie8080]

Hi Max,

Thank you for the reply and pointing me in the correct direction.

I checked my compiler settings as you suggested and confirmed that everything there was indeed pointing to 5.0. After that I also tried changing Project Facets - Java - to 5.0 from 6.0 and that helped.

Thanks again.
R