Error

public class LegacyWeapons
implements Listener
{
	public static Main plugin;
	public HashMap<String, Long> cooldown = new HashMap();
	public int cooldownTime = 20;
	public LegacyWeapons(Main instance) {
		plugin = instance;
	}

	@EventHandler
	public void onLegacyWeaponClick(PlayerInteractEvent event) {
		final Player player = event.getPlayer();
		Sound gh = Sound.WITHER_HURT;
		if ((player.getInventory().getItemInHand().getType() == Material.IRON_AXE) &&
				(player.getItemInHand().getItemMeta().hasDisplayName()) &&
				((event.getAction() == Action.RIGHT_CLICK_AIR) || (event.getAction() == Action.RIGHT_CLICK_BLOCK)) &&
				(player.getItemInHand().getItemMeta().getDisplayName().equalsIgnoreCase(ChatColor.RED + "Hyper Axe"))) {
			if (cooldown.containsKey(player.getName())) {
				long diff = (System.currentTimeMillis() - cooldown.get(player.getName())) / 1000;
				if (diff < cooldownTime) {
					player.sendMessage(ChatColor.AQUA + "[Hyper Axe]" + ChatColor.LIGHT_PURPLE + " Hyper Speed" + ChatColor.YELLOW + " is still on a " + ChatColor.LIGHT_PURPLE + (this.cooldownTime - diff) + "s" + ChatColor.YELLOW + " cooldown!");
					return;
				}
				this.cooldown.put(player.getName(), Long.valueOf(System.currentTimeMillis()));
			}

			this.cooldown.put(player.getName(), Long.valueOf(System.currentTimeMillis()));
		if (player.getItemInHand().getItemMeta().getDisplayName().equalsIgnoreCase(ChatColor.RED + "Hyper Axe")) {
			Sound sound = Sound.WITHER_HURT;
			player.getWorld().playEffect(player.getLocation(), Effect.STEP_SOUND, Material.IRON_BLOCK.getId());
			player.getWorld().playEffect(player.getLocation(), Effect.STEP_SOUND, Material.LAPIS_BLOCK.getId());

		player.addPotionEffect(new PotionEffect(PotionEffectType.SPEED,
				120, 3));
		player.sendMessage(ChatColor.AQUA + "[Hyper Axe] " + ChatColor.GRAY + "You used " + ChatColor.LIGHT_PURPLE + "Hyper Speed!");
		}

		}





		Bukkit.getServer().getScheduler().scheduleSyncDelayedTask(plugin, new Runnable() {
			public void run() {
				if (LegacyWeapons.this.cooldown.containsKey(player.getName())) {
					LegacyWeapons.this.cooldown.remove(player.getName());
					player.sendMessage(ChatColor.AQUA + "[Hyper Axe] " + ChatColor.YELLOW + "[Recharged]" + ChatColor.GREEN + " Hyper Speed");
					/*    */
					/*    */
					/*    */   {
					/*    */   }
					/*    */ }
					  }},400);
						}