[Jabref-users] Problem with JabRef 3.1

[Haines B. <ha...@hi...>]

I was anxious to try out the Christmas special, JabRef 3.1. I did so
today, but received the following error:

 $ /usr/local/share/JabRef$ java -jar JabRef-3.1.jar
 Exception in thread "main" java.lang.UnsupportedClassVersionError:
 net/sf/jabref/JabRefMain : Unsupported major.minor version 52.0
  at java.lang.ClassLoader.defineClass1(Native Method)
  at java.lang.ClassLoader.defineClass(ClassLoader.java:643)
  at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)  
  at java.net.URLClassLoader.defineClass(URLClassLoader.java:277)
  at java.net.URLClassLoader.access$000(URLClassLoader.java:73)
  at java.net.URLClassLoader$1.run(URLClassLoader.java:212)
  at java.security.AccessController.doPrivileged(Native Method)
  at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
  at java.lang.ClassLoader.loadClass(ClassLoader.java:323)
  at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
  at java.lang.ClassLoader.loadClass(ClassLoader.java:268)
 Could not find the main class: net.sf.jabref.JabRefMain. Program will exit.

I suspect this is relevant:

 $ java -version
 java version "1.6.0_36"
 OpenJDK Runtime Environment (IcedTea6 1.13.8) (6b36-1.13.8-1~deb7u1)
 OpenJDK Server VM (build 23.25-b01, mixed mode)