meta.setLore(Arrays.asList(two));
result.setItemMeta(meta);
anvil.setItem(2, result);

public class Anvil implements Listener {

    String one = ChatColor.translateAlternateColorCodes('&', "&bSwift I");
    String two = ChatColor.translateAlternateColorCodes('&', "&eSwift II");

    @EventHandler
    public void onCombine(InventoryClickEvent e) {
        if (!(e.getWhoClicked() instanceof Player))
            return;
        ClickType click = e.getClick();
        int slot = e.getSlot();
        SlotType stype = e.getSlotType();
        InventoryType inv = e.getInventory().getType();
        ItemStack current = e.getCurrentItem();
        ItemStack cursor = e.getCursor();
        if (click == ClickType.LEFT || click == ClickType.RIGHT) {
            if (current.getType() == Material.AIR && cursor.getType() != Material.AIR) {
                if (!(stype == SlotType.CRAFTING && inv == InventoryType.ANVIL))
                    return;
                AnvilInventory anvil = (AnvilInventory) e.getInventory();
                ItemStack[] items = anvil.getContents();
                ItemStack item1 = items[0];
                ItemStack item2 = items[1];
                List<String> lore = cursor.getItemMeta().getLore();
                Material book = Material.ENCHANTED_BOOK;
                ItemStack result = new ItemStack(Material.ENCHANTED_BOOK);
                ItemMeta meta = result.getItemMeta();
                if (slot == 1 && item1 != null) {
                    if (!(cursor.getType() == book && item1.getType() == book))
                        return;
                    List<String> lore1 = item1.getItemMeta().getLore();
                    if (lore1.contains(one) && lore.contains(one)) {
                        meta.setLore(Arrays.asList(two));
                        result.setItemMeta(meta);
                        anvil.setItem(2, result);
                    }
                } else if (item1 == null && item2 != null) {
                    if (!(cursor.getType() == book && item2.getType() == book))
                        return;
                    List<String> lore2 = item2.getItemMeta().getLore();
                    if (lore2.contains(one) && lore.contains(one)) {
                        meta.setLore(Arrays.asList(two));
                        result.setItemMeta(meta);
                        anvil.setItem(2, result);
                    }
                }
            }
        }
    }
}