Help me please

package me.zeddy;

import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.Location;
import org.bukkit.Material;
import org.bukkit.World;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.EntityType;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.EventPriority;
import org.bukkit.event.Listener;
import org.bukkit.event.block.Action;
import org.bukkit.event.player.PlayerInteractEvent;
import org.bukkit.inventory.ItemStack;
import org.bukkit.inventory.meta.ItemMeta;
import org.bukkit.plugin.java.JavaPlugin;

public class Main extends JavaPlugin implements Listener{

    public void onEnable(){
        saveDefaultConfig();
        getServer().getPluginManager().registerEvents(this , this);
    }

    public void onDisable(){
        saveConfig();
    }

    //0 = skeleton 2 wither 2 zombie 3 player 4 creeper 5 dragon
    //Items
    //wither skull
    public ItemStack Wither(){
        ItemStack witherskull = new ItemStack(Material.SKULL_ITEM, 1, (short) 1);
        ItemMeta meta = witherskull.getItemMeta();
        meta.setDisplayName("WitherBoss");
        witherskull.setItemMeta(meta);
        return witherskull;
    }

    public ItemStack Blaze(){
        ItemStack witherskull = new ItemStack(Material.SKULL_ITEM, 1, (short) 1);
        ItemMeta meta = witherskull.getItemMeta();
        meta.setDisplayName("WitherBoss");
        witherskull.setItemMeta(meta);
        return witherskull;
    }

    public ItemStack Skeleton(){
        ItemStack witherskull = new ItemStack(Material.SKULL_ITEM, 1, (short) 1);
        ItemMeta meta = witherskull.getItemMeta();
        meta.setDisplayName("WitherBoss");
        witherskull.setItemMeta(meta);
        return witherskull;
    }

    public ItemStack Zombie(){
        ItemStack witherskull = new ItemStack(Material.SKULL_ITEM, 1, (short) 1);
        ItemMeta meta = witherskull.getItemMeta();
        meta.setDisplayName("WitherBoss");
        witherskull.setItemMeta(meta);
        return witherskull;
    }

    public ItemStack Witch(){
        ItemStack witherskull = new ItemStack(Material.SKULL_ITEM, 1, (short) 1);
        ItemMeta meta = witherskull.getItemMeta();
        meta.setDisplayName("WitherBoss");
        witherskull.setItemMeta(meta);
        return witherskull;
    }



    public boolean onCommand(CommandSender sender, Command cmd, String commandLabel, String[] args){

        Player player = (Player)sender;
        if (commandLabel.equalsIgnoreCase("bosses")){
            player.sendMessage(ChatColor.translateAlternateColorCodes('&', getConfig().getString("Messages.Verison")));
        return true;
        }else if (commandLabel.equalsIgnoreCase("cmobegg")){
            if (args.length == 2){
                if (player.hasPermission("Bosses.admin")){
                    if (args[0].equalsIgnoreCase(" witherBoss"));
                    Player PlayerTaged = Bukkit.getServer().getPlayer(args[1]);
                    if (PlayerTaged == null){
                        player.sendMessage(ChatColor.RED + "This player is offline!");
                    }else if (PlayerTaged != null){
                        PlayerTaged.getInventory().addItem(Wither());
                    }
                }
            }
        }
        return true;
    }

    @EventHandler(priority=EventPriority.HIGH)
    public void onPlayerUse(PlayerInteractEvent event){
        Player p = event.getPlayer();
        Action click  = event.getAction();
        Location TargetLocation = p.getLocation();
        if (click == Action.RIGHT_CLICK_AIR || click == Action.RIGHT_CLICK_BLOCK){
            p.sendMessage ("works!");
                if(p.getInventory().getItemInMainHand() == Wither()){
                    p.sendMessage("it works for sure!");
                    p.sendMessage (ChatColor.BOLD + "You have spawned a wither boss!");
                    p.getWorld().spawnEntity(TargetLocation, EntityType.WITHER);
                }


            }
    }

}