Nature

    @EventHandler
    public void onPlayerInteract(PlayerInteractEvent event) {
        if(event.getAction() == Action.RIGHT_CLICK_AIR || event.getAction() == Action.RIGHT_CLICK_BLOCK) {
        Player player = event.getPlayer();

        if (event.getItem().equals({Itemstack})) {
            Bukkit.dispatchCommand(player, {String command to execute});
        }
    }