bad version in class file

Question

When I use certain jars in one of the connector projects i write for lombardi in TeamWorks eclipse i get a bad class version exception...

any ideas how this might be

Answer 1

You will get this error if you are using (say) Java 1.5 and you are using a JAR compiled with Java 1.6.

The easiest way to resolve is to upgrade your version of Java to the one used by the JAR.

Answer 2

This is a result of running code compiled with a compiler version that is greater than the version of java you are using to run it. IE Code compiled with 1.6 and you are running it with 1.5. See this post to determine what version it was compiled with.

how-can-i-find-the-target-java-version-for-a-compiled-class

the easiest fix is to run it with the most recent JVM.

Answer 3

Try to compile/recompile all your stuff with the same compiler. Typically this happens when you have something compiled with a higher version and you try to run it with an older one.

Answer 4

This problem can also be caused by an expired (365-day) Android certificate referenced by Eclipse.

See "Debug certificate expired" error in Eclipse Android plugins for details.

Answer 5

Root Cause for this error is that: jars including in your project is complied from other version of java and you are compiling your project from other version of java simply upgrading version of java will resolve this problem.

I also faced the same problem.