Re-Name Multiple Picked Up Items?

I am trying to rename multiple items (of the same item stack type), but it only re-names them if there is one of that item. What would I change so it re-names all the items picked up, not just one?

Code (Text):

// Arrow
            if (e.getItem().getItemStack().equals(new ItemStack(Material.ARROW))) {
                ItemMeta arrowMeta = e.getItem().getItemStack().getItemMeta();
                ArrayList<String> arrowlore = new ArrayList<String>();
                arrowlore.add(ChatColor.GRAY + "- Class: Marksman");
                arrowlore.add(ChatColor.GRAY + "- Level Unlocked: 0");
                arrowlore.add(ChatColor.GRAY + "- The powerful arrows to lay enemies to their graves!");
                arrowMeta.setLore(arrowlore);
                arrowMeta.setDisplayName(ChatColor.DARK_RED + "Arrow");
                e.getItem().getItemStack().setItemMeta(arrowMeta);
            }

 

What would checking if the pickup is cancelled do? (Besides check if the player cannot pick it up?)

 

This code doesn't work. (Not sending the player "Hi", or renaming the item.)

Code (Text):

// Snowball
            if (e.getItem().getItemStack().getType().equals(new ItemStack(Material.SNOW_BALL))) {
                e.getPlayer().sendMessage("Hi");
                ItemMeta snowMeta = e.getItem().getItemStack().getItemMeta();
                ArrayList<String> snowlore = new ArrayList<String>();
                snowlore.add(ChatColor.GRAY + "- Class: ANY");
                snowlore.add(ChatColor.GRAY + "- Level Unlocked: 0");
                snowlore.add(ChatColor.GRAY + "- Deals damage, and slows down enemies! (May give slowness)");
                snowMeta.setLore(snowlore);
                snowMeta.setDisplayName(ChatColor.DARK_RED + "Throwing Knife");
                e.getItem().getItemStack().setItemMeta(snowMeta);
            }