0

I'm running a script that uses Eclipse and I am seeing this error:

Exception in thread "main" java.lang.UnsupportedClassVersionError: my/file/path/goes/here/CreateEcoreFile : 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)

Some googling led me to believe that I was perhaps trying to compile a Java 7 project with a Java 8 compiler. I have checked my system (Cent OS 6) and I only have Java 7 installed, I even downgraded my Eclipse to Neon 1.A and it's build path is Java 7.

$ java -version
java version "1.7.0_51"

What else can I do?

Karol Dowbecki
  • 43,645
  • 9
  • 78
  • 111
Jessica Chambers
  • 1,246
  • 5
  • 28
  • 56

1 Answers1

2

As per this answer version 52.0 means Java 8. Eclipse uses it's own ECJ compiler which is part of the IDE, which probably uses Java 8 as default.

Follow this guide and set the Java compiler version for your project to Java 7:

  1. Go to Window -> Preferences
  2. Go to Java -> Compiler
  3. Select Compiler compliance level
Karol Dowbecki
  • 43,645
  • 9
  • 78
  • 111