Unsupported major.minor version 51.0

[Chuck Irvine]

Hello,

I get this error when trying to run some sample code:

java.lang.UnsupportedClassVersionError: org/jose4j/lang/JoseException : Unsupported major.minor version 51.0

Any idea what the problem might be? I am running Java 1.6. Does the library support that version of Java?

[Chuck Irvine]

I was running Java 1.6 and the library requires 1.7.

[Brian Campbell]

Yeah, it requires 1.7 or 1.8.

There have been a couple forks of slightly older versions that I believe have back-ported to 1.6 - https://bitbucket.org/yosef_kitrossky/jose4j-jdk1.6/commits/all is the most recent but there's also https://bitbucket.org/ijazfx/jose4j/commits/all and you could probably do a back-port of the latest too without too much trouble.

[Chuck Irvine]

Thanks for the info, Brian. I’m going to try to get us upgraded to 1.7. It’s past time, anyway. Great looking library, BTW!! Thanks.

[Brian Campbell]

You are welcome and thanks for the kind words.