Exception in thread "main" java.lang.UnsupportedClassVersionError

[codinkai]

Hi,

I would like to try this package. Unfortunately I get the following error, when I run the example code or the command line tool.
Can anyone help?

ccjs lib/File.js
Exception in thread "main" java.lang.UnsupportedClassVersionError: com/google/javascript/jscomp/CommandLineRunner : Unsupported major.minor version 51.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:634)
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$1.run(URLClassLoader.java:212)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
Could not find the main class: com.google.javascript.jscomp.CommandLineRunner. Program will exit.

[dcodeIO]

This looks like a bug in closure compiler itself or some sort of corrupted .jar to me. Have you tried to reinstall the package entirely?

[codinkai]

I have tried it with a local and a global installation of the package. Both do not work. We use the compiler on another project. Can this cause a conflict?
How do I get an non-corrupted version of the compiler? Can I just download it from the official page and replace it? Or are there any neccessary changes in the compiler from this project?

[dcodeIO]

Yes, you can download it from the official page and put the compiler.jar into the ./compiler directory. Let me know if this works.

http://dl.google.com/closure-compiler/compiler-latest.zip

[codinkai]

Unfortunately this did not work. But I tried an older compiler.jar which I use on another project and it works. Perhaps it's because of my Java version.

java version "1.6.0_27"
OpenJDK Runtime Environment (IcedTea6 1.12.5) (suse-36.2-x86_64)
OpenJDK 64-Bit Server VM (build 20.0-b12, mixed mode)

java -jar compiler.old.jar --version
Closure Compiler (http://code.google.com/closure/compiler)
Version: exported
Built on: 2013/02/28 16:05

java -jar compiler.original.jar --version
Exception in thread "main" java.lang.UnsupportedClassVersionError: com/google/javascript/jscomp/CommandLineRunner : Unsupported major.minor version 51.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:634)
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$1.run(URLClassLoader.java:212)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
Could not find the main class: com.google.javascript.jscomp.CommandLineRunner. Program will exit.

Should the compiler complain about wrong type annotations? Or how can I enable this feature?

[dcodeIO]

Have you tried to install the official sun / openjdk 7 runtime instead?

[codinkai]

No, I haven't. I have only tried to run it with openSuse's java-package. Previous version did work with that package. Seems like it's not working anymore with the current version. Will try it later.

[dcodeIO]

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