Help with config and arenas

i have a error on this code

Code:

 public Arena(int id){
             id = id;
             ConfigurationSection s = SettingManager.getManager().get("arenas."+id+".spawn.world.x.y.z");
               spawn= new Location(Bukkit.getServer().getWorld(s.getString("world")),
                    s.getDouble("x"),
                    s.getDouble("y"),
                    s.getDouble("z"));

        }

at com.hoyken.Main.Manage.Arena.<init>(Arena.java:23) ~[?:?]
what can i do??
​

 

First, learn java.
Second- This is a common error? What is line 23?

 

First, id = id only sets the local id to itself, use this.id

 

I strongly doubt you have a configuration that goes

Code:

arenas:
  [id]:
    world:
      x:
        y:
          z:
            x: [double]
            y: [double]
            z: [double]

 

the prolem can be here?

Code:

  if(args[0].equalsIgnoreCase("create")){
                            if(args[1]!=null)   {
                                int id = 0;
                                try {
                                    id = Integer.parseInt(args[1]);
                                }catch (Exception ex){
                                    p.sendMessage("Pls Enter valid id");
                                }
                                SettingManager.getManager().create(id + "");
                                ArenaManage.getMange().createArena(id);

                            }

 

line 23: spawn= new Location(Bukkit.getServer().getWorld(s.getString("world")),
but i have other error on execute command: ArenaManage.getMange().createArena(id);

 

Code:

 at com.hoyken.Main.Manage.Arena.<init>(Arena.java:24) ~[?:?]
        at com.hoyken.Main.Manage.ArenaManage.createArena(ArenaManage.java:20) ~[?:?]
        at com.hoyken.Main.Pl.onCommand(Pl.java:46) ~[?:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[Spigot-1649.jar:git-Spigot-1649]

 

That's not the error, that's just some lines that caused it.
What's the actual error?