[HELP] java.lang.UnsupportedClassVersionError

Well i am making another plugin, when i run it for the first time i get this error:
java.lang.UnsupportedClassVersionError

Plugin.yml

Code:

name: Test
main: com.github.stuntguy3000.Test.Test
version: 1.0
author: stuntguy3000

Ideas?

 

full error?

 

Ok...

Code:

17:08:49 [SEVERE] Could not load 'plugins\Test.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.UnsupportedClassVersionError
: com/github/stuntguy3000/Test/Test : Unsupported major.minor version 51.0
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.j
ava:150)
        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:207)
        at org.bukkit.craftbukkit.CraftServer.<init>(CraftServer.java:183)
        at net.minecraft.server.ServerConfigurationManager.<init>(ServerConfigur
ationManager.java:53)
        at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:156)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:422)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)
Caused by: java.lang.UnsupportedClassVersionError: com/github/stuntguy3000/Test/Test : 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.j
ava:139)
        ... 8 more

 

Your sever has a different (older) version of Java than you're developing for.

Also, I doubt github would like you using their namespace.

 

You missed the important part: "Unsupported major.minor version 51.0"

Use java 6 to compile your plugin.

 

This should be a sticky or something: "Extremely Common Errors"

 

Definitely!

 

I did this and nothing. Nada. Zip. Zilch. Any help?

 

• necropost much?
• then you somehow compiled with Java 7

 

I got it fixed. Don't worry

 

nateracecar5 It would be helpful if you could tell the world how you "got it fixed" so that you can help the next person like me. I am also having trouble with this, as when I use Java 6, then it says "Unable to load <pluginname>, is it up to date?"
More assistance on this would be appreciated!

 

Compile with the same or older version of Java than the server is running. That fix is all over these forums and even in this thread. Your error line does not give us any information, give the whole one.

 

Jeez do people love necroposting on this thread or something?

 

Check out:
Plugin has Java Version 1.8
and Server has Java Version 1.8
or
Plugin has Java Version 1.7
and Server has Java Version 1.7

 

nopvpgamer You necro'd a necro'd thread.