Villager trade 1.8

Hello i have some problems with my customs trades.... please help me if you can !

EDIT: (the problem is that the inventory won't open)

Here is the code:

Code:

@EventHandler
    public void onInteractPlayer(PlayerInteractEntityEvent ev) {
        Player p = ev.getPlayer();
        Entity ent = ev.getRightClicked();
        if (ent instanceof Villager) {

            if (ent.getCustomName().equalsIgnoreCase("§aTest")){
                ev.setCancelled(true);
                Inventory i = Bukkit.createInventory(null, InventoryType.MERCHANT, "Test");
                i.clear();
                i.addItem(new ItemStack(Material.DIAMOND, 10), new ItemStack(Material.EMERALD, 1));
                p.openInventory(i);

            }
        }
    }

thank you !

 

i tried to put a p.sendMessage"§agood" after the lines of inventory and the message was sent so i don't understand, i also tried to put the inventory lines in a try / catch and no error, but nothing happen

 

How does your main class look like

 

first thank's for trying to help me and i only use the main class so i have 800+ lines.. And i really think it's just a bug, cause if i try to open a chest inventory, it works ! but not InventoryType.MERCHANT........ strange

 

thank's but this is for 1.14, my server is in 1.8 version ;(