Problem While loading Plugin.

Hey. It's me again...

I've got a Problem while loading my Plugin. At localhost it works but not on the Server.. even not with a copyed spigot.jar

Here's the Code:

Code:

org.bukkit.plugin.InvalidPluginException: java.lang.UnsupportedClassVersionError: de/kimko/main/main : Unsupported major.minor version 52.0
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:135) ~[craftbukkit.jar:git-Spigot-c3e4052-1953f52]
at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:329) ~[craftbukkit.jar:git-Spigot-c3e4052-1953f52]
at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:251) [craftbukkit.jar:git-Spigot-c3e4052-1953f52]
at org.bukkit.craftbukkit.v1_10_R1.CraftServer.loadPlugins(CraftServer.java:297) [craftbukkit.jar:git-Spigot-c3e4052-1953f52]
at org.bukkit.craftbukkit.v1_10_R1.CraftServer.reload(CraftServer.java:744) [craftbukkit.jar:git-Spigot-c3e4052-1953f52]
at org.bukkit.Bukkit.reload(Bukkit.java:539) [craftbukkit.jar:git-Spigot-c3e4052-1953f52]
at org.bukkit.command.defaults.ReloadCommand.execute(ReloadCommand.java:25) [craftbukkit.jar:git-Spigot-c3e4052-1953f52]
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) [craftbukkit.jar:git-Spigot-c3e4052-1953f52]
at org.bukkit.craftbukkit.v1_10_R1.CraftServer.dispatchCommand(CraftServer.java:646) [craftbukkit.jar:git-Spigot-c3e4052-1953f52]
at org.bukkit.craftbukkit.v1_10_R1.CraftServer.dispatchServerCommand(CraftServer.java:632) [craftbukkit.jar:git-Spigot-c3e4052-1953f52]
at net.minecraft.server.v1_10_R1.DedicatedServer.aL(DedicatedServer.java:437) [craftbukkit.jar:git-Spigot-c3e4052-1953f52]
at net.minecraft.server.v1_10_R1.DedicatedServer.D(DedicatedServer.java:400) [craftbukkit.jar:git-Spigot-c3e4052-1953f52]
at net.minecraft.server.v1_10_R1.MinecraftServer.C(MinecraftServer.java:672) [craftbukkit.jar:git-Spigot-c3e4052-1953f52]
at net.minecraft.server.v1_10_R1.MinecraftServer.run(MinecraftServer.java:571) [craftbukkit.jar:git-Spigot-c3e4052-1953f52]
at java.lang.Thread.run(Unknown Source) [?:1.7.0_71]
Caused by: java.lang.UnsupportedClassVersionError: de/kimko/main/main : Unsupported major.minor version 52.0
at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.7.0_71]
at java.lang.ClassLoader.defineClass(Unknown Source) ~[?:1.7.0_71]
at java.security.SecureClassLoader.defineClass(Unknown Source) ~[?:1.7.0_71]
at java.net.URLClassLoader.defineClass(Unknown Source) ~[?:1.7.0_71]
at java.net.URLClassLoader.access$100(Unknown Source) ~[?:1.7.0_71]
at java.net.URLClassLoader$1.run(Unknown Source) ~[?:1.7.0_71]
at java.net.URLClassLoader$1.run(Unknown Source) ~[?:1.7.0_71]
at java.security.AccessController.doPrivileged(Native Method) ~[?:1.7.0_71]
at java.net.URLClassLoader.findClass(Unknown Source) ~[?:1.7.0_71]
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:101) ~[craftbukkit.jar:git-Spigot-c3e4052-1953f52]
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:86) ~[craftbukkit.jar:git-Spigot-c3e4052-1953f52]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_71]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_71]
at java.lang.Class.forName0(Native Method) ~[?:1.7.0_71]
at java.lang.Class.forName(Unknown Source) ~[?:1.7.0_71]
at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:64) ~[craftbukkit.jar:git-Spigot-c3e4052-1953f52]
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:131) ~[craftbukkit.jar:git-Spigot-c3e4052-1953f52]
... 14 more

 

@timtower How?
Idk how i could do this with the Server... i only got a Minecraft console and FTP access.

 

You have to install Java 8 on your device wich runs the server.

 

@projectwoosh @TryKimko
NO. You do not need to stall it. Just make sure you compile your plugin with Java 7.