Bukkit

What steps will reproduce the problem?
1.Cargar el plugin

What is the expected output? What do you see instead?
Un mensaje de error

What version of the product are you using?
v1.0.1

Do you have an error log of what happened?

[20:43:01] [Server thread/ERROR]: Could not load 'plugins/LibelulaAutoShop.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.UnsupportedClassVersionError: me/libelula/autoshop/Main : Unsupported major.minor version 52.0
    at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:135) ~[Spigot.jar:git-Spigot-2ec6f06-7722428]
    at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:329) ~[Spigot.jar:git-Spigot-2ec6f06-7722428]
    at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:251) [Spigot.jar:git-Spigot-2ec6f06-7722428]
    at org.bukkit.craftbukkit.v1_8_R2.CraftServer.loadPlugins(CraftServer.java:291) [Spigot.jar:git-Spigot-2ec6f06-7722428]
    at net.minecraft.server.v1_8_R2.DedicatedServer.init(DedicatedServer.java:199) [Spigot.jar:git-Spigot-2ec6f06-7722428]
    at net.minecraft.server.v1_8_R2.MinecraftServer.run(MinecraftServer.java:522) [Spigot.jar:git-Spigot-2ec6f06-7722428]
    at java.lang.Thread.run(Thread.java:745) [?:1.7.0_79]
Caused by: java.lang.UnsupportedClassVersionError: me/libelula/autoshop/Main : Unsupported major.minor version 52.0
    at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.7.0_79]
    at java.lang.ClassLoader.defineClass(ClassLoader.java:800) ~[?:1.7.0_79]
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) ~[?:1.7.0_79]
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:449) ~[?:1.7.0_79]
    at java.net.URLClassLoader.access$100(URLClassLoader.java:71) ~[?:1.7.0_79]
    at java.net.URLClassLoader$1.run(URLClassLoader.java:361) ~[?:1.7.0_79]
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355) ~[?:1.7.0_79]
    at java.security.AccessController.doPrivileged(Native Method) ~[?:1.7.0_79]
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354) ~[?:1.7.0_79]
    at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:101) ~[Spigot.jar:git-Spigot-2ec6f06-7722428]
    at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:86) ~[Spigot.jar:git-Spigot-2ec6f06-7722428]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:425) ~[?:1.7.0_79]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:358) ~[?:1.7.0_79]
    at java.lang.Class.forName0(Native Method) ~[?:1.7.0_79]
    at java.lang.Class.forName(Class.java:274) ~[?:1.7.0_79]
    at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:64) ~[Spigot.jar:git-Spigot-2ec6f06-7722428]
    at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:131) ~[Spigot.jar:git-Spigot-2ec6f06-7722428]

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