Inventory click events and hashmaps for /duel <Player>

Its a duel plugin that you do /duel <Player> and it sends them an inventory with items to accept or decline the duel, but i want a kit selector inventory but need help with it.
The HashMaps:

Code:

Map<UUID, UUID> duels = new HashMap<UUID, UUID>();
Map<UUID, UUID> selecting = new HashMap<UUID, UUID>();

The command:

Code:

if (cmd.getName().equalsIgnoreCase("duel")) {
if (!(args.length == 1)) {
sender.sendMessage(ChatColor.DARK_RED + "[" + ChatColor.DARK_GREEN + "HuntsCraft" + ChatColor.DARK_RED + "]" + ChatColor.RED + " Usage: /duel <Player>");
return true;

} else if (args.length == 1) {
Player p = Bukkit.getServer().getPlayer(args[0]);
if (p != null) {
if (p.equals(sender)) {
sender.sendMessage(ChatColor.DARK_RED + "[" + ChatColor.DARK_GREEN + "HuntsCraft" + ChatColor.DARK_RED + "]" + ChatColor.RED + " You cannot duel yourself!");
return true;
} else {
if (duels.containsKey(p) || duels.containsKey(sender)) {
sender.sendMessage(ChatColor.DARK_RED + "[" + ChatColor.DARK_GREEN + "HuntsCraft" + ChatColor.DARK_RED + "] " + ChatColor.RED + "Either you or " + ChatColor.BLUE + p.getName() + ChatColor.RED + " are already in a duel!");
return true;
} else

openKitSelector((Player) sender);
selecting.put(p.getUniqueId(), ((Player) sender).getUniqueId());

The KitSelector inventory:

Code:

public void openKitSelector(Player p) {
Inventory selector = Bukkit.createInventory(p, 9, ChatColor.DARK_RED + "[" + ChatColor.DARK_GREEN + "KitSelector" + ChatColor.DARK_RED + "]");

ItemStack diamond = new ItemStack(Material.DIAMOND_SWORD);
ItemMeta diamondMeta = diamond.getItemMeta();
diamondMeta.setDisplayName(ChatColor.DARK_AQUA + "Diamond Kit");
diamond.setItemMeta(diamondMeta);

ItemStack iron = new ItemStack(Material.IRON_SWORD);
ItemMeta ironMeta = iron.getItemMeta();
ironMeta.setDisplayName(ChatColor.DARK_GREEN + "Iron Kit");
iron.setItemMeta(ironMeta);

selector.setItem(0, diamond);
selector.setItem(1, iron);

p.openInventory(selector);

}

The Accept/Deny inventory:

Code:

private void openGUI(Player player) {
Inventory inv = Bukkit.createInventory(null, 9, ChatColor.DARK_RED + "[" + ChatColor.DARK_GREEN + "DuelRequest" + ChatColor.DARK_RED + "]");

ItemStack accept = new ItemStack(Material.EMERALD_BLOCK);
ItemMeta acceptMeta = accept.getItemMeta();

ItemStack decline = new ItemStack(Material.REDSTONE_BLOCK);
ItemMeta declineMeta = decline.getItemMeta();

acceptMeta.setDisplayName(ChatColor.GREEN + "Accept!");
accept.setItemMeta(acceptMeta);

declineMeta.setDisplayName(ChatColor.RED + "Decline!");
decline.setItemMeta(declineMeta);

inv.setItem(3, accept);
inv.setItem(5, decline);

player.openInventory(inv);
}

So what i need to happen is, when someone types /duel <player> , they will get an inventory up with a selection of items that will give them kits which i have done correctly and tested it. Then when they select a kit, the target of the /duel command will get an inventory with an accept item and decline item. I got everything working up to the part were the target gets the inventory for accept or deny as i am not really experienced with HashMaps and i am a little confused. Sorry if its a bit much to ask but i really need this doing for my server.

Thanks for your time and any help or constructive criticism is appreciated. ~Matty

 

At this point, you should just have a InventoryClickEvent that checks the Inventory name and then checks the item that was clicked. Right now, you look like you're on the right track.

One comment I do have is about your openKitSelector method; You should save the kits in a map that way you could always add more kits at any time.

 

Yes but, when i do /duel, and it brings the KitSelector up, and click the kit i want, it gives me an error saying that it cant find the player 'target' theres something messed up with the HashMaps and getting/putting them in and out of them.

 

Look into using a BidiMap