Knockbackstick command

hitstandcommand.js

var Material = org.bukkit.Material;
var ItemStack = org.bukkit.inventory.ItemStack;
var ItemMeta = org.bukkit.inventory.meta.ItemMeta;
var Enchantment = org.bukkit.enchantments.Enchantment;
var ChatColor = org.bukkit.ChatColor;

addCommand("knockbackstick", {
    onCommand: function(sender) {
        if (!sender.getInventory) {
            sender.sendMessage("§cThis command can only be used by players.");
            return;
        }

        // Create stick
        var stick = new ItemStack(Material.STICK, 1);
        var meta = stick.getItemMeta();

        // Set display name
        meta.setDisplayName(ChatColor.GOLD + "Knockback Stick");

        // Set lore (optional)
        meta.setLore(toJavaList([
            ChatColor.GRAY + "Launches enemies into the sky!",
            ChatColor.DARK_GRAY + "Handle with care."
	    ]));

        // Add Knockback enchantment (level 1)
        meta.addEnchant(Enchantment.KNOCKBACK, 1, true);

        // Hide enchantments from display (optional)
        var ItemFlag = org.bukkit.inventory.ItemFlag;
        meta.addItemFlags(ItemFlag.HIDE_ENCHANTS);

        stick.setItemMeta(meta);

        // Give item
        sender.getInventory().addItem(stick);
        sender.sendMessage("§aYou've received the mighty Knockback Stick!");
    }
});