MiniGame Help Needed

i saw a minigame tutorial on bukkit and i got some code from it but i don't know why i get a error if i restart my server the error is that it say that i can't join the game because he can't find the arena
this is all my code this is my main class:

Code:java

package me.jesse.run;
 
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.plugin.java.JavaPlugin;
 
public class Run extends JavaPlugin {
 
@Override
public void onEnable(){
if(getConfig() == null)
saveDefaultConfig();
 
new ArenaManager(this);
ArenaManager.getManager().loadGames();
 
getServer().getPluginManager().registerEvents(new GameListener(this), this);
}
 
@Override
public void onDisable(){
saveConfig();
}
 
@Override
public boolean onCommand(CommandSender sender, Command cmd, String label, String args[]){
if(!(sender instanceof Player)){
sender.sendMessage("Whoa there buddy, only players may execute this!");
return true;
}
 
Player p = (Player) sender;
 
if(cmd.getName().equalsIgnoreCase("runcreate")){
ArenaManager.getManager().createArena(p.getLocation());
p.sendMessage("Created arena at " + p.getLocation().toString());
 
return true;
}
if(cmd.getName().equalsIgnoreCase("runjoin")){
if(args.length != 1){
p.sendMessage("Insuffcient arguments!");
return true;
}
int num = 0;
try{
num = Integer.parseInt(args[0]);
}catch(NumberFormatException e){
p.sendMessage("Invalid arena ID");
}
ArenaManager.getManager().addPlayer(p, num);
 
return true;
}
if(cmd.getName().equalsIgnoreCase("runleave")){
ArenaManager.getManager().removePlayer(p);
p.sendMessage("You have left the arena!");
 
return true;
}
if(cmd.getName().equalsIgnoreCase("runremove")){
if(args.length != 1){
p.sendMessage("Insuffcient arguments!");
return true;
}
int num = 0;
try{
num = Integer.parseInt(args[0]);
}catch(NumberFormatException e){
p.sendMessage("Invalid arena ID");
}
ArenaManager.getManager().removeArena(num);
 
return true;
}
 
return false;
}
 
}
 

and this is my arena class:

Code:java

package me.jesse.run;
 
import java.util.ArrayList;
import java.util.List;
 
import org.bukkit.Location;
 
public class Arena{
 
//you want some info about the arena stored here
int number = 0;//the arena id
Location spawn = null;//spawn location for the arena
List<String> players = new ArrayList<String>();//list of players
 
//now let's make a few getters/setters, and a constructor
public Arena(Location loc, int id){
this.spawn = loc;
this.number = id;
}
 
public int getId(){
return this.number;
}
 
public List<String> getPlayers(){
return this.players;
}
}

and this is my ArenaManager:

Code:java

package me.jesse.run;
 
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
 
import org.bukkit.Bukkit;
import org.bukkit.Location;
import org.bukkit.entity.Player;
import org.bukkit.inventory.ItemStack;
 
public class ArenaManager {
 
//save where the player teleported
public Map<String, Location> locs = new HashMap<String, Location>();
//make a new instance of the class
public static ArenaManager a = new ArenaManager();
//a few other fields
Map<String, ItemStack[]> inv = new HashMap<String, ItemStack[]>();
Map<String, ItemStack[]> armor = new HashMap<String, ItemStack[]>();
//list of arenas
List<Arena> arenas = new ArrayList<Arena>();
int arenaSize = 0;
 
static Run plugin;
public ArenaManager(Run arenaPVP) {
plugin = arenaPVP;
}
 
public ArenaManager(){
 
}
 
//we want to get an instance of the manager to work with it statically
public static ArenaManager getManager(){
return a;
}
 
//get an Arena object from the list
public Arena getArena(int i){
for(Arena a : arenas){
if(a.getId() == i){
return a;
}
}
return null;
}
 
//add players to the arena, save their inventory
public void addPlayer(Player p, int i){
Arena a = getArena(i);//get the arena you want to join
if(a == null){//make sure it is not null
p.sendMessage("Invalid arena!");
return;
}
 
a.getPlayers().add(p.getName());//add them to the arena list of players
inv.put(p.getName(), p.getInventory().getContents());//save inventory
armor.put(p.getName(), p.getInventory().getArmorContents());
 
p.getInventory().setArmorContents(null);
p.getInventory().clear();
 
p.teleport(a.spawn);//teleport to the arena spawn
GameListener.add(p);
}
 
//remove players
public void removePlayer(Player p){
Arena a = null;//make an arena
for(Arena arena : arenas){
if(arena.getPlayers().contains(p.getName())){
a = arena;//if the arena has the player, the arena field would be the arena containing the player
}
//if none is found, the arena will be null
}
if(a == null || !a.getPlayers().contains(p.getName())){//make sure it is not null
p.sendMessage("Invalid operation!");
return;
}
 
a.getPlayers().remove(p.getName());//remove from arena
 
p.getInventory().clear();
p.getInventory().setArmorContents(null);
 
p.getInventory().setContents(inv.get(p.getName()));//restore inventory
p.getInventory().setArmorContents(armor.get(p.getName()));
 
inv.remove(p.getName());//remove entries from hashmaps
armor.remove(p.getName());
p.teleport(locs.get(p.getName()));
locs.remove(p.getName());
}
 
//create arena
public void createArena(Location l){
int num = arenaSize + 1;
arenaSize++;
 
Arena a = new Arena(l, num);
arenas.add(a);
 
plugin.getConfig().set("Arenas" + num, serializeLoc(l));
List<Integer> list = plugin.getConfig().getIntegerList("Arenas.Arenas");
list.add(num);
plugin.getConfig().set("Arenas.Arenas", list);
plugin.saveConfig();
}
 
public void removeArena(int i){
for(String s : getArena(i).getPlayers()){
Player p = Bukkit.getPlayerExact(s);
if(p != null){
p.teleport(locs.get(p.getName()));
locs.remove(p.getName());
}
}
arenas.remove(getArena(i));
plugin.getConfig().set("Arenas" + num, null);
List<Integer> list = plugin.getConfig().getIntegerList("Arenas.Arenas");
list.remove(i);
plugin.getConfig().set("Arenas.Arenas", list);
plugin.saveConfig();
}
 
public boolean isInGame(Player p){
for(Arena a : arenas){
if(a.getPlayers().contains(p.getName()))
return true;
}
return false;
}
 
public void loadGames(){
if(plugin.getConfig().getIntegerList("Arenas.Arenas").isEmpty()){
return;
}
 
for(int i : plugin.getConfig().getIntegerList("Arenas.Arenas")){
Arena a = new Arena(deserializeLoc(plugin.getConfig().getString("Arenas" + i)), i);
arenas.add(a);
}
}
public String serializeLoc(Location l){
return l.getWorld().getName()+","+l.getBlockX()+","+l.getBlockY()+","+l.getBlockZ();
}
public Location deserializeLoc(String s){
String[] st = s.split(",");
return new Location(Bukkit.getWorld(st[1]), Integer.parseInt(st[1]), Integer.parseInt(st[2]), Integer.parseInt(st[3]));
}
}
 

and this is my GameListener:

Code:java

package me.jesse.run;
 
import java.util.ArrayList;
import java.util.List;
 
import org.bukkit.Bukkit;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.entity.EntityDamageByEntityEvent;
import org.bukkit.event.entity.PlayerDeathEvent;
 
public class GameListener implements Listener{
 
static List<String> players = new ArrayList<String>();
static Run plugin;
 
public GameListener(Run plugin){
GameListener.plugin = plugin;
}
 
@EventHandler
public void onDamange(EntityDamageByEntityEvent e){
if(e.getEntity() instanceof Player && players.contains(((Player) e.getEntity()).getName())){
e.setCancelled(true);
}
}
 
@EventHandler
public void onDeath(PlayerDeathEvent e){
if(ArenaManager.getManager().isInGame(e.getEntity())){
ArenaManager.getManager().removePlayer(e.getEntity());
}
}
 
public static void add(Player p){
final String name = p.getName();
players.add(name);
 
Bukkit.getScheduler().scheduleSyncDelayedTask(plugin, new Runnable(){
@Override
public void run(){
players.remove(name);
}
}, 100L);
}
}

Sorry for my bad english and please someone help me i get a error by the ArenaManager line 121

 

Do you have a config.yml?

 

What's the error?

 

superjesse07
Please read the OP:

I have included and example here in order to elaborate, further down in the comments:
https://github.com/AgentTroll/Arena...mail/woodyc40/arenapvp/ArenaManager.java#L136

 

xTrollxDudex i'm not good at coding how do i make a load thing or how its called

 

superjesse07
Are you new? You shouldn't be doing this if you don't know what you are doing and purely copy pasting. Otherwise, like I said, there is an example of a load method on the repo I linked.

 

xTrollxDudex ow thank you i i'm a little bit new in this but i'm very good at it already