So, with this new weird 1.12 API, I can't manage to get items to work.

I have been messing around but can't seem to find my problem.

Item Class:

package MoBuildingBlocks.Items;
import net.minecraft.item.Item;
import net.minecraft.item.ItemSword;
import net.minecraftforge.event.RegistryEvent;

public class ItemSaw extends ItemSword {
	public static Item ItemSaw;
	public static void registerItems(RegistryEvent.Register<Item> event) {
        event.getRegistry().register(ItemSaw=new ItemSword(Item.ToolMaterial.IRON).setUnlocalizedName("saw").setRegistryName("mobuildingblocks","saw"));
	}
        public ItemSaw(ToolMaterial material) {
		super(material);
	}
}

Common Proxy:

package MoBuildingBlocks.Proxy;

import net.minecraft.item.Item;
import net.minecraft.item.Item.ToolMaterial;
import net.minecraftforge.event.RegistryEvent;
import net.minecraftforge.fml.common.event.FMLInitializationEvent;
import net.minecraftforge.fml.common.event.FMLPostInitializationEvent;
import net.minecraftforge.fml.common.event.FMLPreInitializationEvent;
import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
import MoBuildingBlocks.Items.ItemSaw;
import MoBuildingBlocks.Registrys.RegistryHandler;

public class CommonProxy {

	public void preInit(FMLPreInitializationEvent event) {
		RegistryHandler.Common();
	}
	public void Init(FMLInitializationEvent event) {
		
	}
	public void postInit(FMLPostInitializationEvent event) {
		
	}
	@SubscribeEvent
    public static void registerItems(RegistryEvent.Register<Item> event, ToolMaterial material) {
        event.getRegistry().register(new ItemSaw(material));
	}
}

Item Registry:

package MoBuildingBlocks.Registrys;

import net.minecraftforge.fml.common.registry.GameRegistry;
import MoBuildingBlocks.Items.ItemSaw;

public class ItemRegistry {
    @GameRegistry.ObjectHolder("mbb:saw")
    public static ItemSaw saw;
}

That's all the classes I have to do with the item, nothing in my main class except the PreInit, Init, and PostInit, and my ClientProxy is the same.

The mod name is Mo' Building Blocks, the mod ID is mbb, the item is called Saw, the texture is in a folder called Items and it is called Saw.

You need to either register the event in preinit or annotate the class with  @Mod.EventBusSubscriber

event.getRegistry().register(ItemSaw=new ItemSword(...

event.getRegistry().register(new ItemSaw(...

Wot. Why do you have two different RegistryEvent handlers? Not that either one of them is actually subscribed to the event bus.

Oh, lol I just realized that. I saw the subscribe thing when looking through examples but forgot that I registered both of them register it... darp

Edited September 3, 20178 yr by Big_Bad_E
Grammer...

Still not working...

Item Class:

package MoBuildingBlocks.Items;
import net.minecraft.item.Item;
import net.minecraft.item.ItemSword;
import net.minecraftforge.event.RegistryEvent;
import net.minecraftforge.fml.common.Mod;

@Mod.EventBusSubscriber
public class ItemSaw extends Item {
	public static Item ItemSaw;
	public static void registerItems(RegistryEvent.Register<Item> event) {
        event.getRegistry().register(ItemSaw=new Item().setUnlocalizedName("saw").setRegistryName("mobuildingblocks","saw"));
	}
        public ItemSaw(ToolMaterial material) {
		super();
	}
}

I removed the register thing from my proxy

Item Registry:

package MoBuildingBlocks.Registrys;

import net.minecraftforge.fml.common.registry.GameRegistry;
import MoBuildingBlocks.Items.ItemSaw;

public class ItemRegistry {
    @GameRegistry.ObjectHolder("mbb:saw")
    public static ItemSaw saw;
}

I have no other things related to the item in my other classes, which I may need it in one .-.

Also if anyone knows what to do in my event.getRegistry to put it in a creative tab

If you're using @GameRegistry.ObjectHolder then you don't need to do this: ItemSaw=

The whole point of ObjectHolder annotations is to set the field for you.