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kontalk / desktopclient-java

Kontalk official platform independent desktop client
https://www.kontalk.org
GNU General Public License v3.0
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"Unsupported major.minor version 52.0" #72

Closed agharbeia closed 8 years ago

agharbeia commented 8 years ago

I tried to run KontalkDesktop-3.1.1/KontalkDesktopApp.jar and I got: Exception in thread "main" java.lang.UnsupportedClassVersionError: org/kontalk/Kontalk : 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: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)

On Ubuntu 14.04.05 on Linux 4.2.0-35-generic and java version "1.7.0_111" OpenJDK Runtime Environment (IcedTea 2.6.7) (7u111-2.6.7-0ubuntu0.14.04.3) OpenJDK 64-Bit Server VM (build 24.111-b01, mixed mode)

daniele-athome commented 8 years ago

Kontalk needs Java 8 to run. https://github.com/kontalk/desktopclient-java#software-dependencies

abika commented 8 years ago

Error message: "Unsupported major.minor version 52.0" Reason: Java 8 required

Why can't they make error messages a bit more useful?