PCT №6 GUI

package nms.main;

import java.util.HashMap;

import org.bukkit.Bukkit;
import org.bukkit.Material;
import org.bukkit.Particle;
import org.bukkit.enchantments.Enchantment;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.inventory.InventoryClickEvent;
import org.bukkit.event.player.PlayerMoveEvent;
import org.bukkit.inventory.Inventory;
import org.bukkit.inventory.ItemFlag;
import org.bukkit.inventory.ItemStack;
import org.bukkit.inventory.meta.ItemMeta;

public class GUI implements Listener
{
    HashMap<Player, String> effects = new HashMap<>();

    public static void gui(Player p)
    {
        Inventory inv = Bukkit.createInventory(null, 9, "§3Меню эффектов");
        ItemStack crit = new ItemStack(Material.NETHER_STAR);
        ItemStack flame = new ItemStack(Material.TORCH);
        ItemStack offon = new ItemStack(Material.REDSTONE_TORCH_ON);
        ItemMeta meta1= crit.getItemMeta();
        ItemMeta meta2 =  flame.getItemMeta();
        ItemMeta meta3 = offon.getItemMeta();
        meta1.setDisplayName("§aЗвёзды");
        meta2.setDisplayName("§6Огонь");
        meta3.setDisplayName("§сВыключить");
        meta1.addItemFlags(ItemFlag.HIDE_ATTRIBUTES, ItemFlag.HIDE_ENCHANTS);
        meta2.addItemFlags(ItemFlag.HIDE_ATTRIBUTES, ItemFlag.HIDE_ENCHANTS);
        meta3.addItemFlags(ItemFlag.HIDE_ATTRIBUTES, ItemFlag.HIDE_ENCHANTS);
        meta1.addEnchant(Enchantment.ARROW_DAMAGE, 1, true);
        meta2.addEnchant(Enchantment.ARROW_DAMAGE, 1, true);
        meta3.addEnchant(Enchantment.ARROW_DAMAGE, 1, true);
        crit.setItemMeta(meta1);
        flame.setItemMeta(meta2);
        offon.setItemMeta(meta3);
        inv.setItem(0, crit);
        inv.setItem(1, flame);
        inv.setItem(8, offon);
        p.openInventory(inv);
    }

    @EventHandler
    public void onCLick(InventoryClickEvent e)
    {
        Player p = (Player) e.getWhoClicked();
        ItemStack item = e.getCurrentItem();
        Inventory inv = e.getInventory();
        if(inv.getName().equalsIgnoreCase("§3Меню эффектов")) {
            e.setCancelled(true);
            switch (item.getItemMeta().getDisplayName()) { //Норм способ проверки названия
            case "§aЗвёзды":
                effects.put(p, "crit");
                break;
            case "§6Огонь":
                effects.put(p, "flame");
                break;
            case "§сВыключить":
                effects.remove(p);
                break;
            default:
                break;
            }
        }
    }

    @EventHandler
    public void onMove(PlayerMoveEvent e)
    {
        if(!effects.containsKey(e.getPlayer())) return;
        Player p = e.getPlayer();

        switch (effects.get(e.getPlayer())) {
        case "crit":
            p.getWorld().spawnParticle(Particle.CRIT, p.getLocation(), 100);
            break;

        case "flame":
            p.getWorld().spawnParticle(Particle.FLAME, p.getLocation(), 100);
            break;
        }
    }
}