Teleportation GUI

Hello, I am currently working on a bukkit plugin. I know how to make it so you can teleport in a GUI, and I know how you can make it so you open the GUI with a command. But whenever I try to make a teleportation GUI that gets opened with a command, it never works. If anybody have a solution, please post it here. Thank you

 

@UnstoppableNow

1. What did you try to do when you set it so it should open the GUI?
2. Could you show us your code?

 

I hope that will work: instead of a command i would use event listener like this:

Code:

public class Teleport implements Listener {

    @EventHandler
    public void onInteract(PlayerInteractEvent e) {
        if (e.getAction() == Action.RIGHT_CLICK_AIR | e.getAction() == Action.RIGHT_CLICK_BLOCK) {
            if (e.getMaterial().equals(Material.WATCH) && !e.getMaterial().equals(Material.AIR)) {
                ItemStack watch = new ItemStack(Material.WATCH, 1);
                if (e.getItem().equals(watch)) {
                    Inventory inv = Bukkit.createInventory(null, 4 * 9, "§6§lPlayer-Teleporter");

                    for (Player ps : Bukkit.getOnlinePlayers()) {
                        if (ps == e.getPlayer()) {
                            ItemStack item = new ItemStack(Material.SKULL_ITEM, 1, (short) 3);
                            SkullMeta meta = (SkullMeta) item.getItemMeta();
                            meta.setDisplayName("§r§l§o" + ps.getName());
                            meta.setOwner(ps.getName());
                            item.setItemMeta(meta);
                            inv.addItem(item);
                        }
                    }
                    e.getPlayer().openInventory(inv);
                }
            }
        }
    }

    @EventHandler
    public void onClick(InventoryClickEvent e) {
        Player p = (Player) e.getWhoClicked();

        if (e.getInventory().getName().equalsIgnoreCase("§6§lPlayer-Teleporter")) {
            if (e.getSlot() == e.getRawSlot()) {
                if (e.getCurrentItem() != null && e.getCurrentItem().hasItemMeta()) {
                    String pname = ChatColor.stripColor(e.getCurrentItem().getItemMeta().getDisplayName());
                    Player pp = Bukkit.getPlayerExact(pname);

                    if (pp != null) {
                        p.teleport(pp);
                        p.sendMessage(Main.prefix + "§6Teleported to: §2" + pp.getName() + "§6!");
                    }
                }
            }
        }
    }

}