Cannot find main class?

console error (open) console error (close)

Code:

[23:13:46] [Server thread/INFO]: Server permissions file permissions.yml is empty, ignoring it
[23:13:46] [Server thread/INFO]: CONSOLE:  [0;32;1mReload complete. [m
[23:16:19] [Server thread/INFO]: CONSOLE:  [0;31;1mPlease note that this command is not supported and may cause issues when using some plugins. [m
[23:16:19] [Server thread/INFO]: CONSOLE:  [0;31;1mIf you encounter any issues please use the /stop command to restart your server. [m
[23:16:19] [Server thread/ERROR]: Could not load 'plugins\Districts.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: Cannot find main class `me.WishMachine.Main'
    at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:42) ~[craftbukkit.jar:git-Bukkit-0af2738]
    at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:129) ~[craftbukkit.jar:git-Bukkit-0af2738]
    at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:328) ~[craftbukkit.jar:git-Bukkit-0af2738]
    at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:251) [craftbukkit.jar:git-Bukkit-0af2738]
    at org.bukkit.craftbukkit.v1_8_R2.CraftServer.loadPlugins(CraftServer.java:288) [craftbukkit.jar:git-Bukkit-0af2738]
    at org.bukkit.craftbukkit.v1_8_R2.CraftServer.reload(CraftServer.java:723) [craftbukkit.jar:git-Bukkit-0af2738]
    at org.bukkit.Bukkit.reload(Bukkit.java:543) [craftbukkit.jar:git-Bukkit-0af2738]
    at org.bukkit.command.defaults.ReloadCommand.execute(ReloadCommand.java:25) [craftbukkit.jar:git-Bukkit-0af2738]
    at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:140) [craftbukkit.jar:git-Bukkit-0af2738]
    at org.bukkit.craftbukkit.v1_8_R2.CraftServer.dispatchCommand(CraftServer.java:625) [craftbukkit.jar:git-Bukkit-0af2738]
    at org.bukkit.craftbukkit.v1_8_R2.CraftServer.dispatchServerCommand(CraftServer.java:611) [craftbukkit.jar:git-Bukkit-0af2738]
    at net.minecraft.server.v1_8_R2.DedicatedServer.aN(DedicatedServer.java:372) [craftbukkit.jar:git-Bukkit-0af2738]
    at net.minecraft.server.v1_8_R2.DedicatedServer.A(DedicatedServer.java:337) [craftbukkit.jar:git-Bukkit-0af2738]
    at net.minecraft.server.v1_8_R2.MinecraftServer.z(MinecraftServer.java:626) [craftbukkit.jar:git-Bukkit-0af2738]
    at net.minecraft.server.v1_8_R2.MinecraftServer.run(MinecraftServer.java:534) [craftbukkit.jar:git-Bukkit-0af2738]
    at java.lang.Thread.run(Unknown Source) [?:1.8.0_40]
Caused by: java.lang.ClassNotFoundException: me.WishMachine.Main
    at java.net.URLClassLoader.findClass(Unknown Source) ~[?:1.8.0_40]
    at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:77) ~[craftbukkit.jar:git-Bukkit-0af2738]
    at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:62) ~[craftbukkit.jar:git-Bukkit-0af2738]
    at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_40]
    at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_40]
    at java.lang.Class.forName0(Native Method) ~[?:1.8.0_40]
    at java.lang.Class.forName(Unknown Source) ~[?:1.8.0_40]
    at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:40) ~[craftbukkit.jar:git-Bukkit-0af2738]
    ... 15 more

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

Code:

name: Districts
main: me.WishMachine.Main
author: WishMachine
version: 1.0

commands:
   join:
      description: /join <district>
      usage: /<command>

the main code (open) the main code (close)

Code:

package me.WishMahcine;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.block.BlockBreakEvent;
import org.bukkit.event.player.PlayerLevelChangeEvent;
import org.bukkit.event.player.PlayerLoginEvent;
import org.bukkit.plugin.java.JavaPlugin;


public class Districts extends JavaPlugin implements Listener {
  
    private ArrayList<String> miners     = new ArrayList<String>();
    private ArrayList<String> warriors     = new ArrayList<String>();
    private ArrayList<String> warlocks     = new ArrayList<String>();
  
    @Override
    public void onEnable() {
        Bukkit.getPluginManager().registerEvents(this, this);
        List<String> s = getConfig().getStringList("districts");
        int k=1;
      
        for (String str : s) {
            String[] words = str.split(":");
            switch (words[k]) {
            case "miner"     : miners.add(words[k-1]); break;
            case "warrior"     : warriors.add(words[k-1]); break;
            case "warlock"     : warlocks.add(words[k-1]); break;
            }
            k=+2;
        }
        saveDefaultConfig();      
    }
  
    @Override
    public void onDisable() {
        java.util.List<String> s = getConfig().getStringList("levels");      
        getConfig().set("levels", s);
        saveConfig();
    }
  

    HashMap<ArrayList<String>, Integer> map = new HashMap<>();
  
    static org.bukkit.Material i = org.bukkit.Material.IRON_ORE;
    static org.bukkit.Material g = org.bukkit.Material.GOLD_ORE;
    static org.bukkit.Material r = org.bukkit.Material.REDSTONE_ORE;
    static org.bukkit.Material l = org.bukkit.Material.LAPIS_ORE;
    static org.bukkit.Material d = org.bukkit.Material.DIAMOND_ORE;
    static org.bukkit.Material e = org.bukkit.Material.EMERALD_ORE;
  
    @EventHandler
    public static void onJoin(PlayerLoginEvent join) {
        Player player = join.getPlayer();
        player.sendMessage(ChatColor.GOLD + "CHOOSE YOUR DISTRICT" + ChatColor.BLUE + "/join Miner\n/join Warrior\n/join Warlock" + ChatColor.ITALIC);
        player.setPlayerListName(player.getDisplayName() + "   " + player.getLevel());
    }
  
    @EventHandler
    public static void onLvlChange(PlayerLevelChangeEvent lvl) {
        Player player = lvl.getPlayer();
        player.setPlayerListName(player.getDisplayName() + "   " + player.getLevel());
    }
  
    public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args) {
        Player player = (Player) sender;
        java.util.List<String> s = getConfig().getStringList("levels");

        if (cmd.getName().equalsIgnoreCase("join") && sender instanceof Player) {
            if (args.length == 1) {
                if (args[1] == "miner") {
                    //set spawn
                    if (miners.contains(player.getDisplayName()) == true) {
                        player.sendMessage(ChatColor.RED + "You are already in this district.");                      
                    }
                    else if (warriors.contains(player.getDisplayName()) == true) {
                        player.sendMessage(ChatColor.RED + "You are already in another district.");
                    }
                    else if (warlocks.contains(player.getDisplayName()) == true) {
                        player.sendMessage(ChatColor.RED + "You are already in another district.");
                    }                      
                    else {
                        miners.add(player.getDisplayName() + ":");
                        s.add(player.getDisplayName() + ":" + "miner");
                    }                  
                }
                if (args[1] == "warrior") {
                    //set spawn  
                    if (warriors.contains(player.getDisplayName()) == true) {
                        player.sendMessage(ChatColor.RED + "You are already in this district.");                      
                    }
                    else if (miners.contains(player.getDisplayName()) == true) {
                        player.sendMessage(ChatColor.RED + "You are already in another district.");                      
                    }
                    else if (warlocks.contains(player.getDisplayName()) == true) {
                        player.sendMessage(ChatColor.RED + "You are already in another district.");                      
                    }
                    else {
                        miners.add(player.getDisplayName());
                        s.add(player.getDisplayName() + ":" + "warrior");
                    }  
                }
                if (args[1] == "warlock") {
                    //set spawn  
                    if (warlocks.contains(player.getDisplayName()) == true) {
                        player.sendMessage(ChatColor.RED + "You are already in this district.");                      
                    }
                    else if (miners.contains(player.getDisplayName()) == true) {
                        player.sendMessage(ChatColor.RED + "You are already in another district.");                      
                    }
                    else if (warriors.contains(player.getDisplayName()) == true) {
                        player.sendMessage(ChatColor.RED + "You are already in another district.");
                    }
                    else {
                        miners.add(player.getDisplayName());
                        s.add(player.getDisplayName() + ":" + "warrior");
                    }  
                }
            }
          
        }
        return false;      
    }
  
    public static void onBlockBreak(BlockBreakEvent bb) {
        int lvl = bb.getPlayer().getLevel();
        org.bukkit.Material x = bb.getBlock().getType();
      
        if ( x == i && lvl < 2 ) {
            bb.setCancelled(true);          
        }
        else if ( x == g && lvl < 4) {
            bb.setCancelled(true);
        }
        else if ( x == r && lvl < 8) {
            bb.setCancelled(true);
        }
        else if ( x == l && lvl < 12) {
            bb.setCancelled(true);
        }
        else if ( x == d && lvl < 16) {
            bb.setCancelled(true);
        }
        else if ( x == e && lvl < 30) {
            bb.setCancelled(true);
        }  
    }
  
}

The plugin.yml should be correct, this isn't the first time I have made one, and everything has been exported correctly, I see my main class in the java file and everything...? I have tried the fixes on other posts with similar errors but nothing is working and everything looks right to me, so I really need some help here

Thanks in advance

 

Your class is called Districts but you define it as Main in the plugin.yml.

 

a note:
Please don't cast without checking : Player player =(Player) sender;
See my signature.

 

Moved to Bukkit Alternates.