Help checking player teams return no players or not.

Hello, I seem to have a simple problem but I am trying to see whether my hunter or runner teams reutrn no players, if they do not the game is supposed to remove the current players from the game , I think I am checking the teams wrong as well, players aer also not being removed from the game, I do think I use == null do I?

addPlayer method checking the teams:

Code:

Bukkit.getScheduler().scheduleSyncDelayedTask(DeathMongol.getInstance(), new Runnable(){
            public void run() {
        if(Hunters.isPlayerHunting(p) && Hunters.getHunters() == null && Runners.getRunners() == null){
            ItemStack[] items = {new ItemStack(Material.COOKED_BEEF, 16), new ItemStack(Material.DIAMOND_SWORD), new ItemStack(Material.BOW)};
            p.getInventory().addItem(items);
            p.getInventory().setHelmet( new ItemStack (Material.DIAMOND_HELMET));
            p.getInventory().setChestplate( new ItemStack (Material.DIAMOND_CHESTPLATE));
            p.getInventory().setLeggings( new ItemStack (Material.DIAMOND_HELMET));
            p.getInventory().setBoots( new ItemStack (Material.DIAMOND_BOOTS));
            p.updateInventory();
            p.teleport(a.spawn);
            Horse horse = (Horse) p.getWorld().spawnCreature(p.getLocation(), EntityType.HORSE); // Spawns the horse
            horse.getInventory().setSaddle(new ItemStack(Material.SADDLE, 1)); // Gives horse saddle
            horse.setTamed(true); // Sets horse to tamed
            horse.setOwner(p);// Makes the horse the players
        } else {
            p.sendMessage(ChatColor.RED + "You've been removed from the game since there are no players to begin with");
            ArenaManager.getManager().removePlayer(p);
 
       
    }  if (Runners.isPlayerRunning(p) && Hunters.getHunters() == null &&  Runners.getRunners() == null){
        ItemStack[] items = {new ItemStack(Material.COOKED_BEEF, 16), new ItemStack(Material.DIAMOND_SWORD), new ItemStack(Material.BOW)};
        p.getInventory().addItem(items);
        p.getInventory().setHelmet( new ItemStack (Material.LEATHER_HELMET));
        p.getInventory().setChestplate( new ItemStack (Material.LEATHER_CHESTPLATE));
        p.getInventory().setLeggings( new ItemStack (Material.LEATHER_LEGGINGS));
        p.getInventory().setBoots( new ItemStack (Material.LEATHER_BOOTS));
        p.updateInventory();
        p.teleport(a.spawn);
    } else {
        p.sendMessage(ChatColor.RED + "You've been removed from the game since there are no players to begin with");
        ArenaManager.getManager().removePlayer(p);
 
     
    }
    }
        }, 20 *10);

Join Command:

Code:

        if (Runners.isPlayerRunning((Player) sender) || Hunters.isPlayerHunting((Player) sender)){
            p.sendMessage(ChatColor.RED + "You can't join....you are already in a game");
        } else {
     
        p.sendMessage(ChatColor.GREEN + "You have joined the game!");
        ArenaManager.getManager().addPlayer(p, num);
        Bukkit.getServer().broadcastMessage(ChatColor.WHITE + "[DeathCavallo]" + ChatColor.AQUA + "A player has joined the game!");
            Random rand = new Random();
            rand.nextInt(20);
            if (rand.nextInt() % 2 == 0){
                TeamHandler.getRunners().addRunner((Player) sender);
                  p.sendMessage(ChatColor.GREEN + "You are now a runner!");
            }  else if (rand.nextInt() % 3 == 0){
                TeamHandler.getHunters().addHunter((Player) sender);
                p.sendMessage(ChatColor.RED + "You are now a hunter!");
                return true;
          

Removing player from arena and team:

Code:java

public void removePlayer(Player p) {
        Arena a = null;
 
        // Searches each arena for the player
        for (Arena arena : this.arenas) {
            if (arena.getPlayers().contains(p.getUniqueId()))
                a = arena;
        }
 
        // Check arena validity
        if (a == null) {
            p.sendMessage("Invalid operation!");
            return;
        }
 
        // Remove from arena player lost
        a.getPlayers().remove(p.getName());
 
        // Remove inventory acquired during the game
        p.getInventory().clear();
        p.getInventory().setArmorContents(null);
 
        // Restore inventory and armor
        p.getInventory().setContents(inv.get(p.getName()));
        p.getInventory().setArmorContents(armor.get(p.getName()));
 
        // Remove player data entries
        inv.remove(p.getUniqueId());
        armor.remove(p.getUniqueId());
 
        // Teleport to original location, remove it too
        p.teleport(locs.get(p.getUniqueId()));
        locs.remove(p.getUniqueId());
 
        //Hunter Remove/Runner Remove
        Runners.getRunners().remove(p.getName());
        Hunters.getHunters().remove(p.getName());
    }
 

Finally ,my hunter and runner classes, and null pointer expection I get when a player is supposed to be removed from the game when there are no players:
Hunter Class and runner class: pretty much the same thing just different list and method names:

Code:

private static List<Player> hunters = new ArrayList<Player>();
 
    public void addHunter(Player player){
        if(hunters.contains(player)){
            return;
        }
        hunters.add(player);
        player.setDisplayName(ChatColor.RED + player.getName());
 
     
        }
    public static List<Player> getHunters(){
        return hunters;
    }
    public void removeHunter(Player player){
        if(hunters.contains(player)){
            hunters.remove(player);
        }
    }
     
    public static boolean isPlayerHunting(Player player){
        if (hunters.contains(player)){
            return true;
        } else
            return false;
 
     
    }
 
        

Expection:

Code:

[13:36:01 WARN]: [DeathCavalllo] Task #2 for DeathCavalllo v0.3 generated an exception
java.lang.NullPointerException
        at org.bukkit.craftbukkit.v1_7_R3.inventory.CraftInventory.setContents(CraftInventory.java:66) ~[craftbukkit.jar:git-Bukkit-1.7.9-R0.2-11-g3fd9db2-b3098jnks]
        at me.creeoer.commands.ArenaManager.removePlayer(ArenaManager.java:200) ~[?:?]
        at me.creeoer.commands.ArenaManager$1.run(ArenaManager.java:139) ~[?:?]
        at org.bukkit.craftbukkit.v1_7_R3.scheduler.CraftTask.run(CraftTask.java:53) ~[craftbukkit.jar:git-Bukkit-1.7.9-R0.2-11-g3fd9db2-b3098jnks]
        at org.bukkit.craftbukkit.v1_7_R3.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:345) [craftbukkit.jar:git-Bukkit-1.7.9-R0.2-11-g3fd9db2-b3098jnks]
        at net.minecraft.server.v1_7_R3.MinecraftServer.v(MinecraftServer.java:600) [craftbukkit.jar:git-Bukkit-1.7.9-R0.2-11-g3fd9db2-b3098jnks]
        at net.minecraft.server.v1_7_R3.DedicatedServer.v(DedicatedServer.java:260) [craftbukkit.jar:git-Bukkit-1.7.9-R0.2-11-g3fd9db2-b3098jnks]
        at net.minecraft.server.v1_7_R3.MinecraftServer.u(MinecraftServer.java:558) [craftbukkit.jar:git-Bukkit-1.7.9-R0.2-11-g3fd9db2-b3098jnks]
        at net.minecraft.server.v1_7_R3.MinecraftServer.run(MinecraftServer.java:469) [craftbukkit.jar:git-Bukkit-1.7.9-R0.2-11-g3fd9db2-b3098jnks]
        at net.minecraft.server.v1_7_R3.ThreadServerApplication.run(SourceFile:628) [craftbukkit.jar:git-Bukkit-1.7.9-R0.2-11-g3fd9db2-b3098jnks]
[13:36:03 INFO]: <creeoer> s

 

Code:

        at me.creeoer.commands.ArenaManager.removePlayer(ArenaManager.java:200) ~[?:?]
        at me.creeoer.commands.ArenaManager$1.run(ArenaManager.java:139) ~[?:?]

What's in line 200 and line 139

 

DinosParkour
Well ArenaManager.removePlayer is the method...and that is in my main post..

 

Creeoer Full class with [s.yntax=java]code[/s.yntax] pls (it adds numbers to the lines so we can see where's the error) (no dots in syntax ofc lol)

 

DinosParkour thread edited.

Ugh...anyone please? You know what I'll shorten the question, I'm trying to get the players from hunters and runners and I cant check if they are ==null, how would I check the amount of players on each team? The classes are in the main post btw.

EDIT by Moderator: merged posts, please use the edit button instead of double posting.