Well guys, i trying to make a /banip /ipban example plugin, for that, i've created a .YML file to save all banned ip's. The problem is, i can banip and save it normally, but when i try to pick that in a PlayerLoginEvent, he show a error in console... Someone can help-me? ipBanCommand: Code: import Main.Main; import org.bukkit.Bukkit; import org.bukkit.command.Command; import org.bukkit.command.CommandExecutor; import org.bukkit.command.CommandSender; import org.bukkit.entity.Player; import java.io.IOException; public class BanIP implements CommandExecutor { public static String BanReason; public static String BanAuthor; public static String BannedIP; public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args){ Player p = (Player) sender; String perm = "flash.ipban"; String cmd1 = "IPBAN"; String cmd2 = "BANIP"; String motivo = ""; String Author = p.getName(); if(cmd.getName().equalsIgnoreCase(cmd1) || cmd.getName().equalsIgnoreCase(cmd2)){ if(!p.hasPermission(perm)){ p.sendMessage("§cVocê não tem permissão para executar esse comando!"); return true; } if(args.length == 0){ p.sendMessage("§3IPBAN §cVocê precisa selecionar o jogador!"); return true; } if(args.length == 1){ p.sendMessage("§3IPBAN §cSeu ban precisa ter um motivo!"); return true; } if(args.length > 1){ Player target = (Player) Bukkit.getServer().getPlayer(args[0]); String ip = target.getAddress().getAddress().getHostAddress(); for(int i = 1; i < args.length; i++){ motivo = (motivo+args[i]+" "); } BanReason = motivo; BanAuthor = Author; BannedIP = ip; if(target == null){ p.sendMessage("§3IPBAN §cO jogador precisa estar online!"); return true; } target.kickPlayer("§f§lFLASH§cMC"+"\n"+"§cVocê foi permanentemente banido de nosso servidor!"+"\n"+"§fMotivo: §c"+motivo+"\n"+"§fAutor: §c"+Author); Bukkit.broadcastMessage("§fO jogador §c"+target.getName()+" §ffoi banido por §c"+p.getName()+"§f Motivo: §c"+motivo); Main.ipbancfg.set(BannedIP, ""); Main.ipbancfg.set(BannedIP+".MOTIVO", BanReason); Main.ipbancfg.set(BannedIP+".AUTOR", BanAuthor); try{ Main.ipbancfg.save(Main.IPbanned); }catch (IOException e){ e.printStackTrace(); } return true; } } return false; } } Checking the ip in the YML file: Code: String ip = p.getAddress().getAddress().getHostAddress(); if(Main.ipbancfg.get(BanIP.BannedIP) == ip){ e.disallow(PlayerLoginEvent.Result.KICK_BANNED, "§f§lFLASH§cMC"+"\n"+"§cVocê esta permanentemente banido de nosso servidor!"+"\n"+"§fMotivo: §c"+Main.ipbancfg.getString(BanIP.BannedIP+".MOTIVO")+"\n"+"§fAutor: §c"+Main.ipbancfg.getString(BanIP.BannedIP+".AUTOR")); return; } [EDIT] CONSOLE ERROR: [19:59:14 ERROR]: Could not pass event PlayerLoginEvent to FlashMC v1.5 org.bukkit.event.EventException at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:297) ~[craftbukkit.jar:git-Bukkit-33d5de3] at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[craftbukkit.jar:git-Bukkit-33d5de3] at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:501) [craftbukkit.jar:git-Bukkit-33d5de3] at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:486) [craftbukkit.jar:git-Bukkit-33d5de3] at net.minecraft.server.v1_8_R1.PlayerList.attemptLogin(PlayerList.java:409) [craftbukkit.jar:git-Bukkit-33d5de3] at net.minecraft.server.v1_8_R1.LoginListener.b(LoginListener.java:69) [craftbukkit.jar:git-Bukkit-33d5de3] at net.minecraft.server.v1_8_R1.LoginListener.c(LoginListener.java:41) [craftbukkit.jar:git-Bukkit-33d5de3] at net.minecraft.server.v1_8_R1.NetworkManager.a(NetworkManager.java:150) [craftbukkit.jar:git-Bukkit-33d5de3] at net.minecraft.server.v1_8_R1.ServerConnection.c(SourceFile:151) [craftbukkit.jar:git-Bukkit-33d5de3] at net.minecraft.server.v1_8_R1.MinecraftServer.z(MinecraftServer.java:733) [craftbukkit.jar:git-Bukkit-33d5de3] at net.minecraft.server.v1_8_R1.DedicatedServer.z(DedicatedServer.java:284) [craftbukkit.jar:git-Bukkit-33d5de3] at net.minecraft.server.v1_8_R1.MinecraftServer.y(MinecraftServer.java:609) [craftbukkit.jar:git-Bukkit-33d5de3] at net.minecraft.server.v1_8_R1.MinecraftServer.run(MinecraftServer.java:517) [craftbukkit.jar:git-Bukkit-33d5de3] at java.lang.Thread.run(Unknown Source) [?:1.8.0_201] Caused by: java.lang.NullPointerException at Eventos.CheckPlayer.checkConnection(CheckPlayer.java:25) ~[?:?] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_201] at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_201] at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_201] at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_201] at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:295) ~[craftbukkit.jar:git-Bukkit-33d5de3] ... 13 more @KarimAKL
The error is happening here: at Eventos.CheckPlayer.checkConnection(CheckPlayer.java:25) Go to the CheckPlayer class on line 25 - there is a null object there. Post the code on line 25. Mind posting the CheckPlayer class code and your Main class code?