UnsupportedClassVersionError - JDKs have same version

Question

I have taking an existing, old, Java code base and changed one class. I have recompiled the code base in Java 1.5.0. I then successfully deploy this code on Tomcat.

Answer 1

You have compiled your class using Java 6 and deploying application with lower version i.e. Java 5. Use Java 6 run time it will fix your problem.

“Caused by: java.lang.UnsupportedClassVersionError: (myclassname) bad major version at offset=6”

This error indicates that your projects were compiled with a higher level Java compiler than the runtime can support.