[Solved]Unknown Error (null pointer exeption) AFTER plugin loading

In my Plugin i have the following error, i do something, but I don' t know when this happens and why maby someone has an Idea:

Code:

12:07:46 [SCHWERWIEGEND] Could not pass event PlayerInteractEvent to NoGamemodeC
heat
org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.ja
va:303)
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.jav
a:62)
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.j
ava:459)
        at org.bukkit.craftbukkit.event.CraftEventFactory.callPlayerInteractEven
t(CraftEventFactory.java:175)
        at org.bukkit.craftbukkit.event.CraftEventFactory.callPlayerInteractEven
t(CraftEventFactory.java:145)
        at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:889)
        at net.minecraft.server.Packet18ArmAnimation.handle(SourceFile:38)
        at net.minecraft.server.NetworkManager.b(NetworkManager.java:229)
        at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:113)
        at net.minecraft.server.NetworkListenThread.a(NetworkListenThread.java:7
8)
        at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:554)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:452)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:490)
Caused by: java.lang.NullPointerException
        at joba97.NoGamemodeCheat.main.PlayerListener.Open(PlayerListener.java:5
7)
        at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.ja
va:301)
        ... 12 more
>

And this is my Player Interact Class:

Code:

@EventHandler
    public void Open (PlayerInteractEvent event)  {
        String block = event.getClickedBlock().getType().toString();
        if ((block.equalsIgnoreCase("Dispenser") || block.equalsIgnoreCase("workbench") || block.equalsIgnoreCase("Chest") || block.equalsIgnoreCase("Furnace")) && event.getPlayer().getGameMode() == GameMode.CREATIVE && joba97.NoGamemodeCheat.main.main.adminmode.get(event.getPlayer()) == false && CheckWorld(event.getPlayer().getWorld().getName())) {
            event.setCancelled(true);
        }
    }

The whole plugin works, but there is this annoying error and i don't know, how to fix this...

 

event.getClickedBlock probably is null. If a player right clicks in the air, this event also fires. Find out if the player clicked a block by doing

Code:java

Action a = event.getAction();
if(a.equals(Action.RIGHT_CLICK_BLOCK)){
//code
}

It might be a bit different, I did this from my head.

 

Remove the space between Open and (PlayerInteractEvent event)

 

doesn't matter.

Why do you get the string of the type and then compare it instead of just using the enum values to compare?

 

Everything works fine with your version Lolmewn, but i decidet to just write

Code:

if (event.getPlayer().getGameMode() == GameMode.CREATIVE && joba97.NoGamemodeCheat.main.main.adminmode.get(event.getPlayer()) == false && CheckWorld(event.getPlayer().getWorld().getName())) {
//code
}

Now i have an other question: what means this error:

Code:

14:45:30 [INFORMATION] [FunnyThings] enabled!
14:45:30 [INFORMATION] Server permissions file permissions.yml is empty, ignorin
g it
14:45:30 [SCHWERWIEGEND] java.lang.NullPointerException
14:45:30 [SCHWERWIEGEND]        at org.bukkit.craftbukkit.help.SimpleHelpMap.ini
tializeCommands(SimpleHelpMap.java:120)
14:45:30 [SCHWERWIEGEND]        at org.bukkit.craftbukkit.CraftServer.enablePlug
ins(CraftServer.java:240)
14:45:30 [SCHWERWIEGEND]        at net.minecraft.server.MinecraftServer.t(Minecr
aftServer.java:374)
14:45:30 [SCHWERWIEGEND]        at net.minecraft.server.MinecraftServer.a(Minecr
aftServer.java:361)
14:45:30 [SCHWERWIEGEND]        at net.minecraft.server.MinecraftServer.init(Min
ecraftServer.java:187)
14:45:30 [SCHWERWIEGEND]        at net.minecraft.server.MinecraftServer.run(Mine
craftServer.java:425)
14:45:30 [SCHWERWIEGEND]        at net.minecraft.server.ThreadServerApplication.
run(SourceFile:490)
14:45:30 [SCHWERWIEGEND] Unexpected exception
java.lang.NullPointerException
        at org.bukkit.craftbukkit.help.SimpleHelpMap.initializeCommands(SimpleHe
lpMap.java:120)
        at org.bukkit.craftbukkit.CraftServer.enablePlugins(CraftServer.java:240
)
        at net.minecraft.server.MinecraftServer.t(MinecraftServer.java:374)
        at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:361)
        at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:187)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:425)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:490)

This only happens, when I use the plugin "FunnyThings", but it is already enabled. Do you have an idea what this could be or do you need more information?

kumpelblase2
It has a reason why i did it...

JoBi9

Ps: how do you make Java code

 

You mind telling why?

Code:

[syntax=java][/syntax]

 

Im sorry, i was just writing a post in a different forum and someone asked a similar question... You are right, it doesn' t makes much sense, but do you have an idea how to fix my bug, or causes my bug?

 

Not really no. There could be some reasons, but I'm not totally sure.

 

should i post my main class for you?

 

It is caused by: Caused by: java.lang.NullPointerException
Sorry if it did not help.

 

thats not realy helping...

 

has nobody an answer?

 

Here is a start. Whatever you did to create the NPE; is where you need to look. whatever you did is causing SOMETHING in your code to be null; not existing.

 

Two realy good plugin programmer had already seen my code; it should be clean. Anywhay the bug happens, when the Plugin is full loaded and prevents the full server to start.

 

There are 2 possible cases:
- it's a CraftBukkit bug (since it throws a NPE in SimpleHelpMap)
- you registrate your commands wrong.

If you don't register any commands, then it's a CB bug.

 

Ok, it works now! It was a mistake in the command registration...