Unsupported major.minor version 52.0

[buhtz]

I just downloaded the last package and tried to start that under Lubuntu 14.04.3 LTS.

This is the result.

$ ./schemacrawler.sh Exception in thread "main" java.lang.UnsupportedClassVersionError: schemacrawler/Main : Unsupported major.minor version 52.0 at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:800) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) at java.net.URLClassLoader.defineClass(URLClassLoader.java:449) at java.net.URLClassLoader.access$100(URLClassLoader.java:71) at java.net.URLClassLoader$1.run(URLClassLoader.java:361) at java.net.URLClassLoader$1.run(URLClassLoader.java:355) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:354) at java.lang.ClassLoader.loadClass(ClassLoader.java:425) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308) at java.lang.ClassLoader.loadClass(ClassLoader.java:358) at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:482)

[schemacrawler]

Please make sure you are using Java 8. Run:

java -version

[buhtz]

I think you mean Java from Oracle/Sun? I am using OpenJDK.

java version "1.7.0_85" OpenJDK Runtime Environment (IcedTea 2.6.1) (7u85-2.6.1-5ubuntu0.14.04.1) OpenJDK Server VM (build 24.85-b03, mixed mode)

This should work. Did you build the version check or is it a automatism.?

[schemacrawler]

You have the wrong version of Java. Please use Java 8. Oracle Java is preferred, but any Java 8 would work.

[buhtz]

This is not supportet in Ubuntu 14.04.3 LTS.

[schemacrawler]

Please take a look at INSTALL ORACLE JAVA 8 IN UBUNTU OR LINUX MINT VIA PPA REPOSITORY JDK8

[buhtz]

Oracle/Sun Java isn't a choice because of security.