Ok so, when using some prints to debug my code, I noticed that the onCreated method is called twice on the server. I do not understand how this is possible considering it should only be called once and, if it is called twice it should be on for server then one for client right? I do check if it is the server world and, when I don't, it is called twice for server and client. I really need some help here; here's my code:

 

public void onCreated(ItemStack stack, World world, EntityPlayer player) {
	if(!world.isRemote) {
		System.out.println("THE STACK: " + stack);

		NBTTagCompound cmp = stack.getTagCompound();

		System.out.println("THE TAG: " + cmp);

		if(cmp == null) {
			System.out.println("NEW TAG");

			cmp = new NBTTagCompound();
			cmp.setString("MiningSize", "3x3");

			stack.setTagCompound(cmp);
		}

		System.out.println(cmp);
		System.out.println(stack.getTagCompound());
	}
}

You probably have two instances of the class. Is this an item? Did you register two with that class? Did you extend the class and instantiate a subclass?

It is an Item but, it extends ItemPickaxe so it can mine blocks and also, has a ToolMaterial. I only registered one item with that class. And what do you mean by the last question?

And what do you mean by the last question?

 

class MySuperPick extends MyItemPickaxeClass

Um, no I have not done anything like that.

Is there anything else that could be causing this?

So, I decided to add a "System.out.println(Thread.getCurrentThread().getName())" at the start of the onCreated method and got this:

[21:32:04] [Client thread/INFO] [sTDOUT]: [com.happykiller.crewmod.items.tools.CrewHammer:onCreated:38]: Client thread
[21:32:04] [Client thread/INFO] [sTDOUT]: [com.happykiller.crewmod.items.tools.CrewHammer:onCreated:38]: Client thread
[21:32:04] [server thread/INFO] [sTDOUT]: [com.happykiller.crewmod.items.tools.CrewHammer:onCreated:38]: Server thread
[21:32:04] [server thread/INFO] [sTDOUT]: [com.happykiller.crewmod.items.tools.CrewHammer:onCreated:41]: THE STACK: 0xitem.CrewHammer@0
[21:32:04] [server thread/INFO] [sTDOUT]: [com.happykiller.crewmod.items.tools.CrewHammer:onCreated:45]: THE TAG: null
[21:32:04] [server thread/INFO] [sTDOUT]: [com.happykiller.crewmod.items.tools.CrewHammer:onCreated:48]: NEW TAG
[21:32:04] [server thread/INFO] [sTDOUT]: [com.happykiller.crewmod.items.tools.CrewHammer:onCreated:56]: {MiningSize:"3x3",}
[21:32:04] [server thread/INFO] [sTDOUT]: [com.happykiller.crewmod.items.tools.CrewHammer:onCreated:57]: {MiningSize:"3x3",}
[21:32:04] [server thread/INFO] [sTDOUT]: [com.happykiller.crewmod.items.tools.CrewHammer:onCreated:38]: Server thread
[21:32:04] [server thread/INFO] [sTDOUT]: [com.happykiller.crewmod.items.tools.CrewHammer:onCreated:41]: THE STACK: 0xitem.CrewHammer@0
[21:32:04] [server thread/INFO] [sTDOUT]: [com.happykiller.crewmod.items.tools.CrewHammer:onCreated:45]: THE TAG: {MiningSize:"3x3",}
[21:32:04] [server thread/INFO] [sTDOUT]: [com.happykiller.crewmod.items.tools.CrewHammer:onCreated:56]: {MiningSize:"3x3",}
[21:32:04] [server thread/INFO] [sTDOUT]: [com.happykiller.crewmod.items.tools.CrewHammer:onCreated:57]: {MiningSize:"3x3",}

 

When the method is first called, it displays two client threads and, one server thread. Then, on the second pass, just one server thread. Does this mean something?