How do I create a creative tab and add vanilla Minecraft items and blocks to it in a certain order?

[X66Herobrine66X]

Trying to recreate the 1.19.3 creative changes in my mod. I know the basics of Java but I usually code with MCreator so if you could walk me through it that'd be great.

I found this link in an old thread, but it looks like it's outdated. Also I don't really understand whether I would have added that code to my existing creative tab class or have it as it's own separate class. Either way I had difficulties figuring out what each thing was.

 

[warjort]

The default processing asks each item to add its relevant ItemStacks to a list in the order in which the Items were registered.

You override the method that does this in your custom CreativeModeTab.  e.g. (untested code)

    public static CreativeModeTab MY_CREATIVE_MODE_TAB = new CreativeModeTab("whatever") {

        @Override
        public void fillItemList(NonNullList<ItemStack> list) {
            // Default processing fills the list
            super.fillItemList(list);
            // Manipulate the list, e.g. sort by reverse order of rarity
            list.sort(Comparator.comparing(ItemStack::getRarity).reversed());
        }

        @Override
        public ItemStack makeIcon() {
            return Items.DIAMOND.getDefaultInstance();
        }
    };

 

Edited November 10, 2022 by warjort

[X66Herobrine66X]

  On 11/10/2022 at 3:33 PM, warjort said:

The default processing asks each item to add its relevant ItemStacks to a list in the order in which the Items were registered.

You override the method that does this in your custom CreativeModeTab.  e.g. (untested code)

    public static CreativeModeTab MY_CREATIVE_MODE_TAB = new CreativeModeTab("whatever") {

        @Override
        public void fillItemList(NonNullList<ItemStack> list) {
            // Default processing
            super.fillItemList(list);
            // Manipulate the list, e.g. sort by reverse order of rarity
            list.sort(Comparator.comparing(ItemStack::getRarity).reversed());
        }

        @Override
        public ItemStack makeIcon() {
            return Items.DIAMOND.getDefaultInstance();
        }
    };

 

Expand  

Ok that's worked so far, but I'm trying to add specific blocks in a specific order. This is my code so far:
 

package net.angelofcreation.randomshit.item;

import com.google.common.collect.Ordering;
import net.minecraft.core.NonNullList;
import net.minecraft.world.item.CreativeModeTab;
import net.minecraft.world.item.Item;
import net.minecraft.world.item.ItemStack;
import net.minecraft.world.level.block.Blocks;
import net.minecraftforge.common.Tags;

import java.util.Arrays;
import java.util.Comparator;
import java.util.List;

public class ModCreativeModeTab {

    static Comparator<ItemStack> tabSorter;

    public static final CreativeModeTab BUILDING_BLOCKS = new CreativeModeTab("building_block") {

        @Override
        public void fillItemList(NonNullList<ItemStack> list) {
            // Default processing
            super.fillItemList(list);
            // Manipulate the list, e.g. sort by reverse order of rarity
            list.sort(Comparator.comparing(ItemStack::getRarity).reversed());
        }

        @Override
        public ItemStack makeIcon() {
            return new ItemStack(Blocks.BRICKS);
        }

        void preInit() {
            List<Item> order = Arrays.asList();
            tabSorter = Ordering.explicit(order).onResultOf(ItemStack::getItem);
        }

    };
}

The problem I'm now running into is what to put in Arrays.asList. The link I'm going off of for this section says "List<Item> order = Arrays.asList(myItemA, myItemB, Item.getItemFromBlock(myBlockA), ...);" What would 'myItemA' be? What if it's a vanilla item I want to add?

[MistaOmega]

  On 11/10/2022 at 3:51 PM, X66Herobrine66X said:

Ok that's worked so far, but I'm trying to add specific blocks in a specific order. This is my code so far:
 

The problem I'm now running into is what to put in Arrays.asList. The link I'm going off of for this section says "List<Item> order = Arrays.asList(myItemA, myItemB, Item.getItemFromBlock(myBlockA), ...);" What would 'myItemA' be? What if it's a vanilla item I want to add?

Expand  

'myItemA' would be the item reference you want.

So obsidian would be: Item i = Items.OBSIDIAN;

Edited November 10, 2022 by MistaOmega

[X66Herobrine66X]

  On 11/10/2022 at 4:29 PM, MistaOmega said:

'myItemA' would be the item reference you want.

So obsidian would be: Item i = Items.OBSIDIAN;

Expand  

Thank you. This is the code that I've come up with:

package net.angelofcreation.randomshit;

import com.google.common.collect.Ordering;
import net.minecraft.core.NonNullList;
import net.minecraft.world.item.Item;
import net.minecraft.world.item.Items;
import net.minecraft.world.level.block.Blocks;
import net.minecraft.world.item.ItemStack;
import net.minecraft.world.item.CreativeModeTab;

import java.util.Arrays;
import java.util.Comparator;
import java.util.List;

public class CreativechangesModTabs {

    static Comparator<ItemStack> tabSorter;

    public static CreativeModeTab TAB_BUILDING_BLOCKS;

    public static void load() {
        TAB_BUILDING_BLOCKS = new CreativeModeTab("tabbuilding_blocks") {


            @Override
            public void fillItemList(NonNullList<ItemStack> list) {
                List<Item> order = Arrays.asList(Items.OAK_LOG, Items.OAK_WOOD, Items.STRIPPED_OAK_LOG, Items.STRIPPED_OAK_WOOD);
                tabSorter = Ordering.explicit(order).onResultOf(ItemStack::getItem);
                super.fillItemList(list);
                list.sort(tabSorter);
            }

            @Override
            public ItemStack makeIcon() {
                return new ItemStack(Blocks.BRICKS);
            }
        };
    }
}

Unfortunately, the creative tab does not have any of the 4 items I specified. Do you know why this is and how I can fix it?

[MistaOmega]

 

  On 11/10/2022 at 4:34 PM, X66Herobrine66X said:

Thank you. This is the code that I've come up with:

package net.angelofcreation.randomshit;

import com.google.common.collect.Ordering;
import net.minecraft.core.NonNullList;
import net.minecraft.world.item.Item;
import net.minecraft.world.item.Items;
import net.minecraft.world.level.block.Blocks;
import net.minecraft.world.item.ItemStack;
import net.minecraft.world.item.CreativeModeTab;

import java.util.Arrays;
import java.util.Comparator;
import java.util.List;

public class CreativechangesModTabs {

    static Comparator<ItemStack> tabSorter;

    public static CreativeModeTab TAB_BUILDING_BLOCKS;

    public static void load() {
        TAB_BUILDING_BLOCKS = new CreativeModeTab("tabbuilding_blocks") {


            @Override
            public void fillItemList(NonNullList<ItemStack> list) {
                List<Item> order = Arrays.asList(Items.OAK_LOG, Items.OAK_WOOD, Items.STRIPPED_OAK_LOG, Items.STRIPPED_OAK_WOOD);
                tabSorter = Ordering.explicit(order).onResultOf(ItemStack::getItem);
                super.fillItemList(list);
                list.sort(tabSorter);
            }

            @Override
            public ItemStack makeIcon() {
                return new ItemStack(Blocks.BRICKS);
            }
        };
    }
}

Unfortunately, the creative tab does not have any of the 4 items I specified. Do you know why this is and how I can fix it?

Expand  

Because you're not pushing anything into the super.

The super looks like it wants a NonNullList of ItemStacks. So create a list of ItemStacks, you can create an ItemStack with an item via: ItemStack stack = new ItemStack(Items.OBSIDIAN);
Then I'd send that list that you make into the super.fillItemList.

list.sort only serves to modify the order of the list, you need to ensure that what you create and manipulate you send to the super. If you're unsure what super is for, refer to this link here: https://www.w3schools.com/java/ref_keyword_super.asp

Edited November 10, 2022 by MistaOmega

[X66Herobrine66X]

  On 11/10/2022 at 4:39 PM, MistaOmega said:

 

Because you're not pushing anything into the super.

The super looks like it wants a NonNullList of ItemStacks. So create a list of ItemStacks, you can create one via it's constructor. E.G: ItemStack stack = new ItemStack(Items.OBSIDIAN);
Then I'd send that list that you make into the super.fillItemList.

list.sort only serves to modify the order of the list, you need to ensure that what you create and manipulate you send to the super. If you're unsure what super is for, refer to this link here: https://www.w3schools.com/java/ref_keyword_super.asp

Expand  

Does this look right? It's crashing my game when I click on the tab:
 

package net.angelofcreation.randomshit;

import com.google.common.collect.Ordering;
import net.minecraft.core.NonNullList;
import net.minecraft.world.item.Item;
import net.minecraft.world.item.Items;
import net.minecraft.world.level.block.Blocks;
import net.minecraft.world.item.ItemStack;
import net.minecraft.world.item.CreativeModeTab;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Comparator;
import java.util.List;

public class CreativechangesModTabs {

    static Comparator<ItemStack> tabSorter;

    public static CreativeModeTab TAB_BUILDING_BLOCKS;

    public static void load() {
        TAB_BUILDING_BLOCKS = new CreativeModeTab("tabbuilding_blocks") {


            @Override
            public void fillItemList(NonNullList<ItemStack> list) {
                // Create list of itemstacks
                List<ItemStack> itemList = new ArrayList<ItemStack>();
                
                // Add itemstacks to list
                itemList.add(new ItemStack(Items.OAK_LOG));
                itemList.add(new ItemStack(Items.OAK_WOOD));
                itemList.add(new ItemStack(Items.STRIPPED_OAK_LOG));
                itemList.add(new ItemStack(Items.STRIPPED_OAK_WOOD));

                // set list to itemList
                list = (NonNullList<ItemStack>) itemList;

                // sort list
                List<Item> order = Arrays.asList(Items.OAK_LOG.asItem(), Items.OAK_WOOD.asItem(), Items.STRIPPED_OAK_LOG.asItem(), Items.STRIPPED_OAK_WOOD.asItem());
                tabSorter = Ordering.explicit(order).onResultOf(ItemStack::getItem);
                list.sort(tabSorter);
                
                // add list to super
                super.fillItemList(list);
            }

            @Override
            public ItemStack makeIcon() {
                return new ItemStack(Blocks.BRICKS);
            }
        };
    }
}

 

[MistaOmega]

Don't do all that new list stuff, all that casting and so on is bound to make an error, also, call your super first

 

                // add list to super
                super.fillItemList(list);

                // Add itemstacks to list
                list.add(new ItemStack(Items.OAK_LOG));
                list.add(new ItemStack(Items.OAK_WOOD));
                list.add(new ItemStack(Items.STRIPPED_OAK_LOG));
                list.add(new ItemStack(Items.STRIPPED_OAK_WOOD));


                // sort list
                List<Item> definedOrder = Arrays.asList(Items.OAK_LOG.asItem(), Items.OAK_WOOD.asItem(), Items.STRIPPED_OAK_LOG.asItem(), Items.STRIPPED_OAK_WOOD.asItem());
                Comparator<ItemStack> tabSorter;tabSorter = Ordering.explicit(definedOrder).onResultOf(ItemStack::getItem);
                list.sort(tabSorter);
                

this should do it, after testing it shows up with what you want

Edited November 10, 2022 by MistaOmega