Why u no work plugin?!

*sigh* every time it doesn't work

Code:

Could not load 'plugins/ToolUpgrade.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: Cannot find main class `me.youruser.ToolUpgrade'
    at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:42) ~[craftbukkit_server.jar:git-Bukkit-18fbb24]
    at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:129) ~[craftbukkit_server.jar:git-Bukkit-18fbb24]
    at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:328) ~[craftbukkit_server.jar:git-Bukkit-18fbb24]
    at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:251) [craftbukkit_server.jar:git-Bukkit-18fbb24]
    at org.bukkit.craftbukkit.v1_8_R3.CraftServer.loadPlugins(CraftServer.java:289) [craftbukkit_server.jar:git-Bukkit-18fbb24]
    at org.bukkit.craftbukkit.v1_8_R3.CraftServer.reload(CraftServer.java:718) [craftbukkit_server.jar:git-Bukkit-18fbb24]
    at org.bukkit.Bukkit.reload(Bukkit.java:544) [craftbukkit_server.jar:git-Bukkit-18fbb24]
    at org.bukkit.command.defaults.ReloadCommand.execute(ReloadCommand.java:25) [craftbukkit_server.jar:git-Bukkit-18fbb24]
    at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:140) [craftbukkit_server.jar:git-Bukkit-18fbb24]
    at org.bukkit.craftbukkit.v1_8_R3.CraftServer.dispatchCommand(CraftServer.java:620) [craftbukkit_server.jar:git-Bukkit-18fbb24]
    at net.minecraft.server.v1_8_R3.PlayerConnection.handleCommand(PlayerConnection.java:1106) [craftbukkit_server.jar:git-Bukkit-18fbb24]
    at net.minecraft.server.v1_8_R3.PlayerConnection.a(PlayerConnection.java:966) [craftbukkit_server.jar:git-Bukkit-18fbb24]
    at net.minecraft.server.v1_8_R3.PacketPlayInChat.a(SourceFile:37) [craftbukkit_server.jar:git-Bukkit-18fbb24]
    at net.minecraft.server.v1_8_R3.PacketPlayInChat.a(SourceFile:9) [craftbukkit_server.jar:git-Bukkit-18fbb24]
    at net.minecraft.server.v1_8_R3.PlayerConnectionUtils$1.run(SourceFile:13) [craftbukkit_server.jar:git-Bukkit-18fbb24]
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_65]
    at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_65]
    at net.minecraft.server.v1_8_R3.SystemUtils.a(SourceFile:44) [craftbukkit_server.jar:git-Bukkit-18fbb24]
    at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:673) [craftbukkit_server.jar:git-Bukkit-18fbb24]
    at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:335) [craftbukkit_server.jar:git-Bukkit-18fbb24]
    at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:629) [craftbukkit_server.jar:git-Bukkit-18fbb24]
    at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:537) [craftbukkit_server.jar:git-Bukkit-18fbb24]
    at java.lang.Thread.run(Thread.java:745) [?:1.8.0_65]
Caused by: java.lang.ClassNotFoundException: me.youruser.ToolUpgrade
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[?:1.8.0_65]
    at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:77) ~[craftbukkit_server.jar:git-Bukkit-18fbb24]
    at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:62) ~[craftbukkit_server.jar:git-Bukkit-18fbb24]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_65]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_65]
    at java.lang.Class.forName0(Native Method) ~[?:1.8.0_65]
    at java.lang.Class.forName(Class.java:348) ~[?:1.8.0_65]
    at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:40) ~[craftbukkit_server.jar:git-Bukkit-18fbb24]
    ... 22 more

PLEASE HELP MEEE

I am a noob

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

Gee, Would be nice to actually see your plugin.

The error is caused because the path you provided for your main class does not exist. You are either missing a sub-directory or did not provide the correct spelling of the path.

 

http://bukkit.org/threads/how-to-re...ubleshoot-your-own-plugins-by-yourself.32457/

The main in your plugin.yml needs to be the fully qualified name of your JavaPlugin extended class. It is case sensitive.

 

Are you sure that "me.youruser.ToolUpgrade" extends JavaPlugin ?
Are you sure your main class which extends JavaPlugin is in the package "me.youruser" and is named "ToolUpgrade" ?