Itemstack on specefic slot

Code:

    @EventHandler
    public void PlayerJoin(PlayerLoginEvent event) {
    Player p = event.getPlayer();
    if(!p.hasPlayedBefore()) {
        Material material = Material.COOKIE;
        int ammount = 1;
        ItemStack item = new ItemStack(material, ammount);
        ItemMeta itemMeta = item.getItemMeta();
        itemMeta.setDisplayName("Cookie Achievement");
        itemMeta.setLore(Arrays.asList("You must be", "ride in the darkride", "of the park"));
        item.setItemMeta(itemMeta);
        }
    }

^ This is the code for the itemMeta but i want this Itemmeta on a specefic slot can someone tell how?

 

@TheLittleDeveloper Inventory.setItem(int index, ItemStack item);

 

And where must the id of the slot?

 

@TheLittleDeveloper int index...

 

can you give me an example?

 

@TheLittleDeveloper This should be all you need... The slot is just the index.

 

Material material = Material.COOKIE;
int ammount = 1;
ItemStack item = new ItemStack(material, ammount);
ItemMeta itmMeta = item.getItemMeta();
itemMeta.setDisplayName("Cookie Acheivement");
itemMeta.setLore(Arrays.asList("You must be", "ride in the darkride", "of the park"));
item.setItemMeta(itemMeta);
p.getInventory().setItem(420, item);