Here a link that explains the *java.lang.ClassFormatError*: http://craftingjava.blogspot.co.il/2012/07/reason-for-javalangclassformaterror.html
-------------------- "*this error would be thrown when the java virtual machine attempts to read a class file and founds that the class file has been altered in such a way that it loses its integrity.*" Here they are trying to say that *"if a class file has been modified in a complicated way then this error would be thrown." * There may be two possible ways a class file can get corrupted as far i know. 1.May be the compiler have some unresolved bugs in it. 2.The programmer may intentionally change the class file for some reasons. ---------------------- In your case this error does not seem to depend on your code. So, I can suggest you to use Oracle JDK instead OpenJDK, this because I had some problems using NetBeans and then I got that suggestion, that helped me. Angelo On Tue, Jan 27, 2015 at 1:35 AM, Kevin Cummings <cummi...@kjchome.homeip.net > wrote: > I updated to java-1.7.0-openjdk.x86_64 1:1.7.0.75-2.5.4.2.fc20 today > (along with the java-1.7.0-openjdk-headless and java-1.7.0-openjdk-devel > packages). After the upgrade, nothing java related would run. (not the > compiler, not the jar command, and I couldn't run any pre-built .jars.) > The error was: > > > Error occurred during initialization of VM > > java/lang/ClassFormatError: Unknown constant tag 99 in class file > java/lang/Class > > Downgrading back to java-1.7.0-openjdk.x86_64 1:1.7.0.60-2.4.3.0.fc20 et > al fixed the problem. > > -- > Kevin J. Cummings > kjch...@verizon.net > cummi...@kjchome.homeip.net > cummi...@kjc386.framingham.ma.us > Registered Linux User #1232 (http://www.linuxcounter.net/) > -- > users mailing list > users@lists.fedoraproject.org > To unsubscribe or change subscription options: > https://admin.fedoraproject.org/mailman/listinfo/users > Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct > Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines > Have a question? Ask away: http://ask.fedoraproject.org >
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