ClassNotFoundException?

So I'm trying to write a plugin, and I'm very new to java development. I am trying to understand why I'm getting a ClassNotFoundException. Heres the error message:

Code:

[19:58:54 ERROR]: Could not load 'plugins/AdvMute.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: Cannot find main class `com.gmail.stownander.AdvMute.AdvancedMute'
    at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:66) ~[spigot.jar:git-Spigot-798f32d-0cd0397]
    at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:131) ~[spigot.jar:git-Spigot-798f32d-0cd0397]
    at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:329) ~[spigot.jar:git-Spigot-798f32d-0cd0397]
    at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:251) [spigot.jar:git-Spigot-798f32d-0cd0397]
    at org.bukkit.craftbukkit.v1_9_R2.CraftServer.loadPlugins(CraftServer.java:297) [spigot.jar:git-Spigot-798f32d-0cd0397]
    at net.minecraft.server.v1_9_R2.DedicatedServer.init(DedicatedServer.java:200) [spigot.jar:git-Spigot-798f32d-0cd0397]
    at net.minecraft.server.v1_9_R2.MinecraftServer.run(MinecraftServer.java:532) [spigot.jar:git-Spigot-798f32d-0cd0397]
    at java.lang.Thread.run(Thread.java:745) [?:1.8.0_92]
Caused by: java.lang.ClassNotFoundException: com.gmail.stownander.AdvMute.AdvancedMute
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[?:1.8.0_92]
    at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:101) ~[spigot.jar:git-Spigot-798f32d-0cd0397]
    at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:86) ~[spigot.jar:git-Spigot-798f32d-0cd0397]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_92]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_92]
    at java.lang.Class.forName0(Native Method) ~[?:1.8.0_92]
    at java.lang.Class.forName(Class.java:348) ~[?:1.8.0_92]
    at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:64) ~[spigot.jar:git-Spigot-798f32d-0cd0397]
   ... 7 more

Here's the class:

Code:

package com.gmail.stownander.AdvMute;

import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.command.CommandExecutor;
import org.bukkit.entity.Player;
import org.bukkit.plugin.java.JavaPlugin;

public class AdvancedMute extends JavaPlugin{
    public void onEnable() {
        this.getCommand("votemute").setExecutor((CommandExecutor) new VoteMuteCommand());
    }
}

Plugin.yml:

Code:

main: com.gmail.stownander.AdvMute.AdvancedMute
name: AdvMute
version: 0.1
author: [email protected]
description: advanced mute commands
commands:
    votemute:
        description: Starts a vote to temp mute a player
        usage: /votemute <player>

I understand this should be really simple to fix, but I'm really struggling to see what I'm doing wrong...

 

This makes no sense.

Can you show your project hierarchy via screenshot pls? @Set3

 

Sorry forgot to include that:
View attachment 27413

 

@Set3
Are you sure you packaged it correctly? Try opening up your .jar file with Winrar or 7zip and see if the main class is in the correct path.

 

@Set3 Have you ever used maven before? Because I think your issue may be a pom issue or a build issue.