Internal Error

Hi. I'm trying to make an inventory which opens when player joins a server, but i get an internal error instead.

Code:

Code:java

 public void onPlayerJoinEvent(PlayerJoinEvent e) {
Player p = e.getPlayer();
if (p.getGameMode() != GameMode.CREATIVE) {
Inventory chooseSever = Bukkit.createInventory(p, 27, "Choose your server");
 
ItemStack server1book = new ItemStack(Material.BOOK, 1);
List<String> ls = new ArrayList<String>();
ls.set(0,"§bthem Info will come here");
chooseClass.setItem(2, setName(server1book, "§aserver1", ls));
 
ItemStack server2book = new ItemStack(Material.BOOK, 1);
ls.set(0,"§bthem Info will come here");
chooseClass.setItem(3, setName(server2book, "§aserver2", ls));
 
ItemStack server3book = new ItemStack(Material.BOOK, 1);
ls.set(0,"§bthem Info will come here");
chooseClass.setItem(4, setName(server3book, "§aserver3", ls));
 
ItemStack server4book = new ItemStack(Material.BOOK, 1);
ls.set(0,"§bthem Info will come here");
chooseClass.setItem(6, setName(server4book, "§aserver4", ls));
 
p.openInventory(chooseServer);
 
}
}

any help appreciated.

 

spurkle
Error log?

edit:
From what I see you define the Inventory "choosesever" (sic!) and then try to add items to "chooseclass".

Maybe you got a mixup there?

 

spurkle you are registering your Listener twice

 

Um... I am not.

Btw: If i comment out 'p.openInventory(chooseClass);' i can join the server.

 

spurkle

fireblast709 If that were the case, we'd have the bukkit PluginManager somewhere in the stacktrace.

No, I think the problem is that the PlayerJoinEvent is called before the player actually is on the server. So you cant open an inventory for him right away. Try scheduling a task to be executed after a few seconds to open the inventory. If my theory is correct, that should work.

 

spurkle I was too fast with my conclusions. It probably tries to open the inventory twice, once in your join listener and once through NMS (since it thinks your inventory is the one it needs to send as the player inventory, or at least that's my current guess)

Try scheduling a delayed task for the inventory open

 

I am not very familiar with schedulers, could you please correct me if i am doing something wrong?
Because it seems that i am doing this in a wrong was, cause the inventory wont even show up.

Code:java

 getServer().getScheduler().scheduleSyncDelayedTask(plugin, new Runnable() {
@Override
public void run() {
p.openInventory(chooseClass);
}
}, 20L);

 

spurkle
That should do it, if I'm not overlooking something. Be sure that p and chooseClass are both declared as final, so you can safely use them in your anonymous class.

 

spurkle should be fine. If you didn't already, make the inventory and p final.

 

Code:java

 final Player p = e.getPlayer();
if (p.getGameMode() != GameMode.CREATIVE) {
final Inventory chooseClass = Bukkit.createInventory(p, 27, "Choose your server"); 

Seems like. But the inventory wont show up.

 

spurkle No error messages this time? You can connect to the server?

 

I can connect to the server, but i have just noticed the error in console.

Code:

org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.ja
va:427) ~[craftbukkit174b.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.jav
a:62) ~[craftbukkit174b.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.j
ava:481) [craftbukkit174b.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.j
ava:466) [craftbukkit174b.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at net.minecraft.server.v1_7_R1.PlayerList.c(PlayerList.java:225) [craft
bukkit174b.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at net.minecraft.server.v1_7_R1.PlayerList.a(PlayerList.java:116) [craft
bukkit174b.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at net.minecraft.server.v1_7_R1.LoginListener.c(LoginListener.java:78) [
craftbukkit174b.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at net.minecraft.server.v1_7_R1.LoginListener.a(LoginListener.java:42) [
craftbukkit174b.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at net.minecraft.server.v1_7_R1.NetworkManager.a(NetworkManager.java:149
) [craftbukkit174b.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at net.minecraft.server.v1_7_R1.ServerConnection.c(SourceFile:134) [craf
tbukkit174b.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at net.minecraft.server.v1_7_R1.MinecraftServer.u(MinecraftServer.java:6
55) [craftbukkit174b.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at net.minecraft.server.v1_7_R1.DedicatedServer.u(DedicatedServer.java:2
50) [craftbukkit174b.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at net.minecraft.server.v1_7_R1.MinecraftServer.t(MinecraftServer.java:5
45) [craftbukkit174b.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java
:457) [craftbukkit174b.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:6
17) [craftbukkit174b.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
Caused by: java.lang.IllegalArgumentException: Plugin cannot be null
        at org.apache.commons.lang.Validate.notNull(Validate.java:203) ~[craftbu
kkit174b.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at org.bukkit.craftbukkit.v1_7_R1.scheduler.CraftScheduler.validate(Craf
tScheduler.java:391) ~[craftbukkit174b.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at org.bukkit.craftbukkit.v1_7_R1.scheduler.CraftScheduler.runTaskTimer(
CraftScheduler.java:120) ~[craftbukkit174b.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at org.bukkit.craftbukkit.v1_7_R1.scheduler.CraftScheduler.scheduleSyncR
epeatingTask(CraftScheduler.java:116) ~[craftbukkit174b.jar:git-Bukkit-1.7.2-R0.
2-b2974jnks]
        at org.bukkit.craftbukkit.v1_7_R1.scheduler.CraftScheduler.scheduleSyncD
elayedTask(CraftScheduler.java:100) ~[craftbukkit174b.jar:git-Bukkit-1.7.2-R0.2-
b2974jnks]
        at me.plugin.Essentials.Essentials.onPlayerJoinEvent(Essentials.java:28
9) ~[?:?]
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.7.0
_60]
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.7.0
_60]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1
.7.0_60]
        at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.7.0_60]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.ja
va:425) ~[craftbukkit174b.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        ... 14 more

 

spurkle

The "plugin" variable you pass to scheduleSyncDelayedTask is null

 

Ohh! Right. Stupid me, haha ;3

Okay, it works now. Thank you for your help

Code if someone might need it:

Code:java

            getServer().getScheduler().scheduleSyncDelayedTask(this, new Runnable() {
            @Override
            public void run() {
                      p.openInventory(chooseClass);
                    }
            }, 20);

 

spurkle
Glad to help. If your Problem as fixed, please mark the thread as solved.

 

How do i do that? I can't seem to find it.

 

spurkle Don't know. Never did that xD Today is my first day posting here.