Error joinevent

Hello,

I got a error about joinevent:

Error (open) Error (close)

org.bukkit.event.EventException
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:310) ~[spigot_server.jar:git-Spigot-fdc1440-53fac9f]
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot_server.jar:git-Spigot-fdc1440-53fac9f]
at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [spigot_server.jar:git-Spigot-fdc1440-53fac9f]
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [spigot_server.jar:git-Spigot-fdc1440-53fac9f]
at net.minecraft.server.v1_8_R3.PlayerList.onPlayerJoin(PlayerList.java:298) [spigot_server.jar:git-Spigot-fdc1440-53fac9f]
at net.minecraft.server.v1_8_R3.PlayerList.a(PlayerList.java:157) [spigot_server.jar:git-Spigot-fdc1440-53fac9f]
at net.minecraft.server.v1_8_R3.LoginListener.b(LoginListener.java:144) [spigot_server.jar:git-Spigot-fdc1440-53fac9f]
at net.minecraft.server.v1_8_R3.LoginListener.c(LoginListener.java:54) [spigot_server.jar:git-Spigot-fdc1440-53fac9f]
at net.minecraft.server.v1_8_R3.NetworkManager.a(NetworkManager.java:231) [spigot_server.jar:git-Spigot-fdc1440-53fac9f]
at net.minecraft.server.v1_8_R3.ServerConnection.c(ServerConnection.java:148) [spigot_server.jar:git-Spigot-fdc1440-53fac9f]
at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:813) [spigot_server.jar:git-Spigot-fdc1440-53fac9f]
at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:374) [spigot_server.jar:git-Spigot-fdc1440-53fac9f]
at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:653) [spigot_server.jar:git-Spigot-fdc1440-53fac9f]
at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:556) [spigot_server.jar:git-Spigot-fdc1440-53fac9f]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_60]
Caused by: java.lang.NullPointerException
at main.Level.onPlayerJoin(Level.java:14) ~[?:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_60]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_60]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_60]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_60]
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[spigot_server.jar:git-Spigot-fdc1440-53fac9f]
... 14 more

Code main (open) Code main (close)

package main;

import org.bukkit.Bukkit;
import org.bukkit.plugin.PluginManager;
import org.bukkit.plugin.java.JavaPlugin;

public class Main extends JavaPlugin{
public void onEnable() {
PluginManager pm = Bukkit.getServer().getPluginManager();
pm.registerEvents(new Level(), this);
}
public Main() {

}
}

Code Level (open) Code Level (close)

package main;

import org.bukkit.ChatColor;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.player.PlayerJoinEvent;

public class Level implements Listener {
Main m;
@EventHandler
public void onPlayerJoin(PlayerJoinEvent event) {
Player p = event.getPlayer();
String l = m.getConfig().getString(p + ".level");
if(l == "1"){
p.setDisplayName(ChatColor.GRAY+ "[" + ChatColor.GOLD + "L1" + ChatColor.GRAY + "]" + p.getPlayerListName());
}if(l == "2"){
p.setDisplayName(ChatColor.GRAY+ "[" + ChatColor.GOLD + "L2" + ChatColor.GRAY + "]" + p.getPlayerListName());
}if(l == "3"){
p.setDisplayName(ChatColor.GRAY+ "[" + ChatColor.GOLD + "L3" + ChatColor.GRAY + "]" + p.getPlayerListName());
}if(l == "4"){
p.setDisplayName(ChatColor.GRAY+ "[" + ChatColor.GOLD + "L4" + ChatColor.GRAY + "]" + p.getPlayerListName());
}if(l == "5"){
p.setDisplayName(ChatColor.GRAY+ "[" + ChatColor.GOLD + "L5" + ChatColor.GRAY + "]" + p.getPlayerListName());
}if(l == "6"){
p.setDisplayName(ChatColor.GRAY+ "[" + ChatColor.GOLD + "L6" + ChatColor.GRAY + "]" + p.getPlayerListName());
}if(l == "7"){
p.setDisplayName(ChatColor.GRAY+ "[" + ChatColor.GOLD + "L7" + ChatColor.GRAY + "]" + p.getPlayerListName());
}if(l == "8"){
p.setDisplayName(ChatColor.GRAY+ "[" + ChatColor.GOLD + "L8" + ChatColor.GRAY + "]" + p.getPlayerListName());
}if(l == "9"){
p.setDisplayName(ChatColor.GRAY+ "[" + ChatColor.GOLD + "L9" + ChatColor.GRAY + "]" + p.getPlayerListName());
}else{
m.getConfig().addDefault(p + ".level", "1");
p.setDisplayName(ChatColor.GRAY+ "[" + ChatColor.GOLD + "L1" + ChatColor.GRAY + "]" + p.getPlayerListName());
}

}


}

 

You didn't initialize Main m; in your Level class

 

@kingsofbart

Code:

Caused by: java.lang.NullPointerException
at main.Level.onPlayerJoin(Level.java:14) ~[?:?]

Im guessing line #14 inside the "Level" class is :

Code:

String l = m.getConfig().getString(p + ".level");

Is the string that you're searching for even inside the config? If not, that's most likely what's causing the problem.
Also, if you're searching for a number inside a config, use getInt, not getString.
Use .equals, not ==

 

ty

 

@kingsofbart

1. You should not create a constructor for you Main class because you should only have one instance of your class.
2. JAVA NAMING CONVENTIONS: Why do people love naming their main classes MAIN
3. You are only using pm once, you can remove the PluginManager field.
4. The level class: That is terrible. That's roughly 30 lines that can be reduced to 2 lines.

Seems like I've been ninja'd.

 

thanks for your reaction but it still dont work

error (open) error (close)

org.bukkit.event.EventException
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:310) ~[spigot_server.jar:git-Spigot-fdc1440-53fac9f]
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot_server.jar:git-Spigot-fdc1440-53fac9f]
at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [spigot_server.jar:git-Spigot-fdc1440-53fac9f]
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [spigot_server.jar:git-Spigot-fdc1440-53fac9f]
at net.minecraft.server.v1_8_R3.PlayerList.onPlayerJoin(PlayerList.java:298) [spigot_server.jar:git-Spigot-fdc1440-53fac9f]
at net.minecraft.server.v1_8_R3.PlayerList.a(PlayerList.java:157) [spigot_server.jar:git-Spigot-fdc1440-53fac9f]
at net.minecraft.server.v1_8_R3.LoginListener.b(LoginListener.java:144) [spigot_server.jar:git-Spigot-fdc1440-53fac9f]
at net.minecraft.server.v1_8_R3.LoginListener.c(LoginListener.java:54) [spigot_server.jar:git-Spigot-fdc1440-53fac9f]
at net.minecraft.server.v1_8_R3.NetworkManager.a(NetworkManager.java:231) [spigot_server.jar:git-Spigot-fdc1440-53fac9f]
at net.minecraft.server.v1_8_R3.ServerConnection.c(ServerConnection.java:148) [spigot_server.jar:git-Spigot-fdc1440-53fac9f]
at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:813) [spigot_server.jar:git-Spigot-fdc1440-53fac9f]
at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:374) [spigot_server.jar:git-Spigot-fdc1440-53fac9f]
at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:653) [spigot_server.jar:git-Spigot-fdc1440-53fac9f]
at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:556) [spigot_server.jar:git-Spigot-fdc1440-53fac9f]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_60]
Caused by: java.lang.NullPointerException
at main.Level.onPlayerJoin(Level.java:15) ~[?:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_60]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_60]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_60]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_60]
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[spigot_server.jar:git-Spigot-fdc1440-53fac9f]
... 14 more

is comming now

 

@kingsofbart What's line #15 inside the "Level" class?

 

Object l = m.getConfig().getInt(p + ".level");
(if i try Int l = m.getConfig().getInt(p + ".level"); it doesnt work too)

 

@SuperSniper
Line 15 is this:

String l = m.getConfig().getString(p + ".level");

Make sure l is not equal to null, the m is not null,

@kingsofbart
That is because P is the PLAYERS instance, not their NAME

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

 

@kingsofbart Can we see your config? Im guessing your config is the problem as I said in my first post.

 

@SuperSniper
Even is we see his config, we know that he's trying to use the PLAYER'S INSTANCE, not their name as the path.

@kingsofbart Also, your package is called main, and your main class is called Main. Who taught you these bad practices?

 

@Zombie_Striker Good point, and that's probably a reason why. I want to see it to see if he has anything about the p + ".level

 

I got it! thanks.