Getting an error, but the code still works.

Hello everyone.
Getting one problem:

Code:

2012-08-17 22:18:55 [SEVERE] Could not pass event InventoryOpenEvent to Condenser
org.bukkit.event.EventException
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:332)
    at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
    at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:477)
    at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:462)
    at org.bukkit.craftbukkit.event.CraftEventFactory.callInventoryOpenEvent(CraftEventFactory.java:494)
    at net.minecraft.server.EntityPlayer.openContainer(EntityPlayer.java:505)
    at net.minecraft.server.BlockChest.interact(SourceFile:291)
    at net.minecraft.server.ItemInWorldManager.interact(ItemInWorldManager.java:340)
    at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:649)
    at net.minecraft.server.Packet15Place.handle(SourceFile:58)
    at net.minecraft.server.NetworkManager.b(NetworkManager.java:281)
    at net.minecraft.server.NetServerHandler.d(NetServerHandler.java:109)
    at net.minecraft.server.ServerConnection.b(SourceFile:35)
    at net.minecraft.server.DedicatedServerConnection.b(SourceFile:30)
    at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:583)
    at net.minecraft.server.DedicatedServer.q(DedicatedServer.java:212)
    at net.minecraft.server.MinecraftServer.p(MinecraftServer.java:476)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:408)
    at net.minecraft.server.ThreadServerApplication.run(SourceFile:539)
Caused by: java.lang.NullPointerException
    at me.nipples.com.Condenser.InventoryOpen(Condenser.java:76)//ERROR
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.bukkit.p

Code:

if (block.getType() == Material.CHEST) {
for (Block b : SurroundingBlocks(block)){
if (CheckBlock(b)){
if (b.isBlockIndirectlyPowered()){
for (ItemStack item : chest) {
handemc = new Integer(item_in_hand.getTypeId()).toString();
blockemc = new Integer(item.getTypeId()).toString(); //THIS LINE
handemc = getConfig().getString(handemc);
blockemc = getConfig().getString(blockemc);
      player.getServer().getPlayer(player.getName()).sendMessage(blockemc);
totalemc = totalemc + Integer.parseInt(blockemc);
}
      player.getServer().getPlayer(player.getName()).sendMessage(Integer.toString(totalemc));
}
}
}
}

But the funny thing is, it still converts it to a string.
What is going on?

 

You need to check if item is null before trying to call methods on it.

 

what do you meen by that i am having that problem to it all works but right when
i right click this item it will shoot the fireball but give all those errors on the console

 

You're looping though all items from the chest... but if any slot from that chest is empty, the item will be null... and you can't call methods on null objects.

Code:

if(item == null)
   continue;

 

T

Thanks for this.

/Thread closed.