java.lang.UnsupportedClassVersionError

[SEVERE] Could not load 'plugins\MessagesAdvanced.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.UnsupportedClassVersionError: me/FTWin01Gurl/MessagesAdvanced/MessagesAdvanced : Unsupported major.minor version 51.0
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:151)
at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:305)
at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:230)
at org.bukkit.craftbukkit.CraftServer.loadPlugins(CraftServer.java:213)
at org.bukkit.craftbukkit.CraftServer.<init>(CraftServer.java:189)
at net.minecraft.server.ServerConfigurationManager.<init>(ServerConfigurationManager.java:53)
at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:166)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:432)
at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)
Caused by: java.lang.UnsupportedClassVersionError: me/FTWin01Gurl/MessagesAdvanced/MessagesAdvanced : Unsupported major.minor version 51.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(Unknown Source)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$000(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
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(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:140)

plugin.yml (open) plugin.yml (close)

name: MessagesAdvanced
author: FTWin01Gurl
main: me.FTWin01Gurl.MessagesAdvanced.MessagesAdvanced
version: 1.0
softdepend: [PermissionsEx]
commands:
pmto:
description: Private messages a message to a player
aliases: [tell, msg]
usage: |
I believe that the correct usage is: /pm [player] [message]
permission: messagesadvanced.user.pm
pmmode:
description: Enter a PM mode to a player
usage: |
I believe that the correct usage is: /pmmode [player] <-false, -true>
permission: messagesadvanced.user.mode
reload:
description: Reloads the plugin
usage: |
I believe that the correct usage is: /msgadvreload
permission: messagesadvanced.admin.reload
spytoggle:
description: Toggles spying mode
usage: |
I believe that the correct usage is: /msgadvspy <-true, -false>
permission: messagesadvanced.admin.spy
permissions:
messagesadvanced.*:
description: All access. Not recommended
default: false
children:
messagesadvanced.user.*: true
messagesadvanced.admin.*: true
messagesadvanced.user.*:
description: All access to user commands that don't affect the plugin.
default: true
children:
messagesadvanced.user.pm: true
messagesadvanced.user.mode: true
messagesadvanced.admin.*:
description: All access to admin commands. Be careful with this node
default: false
children:
messagesadvanced.admin.reload: true
messagesadvanced.admin.spy: true
messagesadvanced.user.pm:
description: Private messages a message to a player
default: true
messagesadvanced.user.pmmode:
description: Enter a PM mode to a player
default: true
messagesadvanced.admin.reload:
description: Reloads the plugin
default: false
messagesadvanced.admin.spy:
description: Allows the player to spy as well toggle
default: op

Where do I go so wrong? I can't seem to fix the issue. Tried five times.

 

compile whit jdk 6 instead of 7

 

Alright, thanks. I'll credit you.

Wait, how do you compile with JDK 6? I don't have that option?

 

This is how you learn how to compile with java 6: <Edit by Moderator: Redacted bit url>

 

PhobicGullMC
Way to necro-post, you'd assume within the year she would've figured it out.