ok so im made an item that basically returns an itemstack whenever its rightclicked. as well as a chat message, problem is it registers twice ingame, so I get a double message, how can I fix this? any help is greatly appreciated thank you.

 

OnItemRightclick method:

	public ItemStack onItemRightClick(ItemStack itemstack, World world,
		EntityPlayer player) {

	if (player.capabilities.isCreativeMode
			|| player.inventory.consumeInventoryItem(Items.redstone))

	{
		world.playSoundAtEntity(player, "random.fizz", 0.7f, 0.8f);

		if (!world.isRemote) {

			world.spawnEntityInWorld(new EntityBullet(world, player));

		}
	}
	if (player.isSneaking()) {

		player.addChatMessage(new ChatComponentText(
				"Ballistae -- Sniper Mode"));
		return new ItemStack(ModItems.BoomStickSniperMode);
	}

	return itemstack;
}

}

you are adding the chat msg on server and client side. thats why its cmng twice. you are also adding an item on client side, which is a bad idea

so, if(!world.isRemote) sets it serverside? just asking, im Pretty sure it does, like almost 89% positive. anyways doing this worked thanks.

so, if(!world.isRemote) sets it serverside?

Yes, it does.

k cool,