InvalidPluginException, Can someone help?

Hey Guys, So this is what's going on with some of the Bukkit Plugins I download. It keeps on telling me something like this


[08:12:09 ERROR]: Could not load 'plugins/ExtremeRun.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.UnsupportedClassVersionError: de/xkia/xrun/Core : Unsupported major.minor version 51.0
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:131) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.3-66-g43d8943-b3078jnks]
at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:328) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.3-66-g43d8943-b3078jnks]
at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:251) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-66-g43d8943-b3078jnks]
at org.bukkit.craftbukkit.v1_7_R3.CraftServer.loadPlugins(CraftServer.java:357) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-66-g43d8943-b3078jnks]
at org.bukkit.craftbukkit.v1_7_R3.CraftServer.<init>(CraftServer.java:319) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-66-g43d8943-b3078jnks]
at net.minecraft.server.v1_7_R3.PlayerList.<init>(PlayerList.java:68) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-66-g43d8943-b3078jnks]
at net.minecraft.server.v1_7_R3.DedicatedPlayerList.<init>(SourceFile:14) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-66-g43d8943-b3078jnks]
at net.minecraft.server.v1_7_R3.DedicatedServer.init(DedicatedServer.java:126) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-66-g43d8943-b3078jnks]
at net.minecraft.server.v1_7_R3.MinecraftServer.run(MinecraftServer.java:436) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-66-g43d8943-b3078jnks]
at net.minecraft.server.v1_7_R3.ThreadServerApplication.run(SourceFile:628) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-66-g43d8943-b3078jnks]
Caused by: java.lang.UnsupportedClassVersionError: de/xkia/xrun/Core : Unsupported major.minor version 51.0
at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.6.0_65]
at java.lang.ClassLoader.defineClassCond(ClassLoader.java:637) ~[?:1.6.0_65]
at java.lang.ClassLoader.defineClass(ClassLoader.java:621) ~[?:1.6.0_65]
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141) ~[?:1.6.0_65]
at java.net.URLClassLoader.defineClass(URLClassLoader.java:283) ~[?:1.6.0_65]
at java.net.URLClassLoader.access$000(URLClassLoader.java:58) ~[?:1.6.0_65]
at java.net.URLClassLoader$1.run(URLClassLoader.java:197) ~[?:1.6.0_65]
at java.security.AccessController.doPrivileged(Native Method) ~[?:1.6.0_65]
at java.net.URLClassLoader.findClass(URLClassLoader.java:190) ~[?:1.6.0_65]
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:77) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.3-66-g43d8943-b3078jnks]
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:62) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.3-66-g43d8943-b3078jnks]
at java.lang.ClassLoader.loadClass(ClassLoader.java:306) ~[?:1.6.0_65]
at java.lang.ClassLoader.loadClass(ClassLoader.java:247) ~[?:1.6.0_65]
at java.lang.Class.forName0(Native Method) ~[?:1.6.0_65]
at java.lang.Class.forName(Class.java:249) ~[?:1.6.0_65]
at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:40) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.3-66-g43d8943-b3078jnks]
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:127) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.3-66-g43d8943-b3078jnks]

... 9 more

Thus Plugin Is ExtremeRun, its based on XRun, Plugin Page: http://dev.bukkit.org/bukkit-plugins/xrunbykia/


I have no idea why. I'm using a MacOSX Version 10.9.3 (Latest), I hope there are some Mac Users Out There. Here is what a different one says



[08:19:33 ERROR]: Could not load 'plugins/DoubleJumper.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.UnsupportedClassVersionError: me/jrneulight/doublejumper/Main : Unsupported major.minor version 51.0
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:131) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.3-66-g43d8943-b3078jnks]
at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:328) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.3-66-g43d8943-b3078jnks]
at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:251) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-66-g43d8943-b3078jnks]
at org.bukkit.craftbukkit.v1_7_R3.CraftServer.loadPlugins(CraftServer.java:357) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-66-g43d8943-b3078jnks]
at org.bukkit.craftbukkit.v1_7_R3.CraftServer.<init>(CraftServer.java:319) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-66-g43d8943-b3078jnks]
at net.minecraft.server.v1_7_R3.PlayerList.<init>(PlayerList.java:68) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-66-g43d8943-b3078jnks]
at net.minecraft.server.v1_7_R3.DedicatedPlayerList.<init>(SourceFile:14) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-66-g43d8943-b3078jnks]
at net.minecraft.server.v1_7_R3.DedicatedServer.init(DedicatedServer.java:126) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-66-g43d8943-b3078jnks]
at net.minecraft.server.v1_7_R3.MinecraftServer.run(MinecraftServer.java:436) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-66-g43d8943-b3078jnks]
at net.minecraft.server.v1_7_R3.ThreadServerApplication.run(SourceFile:628) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-66-g43d8943-b3078jnks]
Caused by: java.lang.UnsupportedClassVersionError: me/jrneulight/doublejumper/Main : Unsupported major.minor version 51.0
at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.6.0_65]
at java.lang.ClassLoader.defineClassCond(ClassLoader.java:637) ~[?:1.6.0_65]
at java.lang.ClassLoader.defineClass(ClassLoader.java:621) ~[?:1.6.0_65]
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141) ~[?:1.6.0_65]
at java.net.URLClassLoader.defineClass(URLClassLoader.java:283) ~[?:1.6.0_65]
at java.net.URLClassLoader.access$000(URLClassLoader.java:58) ~[?:1.6.0_65]
at java.net.URLClassLoader$1.run(URLClassLoader.java:197) ~[?:1.6.0_65]
at java.security.AccessController.doPrivileged(Native Method) ~[?:1.6.0_65]
at java.net.URLClassLoader.findClass(URLClassLoader.java:190) ~[?:1.6.0_65]
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:77) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.3-66-g43d8943-b3078jnks]
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:62) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.3-66-g43d8943-b3078jnks]
at java.lang.ClassLoader.loadClass(ClassLoader.java:306) ~[?:1.6.0_65]
at java.lang.ClassLoader.loadClass(ClassLoader.java:247) ~[?:1.6.0_65]
at java.lang.Class.forName0(Native Method) ~[?:1.6.0_65]
at java.lang.Class.forName(Class.java:249) ~[?:1.6.0_65]
at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:40) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.3-66-g43d8943-b3078jnks]
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:127) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.3-66-g43d8943-b3078jnks]

... 9 more
And this Plugin is A DoubleJump, I really need it because I have a Hub, Plugin Page: http://dev.bukkit.org/bukkit-plugins/doublejump/
Can anybody tell me how to fix this or what's wrong, Btw the plugins I did not make, So I don't have a Plugin.yml file, I'm also running the latest Java
#!/bin/bash

Hope there is someone out there with A Mac or at least someone who knows how to fix this problem. Incase anyone wants the Startup Script I have this one


#!/bin/bash
cd "$( dirname "$0" )"
java -Xmx1024M -jar craftbukkit.jar -o true

I got it from the Bukkit make a server page: http://wiki.bukkit.org/Setting_up_a_server
I scrolled all the way down to Mac, This is what my server runs on: This server is running CraftBukkit version git-Bukkit-1.7.2-R0.3-66-g43d8943-b3078jnks (MC: 1.7.9) (Implementing API version 1.7.9-R0.1-SNAPSHOT)
Again, Thanks for the people who can help, or at least try to help

 

Install and use java 7

 

But I'm already using Java 7 Update 55 (Latest) Mindcraftson

 

nicodomi12 Usually that plugin error means they compiled it with a different java version.

 

But I'm pretty sure I'm using Java 7 Mindcraftson

 

In your server startup file, you put "java". Try putting the path to java 7 instead. nicodomi12

 

nicodomi12 Sometimes if you have multiple versions of Java on your machine it won't use the one you want it to. Changing your startup script so that it points directly to Java7, like Mindcraftson suggests, should fix it if that's the problem.

 

Ok thanks, but what do I change the Startup Script to JaguarJo

 

I'm not super familiar with Macs so you'll have to adapt this, but the line you have that says

you'll change the java at the beginning to the path for where your java.exe file is. Sort of like this except this one is for windows:

 

Ok thanks, but will it work if I change it to that just .jar instead of .exe JaguarJo

 

You guys didn't help but I found a different pg and now the plugins are working fine

 

Well, you were no help either. Mind posting a link to said solution or at least telling us how you fixed your problem and edit your 1st post and mark it "Solved" ???

 

It really seemed that he forgot to set up plugin.yml properly.