{"action":"opened","issue":{"url":"https://api.github.com/repos/Nukkit/Nukkit/issues/126","labels_url":"https://api.github.com/repos/Nukkit/Nukkit/issues/126/labels{/name}","comments_url":"https://api.github.com/repos/Nukkit/Nukkit/issues/126/comments","events_url":"https://api.github.com/repos/Nukkit/Nukkit/issues/126/events","html_url":"https://github.com/Nukkit/Nukkit/issues/126","id":120582653,"number":126,"title":"Canť run on Ubuntu","user":{"login":"kvetinac97","id":10753543,"avatar_url":"https://avatars.githubusercontent.com/u/10753543?v=3","gravatar_id":"","url":"https://api.github.com/users/kvetinac97","html_url":"https://github.com/kvetinac97","followers_url":"https://api.github.com/users/kvetinac97/followers","following_url":"https://api.github.com/users/kvetinac97/following{/other_user}","gists_url":"https://api.github.com/users/kvetinac97/gists{/gist_id}","starred_url":"https://api.github.com/users/kvetinac97/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/kvetinac97/subscriptions","organizations_url":"https://api.github.com/users/kvetinac97/orgs","repos_url":"https://api.github.com/users/kvetinac97/repos","events_url":"https://api.github.com/users/kvetinac97/events{/privacy}","received_events_url":"https://api.github.com/users/kvetinac97/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2015-12-05T19:44:35Z","updated_at":"2015-12-05T19:44:35Z","closed_at":null,"body":"I tried to run Nukkit with java -jar minetox/Nukkit.jar (or cd minetox and java -jar Nukkit.jar) on Ubuntu 15.10 and I got this error:\r\n\r\nException in thread \"main\" java.lang.UnsupportedClassVersionError: cn/nukkit/Nukkit : Unsupported major.minor version 52.0\r\n        at java.lang.ClassLoader.defineClass1(Native Method)\r\n        at java.lang.ClassLoader.defineClass(ClassLoader.java:800)\r\n        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)\r\n        at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)\r\n        at java.net.URLClassLoader.access$100(URLClassLoader.java:71)\r\n        at java.net.URLClassLoader$1.run(URLClassLoader.java:361)\r\n        at java.net.URLClassLoader$1.run(URLClassLoader.java:355)\r\n        at java.security.AccessController.doPrivileged(Native Method)\r\n        at java.net.URLClassLoader.findClass(URLClassLoader.java:354)\r\n        at java.lang.ClassLoader.loadClass(ClassLoader.java:425)\r\n        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)\r\n        at java.lang.ClassLoader.loadClass(ClassLoader.java:358)\r\n        at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:482)"}}