error: package net.minecraft.item does not exist import net.minecraft.item.ItemGroup;

[parkat]

I am new to modding and I'm sure this is a simple fix but I cannot for the life of me figure out why this error is thrown. 

I am running forge-1.17.1-37.0.90 and all other aspects seem to be working fine

I am following this tutorial https://thebookofmodding.ml/adding-custom-items/

here is my code (sorry its messy rn) [registryhandler class]

https://imgur.com/a/EGC2jyj

package com.example.examplemod;

import net.minecraft.item.ItemGroup;
import net.minecraft.world.item.Item;
import net.minecraftforge.fml.javafmlmod.FMLJavaModLoadingContext;
import net.minecraftforge.fmllegacy.RegistryObject;
import net.minecraftforge.registries.DeferredRegister;
import net.minecraftforge.registries.ForgeRegistries;
/*
public class RegistryHandler {
    // create DeferredRegister object
    public static final DeferredRegister<Item> ITEMS = DeferredRegister.create(ForgeRegistries.ITEMS, ExampleMod.MODID);

    public static void init() {
        // attach DeferredRegister to the event bus
        ITEMS.register(FMLJavaModLoadingContext.get().getModEventBus());
    }

    // register item
   public static final RegistryObject<Item> COPPER = ITEMS.register("copper", () ->
        //    new Item(new Item.Properties().group(ItemGroup.MATERIALS))
       //     );
                new Item(
                    new Item.Properties().group(ItemGroup.MATERIALS)
           )
    );

 */
    public class RegistryHandler {
        public static final DeferredRegister<Item> ITEMS = DeferredRegister.create(ForgeRegistries.ITEMS, ExampleMod.MODID);

        public static void init() {
            // attach DeferredRegister to the event bus
            ITEMS.register(FMLJavaModLoadingContext.get().getModEventBus());
        }

        public static final RegistryObject<Item> TITAN = ITEMS.register("titan",
                ()-> new Item(new Item.Properties().group(ItemGroup.REDSTONE)));
    }

 

Edited October 18 by parkat

[izofar]

ItemGroup belongs to the net.minecraft.item package, not "items"

[parkat]

1 hour ago, izofar said:

ItemGroup belongs to the net.minecraft.item package, not "items"

that doesn't work either 

[Luis_ST]

Forge use now Mojang class names and their package names, you can use the Forge bot on discord to convert from mcp to moj mappings 

But I would recommend you to use this scrip it will update your hole project automatically 

Edited October 19 by Luis_ST

[parkat]

12 hours ago, Luis_ST said:

Forge use now Mojang class names and their package names, you can use the Forge bot on discord to convert from mcp to moj mappings 

But I would recommend you to use this scrip it will update your hole project automatically 

thank you! this works!!