Could not load "plugins/AdminShop"

Hi,

I create the plugin AdminShop, players can sell their items with sign.

On my local server I don't have any error, but on my debian server, I've this error:

Code:

[LIST=1]
[*]17:11:09 [SEVERE] Could not load 'plugins/AdminShop.jar' in folder 'plugins'
[*]org.bukkit.plugin.InvalidPluginException: java.lang.UnsupportedClassVersionError: fr/emphytos/adminshop/AdminShop : Unsupported major.minor version 51.0
[*]        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:150)
[*]        at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:287)
[*]        at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:211)
[*]        at org.bukkit.craftbukkit.CraftServer.loadPlugins(CraftServer.java:207)
[*]        at org.bukkit.craftbukkit.CraftServer.reload(CraftServer.java:537)
[*]        at org.bukkit.Bukkit.reload(Bukkit.java:182)
[*]        at org.bukkit.command.defaults.ReloadCommand.execute(ReloadCommand.java:22)
[*]        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:166)
[*]        at org.bukkit.craftbukkit.CraftServer.dispatchCommand(CraftServer.java:469)
[*]        at org.bukkit.craftbukkit.CraftServer.dispatchServerCommand(CraftServer.java:465)
[*]        at net.minecraft.server.MinecraftServer.b(MinecraftServer.java:599)
[*]        at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:568)
[*]        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:452)
[*]        at net.minecraft.server.ThreadServerApplication.run(SourceFile:490)
[*]Caused by: java.lang.UnsupportedClassVersionError: fr/emphytos/adminshop/AdminShop : 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 org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:41)
[*]        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:29)
[*]        at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
[*]        at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
[*]        at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:334)
[*]        at java.lang.Class.forName0(Native Method)
[*]        at java.lang.Class.forName(Class.java:264)
[*]        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:139)
[*]        ... 13 more
[/LIST]

I really don't know why I've this error, my others plugins work !

Thanks

 

Your running the server in a Java 7 environment. Try running it in a JRE6

 

it's not because of the server, it's because he's using java 7 to build the plugin.