Take 3 items from player inventory

I need to take 3 items out of the player inventory but my code dosen't take it if the player has more than 3 in a stack in his inv(player has a stack of 15 items, it will say he dosen't have enough but if he has a stack of 3 items it'll work)
Here's my code:

Code:java

    @EventHandler
    public void onInteract(PlayerInteractEvent e){
        Player p = e.getPlayer();
        if (e.getAction() == Action.RIGHT_CLICK_BLOCK){
            if (e.getClickedBlock().getState() instanceof Sign) {
                Sign s = (Sign) e.getClickedBlock().getState();
                if(s.getLine(0).equalsIgnoreCase(ChatColor.DARK_BLUE + "[Aura Node]")){
                    int itemTrade = 30186;
                    int reward = 2416;
                    ItemStack is = new ItemStack(itemTrade, 3, (short)0);
                    ItemStack rw = new ItemStack(reward, 1, (short) 0);
                    if(p.getInventory().contains(is, 1)){
                        p.getInventory().removeItem(is);
                        p.getInventory().addItem(rw);
                        p.updateInventory();
                        p.sendMessage(ChatColor.GREEN + "You bought an Aura Node !");
                    } else {
                        p.sendMessage(ChatColor.RED + "You do not have enough tokens.");
                    }
                }
            }
        }else{
            return;
        }
    }

 

davidp027 You shouldn't compare ItemStacks. If you compare ItemStacks both of them have to be exactly the same, same durability, amount, and material. I suggest comparing an ItemStack's type to a Material.

 

It's for some modded items so I can't use Material.something

 

moved to Alternatives as this looks like a Cauldron project