#2 Portable version don't start.

[Giorgos]

Here's konsole's output:

 >./Start_JSoko_Linux.sh
Exception in thread "main" java.lang.UnsupportedClassVersionError: de/sokoban_online/jsoko/JSoko : Unsupported major.minor version 52.0
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:803)
        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
        at java.net.URLClassLoader.defineClass(URLClassLoader.java:442)
        at java.net.URLClassLoader.access$100(URLClassLoader.java:64)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:354)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:348)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:347)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:312)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
        at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:482)
>

On Debian jessie x64 KDE.
java version "1.7.0_151"
OpenJDK Runtime Environment (IcedTea 2.6.11) (7u151-2.6.11-2~deb8u1)
OpenJDK 64-Bit Server VM (build 24.151-b01, mixed mode)

Installed version, works flawlessly.

[Matthias Meger]

JSoko needs Java 8 to run.
It's possible to use the deb-Installer which includes a Java 8 bundle.