I'm doing this, but I don't know what to put in new ItemStack(), when it comes to my custom items
@SubscribeEvent
public static void onJacketSpawn(EntityJoinWorldEvent event)
{
if (!(event.getEntity() instanceof EntityMasterJacket))
{
return;
}
EntityMasterJacket mj = (EntityMasterJacket) event.getEntity();
mj.setItemStackToSlot(EntityEquipmentSlot.MAINHAND, new ItemStack());
}