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Removing Vanilla Stuff???


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I was inspired by the game Farcry Primal to create a Minecraft mod similar to it, mainly only implementing the Stone Age survival concept. However, to do this, some mobs things must be removed because they don't fit in. For example, zombies, creepers, endermen, skeletons, spiders, cave spiders, silverfish, iron weapons, pickaxes, and basically everything else in Minecraft. In other words, I'm attempting to turn Minecraft into another game by adding a mod. 

I'm pretty sure that I have to call EntityJoinWorldEvent to replace entities (from what I've read from modder forums), but I'm not sure how to use it to REMOVE entities. 

Furthermore, I need a way to remove/replace ITEMS in Minecraft, because the stone age didn't have iron weapons (or swords, pickaxes, etc.).

And finally, I need a way to remove villages and structures, although this one I can just suggest that the player turns it off. 

I feel like this is a lot, but I know that other mods have done stuff like this, so therefore it's possible. 

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I will be answering with 1.12.2 in mind. Please clarify if you are using 1.13, as some things will not work as easily.

 

  • EntityJoinWorldEvent can be cancelled, which will prevent the entity from spawning.
  • To "disable" an item you can:
    1. Hide it from the creative menu (Item#setCreativeTab(null)).
    2. Disable all recipes that produce this item, ForgeRegistries.RECIPES is a IForgeRegistryModifiable, which means you can remove those recipes from it.
    3. Disable all furnace recipes that produce this item, remove them from FurnaceRecipes#getSmeltingList

The problem with this however is that machines from other mods might still produce this item in other ways.

  • To disable structures you can use InitMapGenEvent to override their generator with a no-op generator (i.e. one that does not generate anything).
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How would I go about canceling the EntityJoinWorldEvent? Can you give an example of how to format it? 

I was looking here for examples so I could get a basic idea of how to use it and formulate a complete "Event Handler" as I understand it's called (https://www.programcreek.com/java-api-examples/?class=net.minecraftforge.event.entity.EntityJoinWorldEvent&method=setCanceled), but I figure if I can see one designed specifically for my problem, I may have a much better time solving it. 

 

This is what I have so far... 

public class RemoveStuff {

//Removes all entities upon spawning// 
     @SubscribeEvent(priority = EventPriority.HIGHEST)
     public void OnEntitySpawn(EntityJoinWorldEvent event) {
          
          if (event.getEntity() instanceof /*/WHATEVER ENTITY/*/) {
          
          }
                event.setCanceled(boolean true);

     }

Am I close? 

 

Furthermore, how do I call on the item to set it's creative tab to null? Is that what the hashtag is for? To let you know where to specify what said Item/Event is? 

Edited by perigrine3
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1 hour ago, perigrine3 said:

Thank you a lot, but I have another question; what are the # hashtags for? I've seen them a lot in other forums and modding assistance, but I have no clue what they mean? 

It means that the field or method isn't static

Edited by Draco18s
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Double colons (e.g. SomeClass::SomeMethod) has a similar meaning, but I'll be honest that I haven't seen the distinction clarified for me. Just pointing out that you might see that sometimes too.

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4 hours ago, perigrine3 said:

This is what I have so far... 


public class RemoveStuff {

//Removes all entities upon spawning// 
     @SubscribeEvent(priority = EventPriority.HIGHEST)
     public void OnEntitySpawn(EntityJoinWorldEvent event) {
          
          if (event.getEntity() instanceof /*/WHATEVER ENTITY/*/) {
          
          }
                event.setCanceled(boolean true);

     }

Am I close? 

 

Your class isn’t annotated with @EventBusSubscriber and your method isn’t static so everything should work, but here’s this just in case.41725BB5-4DE4-43D5-8631-B167988B66E8.jpeg.ff334db72bec7b270c5d27f4f710e32f.jpeg

 

You want the method Event#setCancelled(boolean) which translates to the code event.setCancelled(true/false);

 

Your method should also begin with a lowercase (onEntitySpawn rather than OnEntitySpawn) and probably should be called onEntityJoinWorld because it’s not the same as spawning.

 

 

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Alright, that makes sense, and I'm glad that this is working out so well so far. 

Now to move on to disabling the items: 

 
 
 
 
 
 
On 4/21/2019 at 8:22 AM, diesieben07 said:

Hide it from the creative menu (Item#setCreativeTab(null)).

So I assume that the code for this looks like item.setCreativeTab(null), but what I am wondering is how do I get specific items to hide? How do I reference them in a get statement? My first guess would be to use an "if" statement, like the one in my "onEntityJoin" event. Here's what I'm thinking: 

     public void hideCreativeItems(String item) {
          if (item.getItem() instanceof /*/WHATEVER ITEM/*/) {
          }
                item.setCreativeTab(null);
     }

I'm probably wrong about the string part because I'm still unsure as to how to use those. 

Please fix my code as necessary. 

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I'm probably wrong again, but what the heck. Are either of these correct? 

1) 

     @SubscribeEvent
     public void setCreativeTab(IForgeRegistry item) {
          ForgeRegistries.ITEMS.setCreativeTab(null); 
     }

2) 

     @SubscribeEvent
     public Item setCreativeTab(CreativeTabs tab) {
          ForgeRegistries.ITEMS.setCreativeTab(null); 
     }

 

If not, please tell me why not, and if so, please tell me why. 

Also, what are the constants of Items.class? Could you give a link?

Edited by perigrine3
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Neither, because neither method takes a parameter of type Event

Neither, because neither is a startup even method (preInit, Init, postInit)

Neither, because neither method correctly uses the Items registry (which item are you changing?)

The second one also declares a return type that is both unneeded and never returned. 

 

Quote

Also, what are the constants of Items.class?

Items.BREAD, Items.REDSTONE_DUST, Items.CAKE

etc

Edited by Draco18s

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Look net.minecraft.item.Items or net.minecraft.forge.ForgeRegistries. Your mod should have something like the first one. The event in the argument is needed to call the method when the event fires. For example, a game wants to spawn a mob, an event fires and calls your method. If you do not have an event in the method, it will not be called. It seems something like that, but I could be wrong.

If I helped you, don't forget like. I'm using a translator, sorry.

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46 minutes ago, perigrine3 said:

Then how would I use the items registry correctly?

Items.BREAD.setCreativeTab(null)

Is the same as

ForgeRegistries.ITEMS.get(new ResourceLocation("minecraft","bread"))

46 minutes ago, perigrine3 said:

Also, I figured it needed to be an event method. So like the event handler I made for repressing entities from spawning?

Yes. Well, probably. You need the right event type. 

49 minutes ago, Torq said:

The event in the argument is needed to call the method when the event fires. For example, a game wants to spawn a mob, an event fires and calls your method. If you do not have an event in the method, it will not be called. It seems something like that, but I could be wrong.

Sort of. The method signature needs to match in order for it to be called. If you don't have an Event type as the only parameter, then no event call will ever invoke your method because the signature would never match. 

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I found an event that should work I think. It would have to activate as soon as the game loads, without crashing it, so I chose "FMLPostInitializationEvent". Now what I'm doing is listing out all of the item's I need to remove. 

However, I also have some blocks to remove. Would I call on them by say "Blocks" instead of "Items"?

Edited by perigrine3
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4 hours ago, perigrine3 said:

However, I also have some blocks to remove. Would I call on them by say "Blocks" instead of "Items"?

Yes

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//Removes items from Creative Tabs// 
     @SubscribeEvent
     public void setCreativeTab(IForgeRegistry item) {
          ForgeRegistries.ITEMS.setCreativeTab(null); 

          Item.registerItems(FMLPostInitializationEvent event) {
          
/*/Swords/*/ {
          Items.IRON_SWORD.setCreativeTab(null); 
          Items.WOODEN_SWORD.setCreativeTab(null); 
          Items.STONE_SWORD.setCreativeTab(null); 
          Items.DIAMOND_SWORD.setCreativeTab(null); 
          Items.GOLDEN_SWORD.setCreativeTab(null); 
          }

I'm unsure as to how to correctly format this. Can somebody please show me what I'm doing wrong? 

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I don't think I understand it any better than I did before. 

//Removes items from Creative Tabs// 
     @SubscribeEvent
     public void hideFromCreative(FMLPostInitializationEvent event) {
          
/*/Swords/*/ {
          Item.IRON_SWORD.setCreativeTab(null); 
          Item.WOODEN_SWORD.setCreativeTab(null); 
          Item.STONE_SWORD.setCreativeTab(null); 
          Item.DIAMOND_SWORD.setCreativeTab(null); 
          Item.GOLDEN_SWORD.setCreativeTab(null); 
          }

If this is wrong, can someone PLEASE explain in Layman's terms how to fix it and why it is wrong? And can someone please give me an alternate solution? A different way to remove items and blocks from all creative tabs? Even just a way to repress the creative tabs would be fantastic. 

Edited by perigrine3
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6 hours ago, perigrine3 said:

     public void setCreativeTab(IForgeRegistry item) {
          ForgeRegistries.ITEMS.setCreativeTab(null); 

          Item.registerItems(FMLPostInitializationEvent event) {

Why do you have a method inside a method?

 

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I did but I got rid of that. 

//Removes items from Creative Tabs// 
     @SubscribeEvent
     public void hideFromCreative(FMLPostInitializationEvent event) {
          
/*/Swords/*/ {
          Item.IRON_SWORD.setCreativeTab(null); 
          Item.WOODEN_SWORD.setCreativeTab(null); 
          Item.STONE_SWORD.setCreativeTab(null); 
          Item.DIAMOND_SWORD.setCreativeTab(null); 
          Item.GOLDEN_SWORD.setCreativeTab(null); 
          }

This is what I have now. 

Edited by perigrine3
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1 hour ago, perigrine3 said:

I did but I got rid of that. 


//Removes items from Creative Tabs// 
     @SubscribeEvent
     public void hideFromCreative(FMLPostInitializationEvent event) {
          
/*/Swords/*/ {
          Item.IRON_SWORD.setCreativeTab(null); 
          Item.WOODEN_SWORD.setCreativeTab(null); 
          Item.STONE_SWORD.setCreativeTab(null); 
          Item.DIAMOND_SWORD.setCreativeTab(null); 
          Item.GOLDEN_SWORD.setCreativeTab(null); 
          }

This is what I have now. 

Please post your entire code; that extract of your code won't even compile.

Make sure you have valid event subscribers.

 

Correct me if I'm wrong, but I'm pretty sure FMLPostInitializationEvent is part of the FML lifecycle event thingy, thus it should be annotated with @EventHandler instead.

Edited by DavidM

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It's a lot of code, but here it is: 

public class removeStuff {

//Removes entities upon spawning// 
     //Dragon 
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntityDragon) {
          }
                event.setCanceled(true);
     }

     //Wither
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntityWither) {
          }
                event.setCanceled(true);
     }

     //Mooshroom
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntityMooshroom) {
          }
                event.setCanceled(true);
     }

     //Donkey
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntityDonkey) {
          }
                event.setCanceled(true);
     }

     //Pig
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntityPig) {
          }
                event.setCanceled(true);
     }

     //Mule
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntityMule) {
          }
                event.setCanceled(true);
     }

     //Sheep
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntitySheep) {
          }
                event.setCanceled(true);
     }

     //ZombieHorse
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntityZombieHorse) {
          }
                event.setCanceled(true);
     }

     //Chicken
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntityChicken) {
          }
                event.setCanceled(true);
     }

     //Bat
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntityBat) {
          }
                event.setCanceled(true);
     }

     //Squid
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntitySquid) {
          }
                event.setCanceled(true);
     }

     //Cow
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntityCow) {
          }
                event.setCanceled(true);
     }

     //Villager
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntityVillager) {
          }
                event.setCanceled(true);
     }

     //Horse
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntityHorse) {
          }
                event.setCanceled(true);
     }

     //Llama
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntityLlama) {
          }
                event.setCanceled(true);
     }

     //SkeletonHorse
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntitySkeletonHorse) {
          }
                event.setCanceled(true);
     }

     //Parrot
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntityParrot) {
          }
                event.setCanceled(true);
     }

     //Wolf
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntityWolf) {
          }
                event.setCanceled(true);
     }

     //Rabbit
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntityRabbit) {
          }
                event.setCanceled(true);
     }

     //Ocelot
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntityOcelot) {
          }
                event.setCanceled(true);
     }

     //Enderman
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntityEnderman) {
          }
                event.setCanceled(true);
     }

     //IronGolem
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntityIronGolem) {
          }
                event.setCanceled(true);
     }

     //Evoker
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntityEvoker) {
          }
                event.setCanceled(true);
     }

     //Skeleton
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntitySkeleton) {
          }
                event.setCanceled(true);
     }

     //Golem
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntityGolem) {
          }
                event.setCanceled(true);
     }

     //Husk
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntityHusk) {
          }
                event.setCanceled(true);
     }

     //Shulker
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntityShulker) {
          }
                event.setCanceled(true);
     }

     //Zombie
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntityZombie) {
          }
                event.setCanceled(true);
     }

     //Spider
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntitySpider) {
          }
                event.setCanceled(true);
     }

     //Silverfish
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntitySilverfish) {
          }
                event.setCanceled(true);
     }

     //IllusionIllager
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntityIllusionIllager) {
          }
                event.setCanceled(true);
     }

     //PigZombie
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntityPigZombie) {
          }
                event.setCanceled(true);
     }

     //WitherSkeleton
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntityWitherSkeleton) {
          }
                event.setCanceled(true);
     }

     //Ghast
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntityGhast) {
          }
                event.setCanceled(true);
     }

     //Vindicator
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntityVindicator) {
          }
                event.setCanceled(true);
     }

     //ZombieVillager
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntityZombieVillager) {
          }
                event.setCanceled(true);
     }

     //Snowman
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntitySnowman) {
          }
                event.setCanceled(true);
     }

     //Witch
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntityWitch) {
          }
                event.setCanceled(true);
     }

     //MagmaCube
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntityMagmaCube) {
          }
                event.setCanceled(true);
     }

     //SpellcasterIllager
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntitySpellcasterIllager) {
          }
                event.setCanceled(true);
     }

     //PolarBear
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntityPolarBear) {
          }
                event.setCanceled(true);
     }

     //Guardian
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntityGuardian) {
          }
                event.setCanceled(true);
     }

     //Vex
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntityVex) {
          }
                event.setCanceled(true);
     }

     //Slime
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntitySlime) {
          }
                event.setCanceled(true);
     }

     //Blaze
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntityBlaze) {
          }
                event.setCanceled(true);
     }

     //Creeper
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntityCreeper) {
          }
                event.setCanceled(true);
     }

     //ElderGuardian
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntityElderGuardian) {
          }
                event.setCanceled(true);
     }

     //CaveSpider
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntityCaveSpider) {
          }
                event.setCanceled(true);
     }

     //Endermite
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntityEndermite) {
          }
                event.setCanceled(true);
     }

     //Stray
     @SubscribeEvent
     public void onEntityJoin(EntityJoinWorldEvent event) {
          if (event.getEntity() instanceof EntityStray) {
          }
               event.setCanceled(true);
     }

//Removes items from Creative Tabs// 
     @EventHandler
     public void hideFromCreative(FMLPostInitializationEvent event) {
          
/*/Swords/*/ {
          Item.IRON_SWORD.setCreativeTab(null); 
          Item.WOODEN_SWORD.setCreativeTab(null); 
          Item.STONE_SWORD.setCreativeTab(null); 
          Item.DIAMOND_SWORD.setCreativeTab(null); 
          Item.GOLDEN_SWORD.setCreativeTab(null); 
          }
/*/Axes/*/ {
          Item.IRON_AXE.setCreativeTab(null); 
          Item.WOODEN_AXE.setCreativeTab(null); 
          Item.STONE_AXE.setCreativeTab(null); 
          Item.DIAMOND_AXE.setCreativeTab(null); 
          Item.GOLDEN_AXE.setCreativeTab(null); 
          }
/*/Pickaxes/*/ {
          Item.IRON_PICKAXE.setCreativeTab(null); 
          Item.WOODEN_PICKAXE.setCreativeTab(null); 
          Item.STONE_PICKAXE.setCreativeTab(null); 
          Item.DIAMOND_PICKAXE.setCreativeTab(null); 
          Item.GOLDEN_PICKAXE.setCreativeTab(null); 
          }
/*/Hoes/*/ {
          Item.IRON_HOE.setCreativeTab(null); 
          Item.WOODEN_HOE.setCreativeTab(null); 
          Item.STONE_HOE.setCreativeTab(null); 
          Item.DIAMOND_HOE.setCreativeTab(null); 
          Item.GOLDEN_HOE.setCreativeTab(null); 
          }
/*/Shovels/*/ {
          Item.IRON_SHOVEL.setCreativeTab(null); 
          Item.WOODEN_SHOVEL.setCreativeTab(null); 
          Item.STONE_SHOVEL.setCreativeTab(null); 
          Item.DIAMOND_SHOVEL.setCreativeTab(null); 
          Item.GOLDEN_SHOVEL.setCreativeTab(null); 
          }

/*/Ores and Stuff/*/ {
          Item.IRON_INGOT.setCreativeTab(null); 
          Item.GOLD_INGOT.setCreativeTab(null); 
          Item.EMERALD.setCreativeTab(null); 
          Item.DIAMOND.setCreativeTab(null); 
          Item.COAL.setCreativeTab(null); 
          Item.QUARTZ.setCreativeTab(null); 
          
          }

/*/Items/*/ {
          Item.GOLDEN_RAIL.setCreativeTab(null); 
          Item.DETECTOR_RAIL.setCreativeTab(null); 
          Item.RAIL.setCreativeTab(null); 
          Item.TORCH.setCreativeTab(null); 
          Item.CAKE.setCreativeTab(null); 
          Block.CAKE.setCreativeTab(null); 
          Item.ACTIVATOR_RAIL.setCreativeTab(null); 
          Item.LEVER.setCreativeTab(null); 
          Item.STONE_PRESSURE_PLATE.setCreativeTab(null); 
          Item.WOODEN_PRESSURE_PLATE.setCreativeTab(null); 
          Item.REDSTONE_TORCH.setCreativeTab(null); 
          Item.STONE_BUTTON.setCreativeTab(null); 
          Item.REPEATER.setCreativeTab(null); 
          Item.TRAPDOOR.setCreativeTab(null); 
          Item.IRON_BARS.setCreativeTab(null); 
          Item.GLASS_PANE.setCreativeTab(null); 
          Item.NETHER_WART.setCreativeTab(null); 
          Block.REDSTONE_LAMP.setCreativeTab(null); 
          Item.TRIPWIRE_HOOK.setCreativeTab(null); 
          Item.WOODEN_BUTTON.setCreativeTab(null); 
          Item.LIGHT_WEIGHTED_PRESSURE_PLATE.setCreativeTab(null); 
          Item.HEAVY_WEIGHTED_PRESSURE_PLATE.setCreativeTab(null); 
          Item.COMPARATOR.setCreativeTab(null); 
          Block.DAYLIGHT_DETECTOR.setCreativeTab(null); 
          Item.HOPPER.setCreativeTab(null); 
          Item.STAINED_GLASS_PANE.setCreativeTab(null); 
          Item.IRON_TRAPDOOR.setCreativeTab(null); 
          Item.CARPET.setCreativeTab(null); 
          Item.BANNER.setCreativeTab(null); 
          Item.SPRUCE_DOOR.setCreativeTab(null); 
          Item.BIRCH_DOOR.setCreativeTab(null); 
          Item.JUNGLE_DOOR.setCreativeTab(null); 
          Item.ACACIA_DOOR.setCreativeTab(null); 
          Item.DARK_OAK_DOOR.setCreativeTab(null); 
          Item.WOODEN_DOOR.setCreativeTab(null); 
          Block.END_ROD.setCreativeTab(null); 
          Block.GLASS.setCreativeTab(null); 
          Block.LAPIS_BLOCK.setCreativeTab(null); 
          Block.DISPENSER.setCreativeTab(null); 
          Block.NOTEBLOCK.setCreativeTab(null); 
          Item.BED.setCreativeTab(null); 
          Block.BED.setCreativeTab(null);
          Block.STICKY_PISTON.setCreativeTab(null); 
          Block.PISTON.setCreativeTab(null); 
          Block.WOOL.setCreativeTab(null); 
          Block.GOLD_BLOCK.setCreativeTab(null); 
          Block.IRON_BLOCK.setCreativeTab(null); 
          Block.STONE_SLAB.setCreativeTab(null); 
          Block.DOUBLE_STONE_SLAB.setCreativeTab(null); 
          Block.BRICK_BLOCK.setCreativeTab(null); 
          Block.TNT.setCreativeTab(null); 
          Block.BOOKSHELF.setCreativeTab(null); 
          Block.MOB_SPAWNER.setCreativeTab(null); 
          Block.CHEST.setCreativeTab(null); 
          Block.DIAMOND_BLOCK.setCreativeTab(null); 
          Block.CRAFTING_TABLE.setCreativeTab(null); 
          Block.FURNACE.setCreativeTab(null); 
          Block.STANDING_SIGN.setCreativeTab(null); 
          Item.LADDER.setCreativeTab(null); 
          Block.JUKEBOX.setCreativeTab(null); 
          Item.FENCE.setCreativeTab(null); 
          Block.PUMPKIN.setCreativeTab(null); 
          Block.NETHERRACK.setCreativeTab(null); 
          Block.SOUL_SAND.setCreativeTab(null); 
          Block.GLOWSTONE.setCreativeTab(null); 
          Block.PORTAL.setCreativeTab(null); 
          Block.LIT_PUMPKIN.setCreativeTab(null); 
          Block.STAINED_GLASS.setCreativeTab(null); 
          Block.MONSTER_EGG.setCreativeTab(null); 
          Block.STONEBRICK.setCreativeTab(null); 
          Item.FENCE_GATE.setCreativeTab(null); 
          Block.BRICK_STAIRS.setCreativeTab(null); 
          Block.STONE_BRICK_STAIRS.setCreativeTab(null); 
          Block.NETHER_BRICK.setCreativeTab(null); 
          Block.NETHER_BRICK_STAIRS.setCreativeTab(null); 
          Item.NETHER_BRICK_FENCE.setCreativeTab(null); 
          Block.ENCHANTING_TABLE.setCreativeTab(null); 
          Block.BREWING_STAND.setCreativeTab(null); 
          Block.CAULDRON.setCreativeTab(null); 
          Item.END_PORTAL.setCreativeTab(null); 
          Block.END_PORTAL_FRAME.setCreativeTab(null); 
          Block.END_STONE.setCreativeTab(null); 
          Item.DRAGON_EGG.setCreativeTab(null); 
          Block.REDSTONE_LAMP.setCreativeTab(null); 
          Block.ENDER_CHEST.setCreativeTab(null); 
          Block.EMERALD_BLOCK.setCreativeTab(null); 
          Block.BEACON.setCreativeTab(null); 
          Item.FLOWER_POT.setCreativeTab(null); 
          Item.SKULL.setCreativeTab(null); 
          Block.ANVIL.setCreativeTab(null); 
          Block.TRAPPED_CHEST.setCreativeTab(null); 
          Block.QUARTZ_BLOCK.setCreativeTab(null); 
          Block.QUARTZ_STAIRS.setCreativeTab(null); 
          Block.DROPPER.setCreativeTab(null); 
          Block.STAINED_HARDENED_CLAY.setCreativeTab(null); 
          Block.SLIME.setCreativeTab(null); 
          Block.PRISMARINE.setCreativeTab(null); 
          Block.SEA_LANTERN.setCreativeTab(null); 
          Block.HAY_BLOCK.setCreativeTab(null); 
          Block.HARDENED_CLAY.setCreativeTab(null); 
          Block.COAL_BLOCK.setCreativeTab(null); 
          Item.SPRUCE_FENCE_GATE.setCreativeTab(null); 
          Item.BIRCH_FENCE_GATE.setCreativeTab(null); 
          Item.JUNGLE_FENCE_GATE.setCreativeTab(null); 
          Item.DARK_OAK_FENCE_GATE.setCreativeTab(null); 
          Item.ACACIA_FENCE_GATE.setCreativeTab(null); 
          Item.SPRUCE_FENCE.setCreativeTab(null); 
          Item.BIRCH_FENCE.setCreativeTab(null); 
          Item.JUNGLE_FENCE.setCreativeTab(null); 
          Item.DARK_OAK_FENCE.setCreativeTab(null); 
          Item.ACACIA_FENCE_GATE.setCreativeTab(null); 
          Item.CHORUS_PLANT.setCreativeTab(null); 
          Item.CHORUS_FLOWER.setCreativeTab(null); 
          Block.PURPUR_BLOCK.setCreativeTab(null); 
          Block.PURPUR_PILLAR.setCreativeTab(null); 
          Block.PURPUR_STAIRS.setCreativeTab(null); 
          Block.PURPUR_SLAB.setCreativeTab(null); 
          Block.END_BRICKS.setCreativeTab(null); 
          Block.END_GATEWAY.setCreativeTab(null); 
          Block.OBSERVER.setCreativeTab(null); 
          Block.NETHER_WART_BLOCK.setCreativeTab(null); 
          Block.RED_NETHER_BRICK.setCreativeTab(null); 
          Block.BONE_BLOCK.setCreativeTab(null); 
          Block.WHITE_SHULKER_BOX.setCreativeTab(null); 
          Block.ORANGE_SHULKER_BOX.setCreativeTab(null); 
          Block.MAGENTA_SHULKER_BOX.setCreativeTab(null); 
          Block.LIGHT_BLUE_SHULKER_BOX.setCreativeTab(null); 
          Block.YELLOW_SHULKER_BOX.setCreativeTab(null); 
          Block.LIME_SHULKER_BOX.setCreativeTab(null); 
          Block.PINK_SHULKER_BOX.setCreativeTab(null); 
          Block.GRAY_SHULKER_BOX.setCreativeTab(null); 
          Block.SILVER_SHULKER_BOX.setCreativeTab(null); 
          Block.CYAN_SHULKER_BOX.setCreativeTab(null); 
          Block.PURPLE_SHULKER_BOX.setCreativeTab(null); 
          Block.BLUE_SHULKER_BOX.setCreativeTab(null); 
          Block.BROWN_SHULKER_BOX.setCreativeTab(null); 
          Block.GREEN_SHULKER_BOX.setCreativeTab(null); 
          Block.RED_SHULKER_BOX.setCreativeTab(null); 
          Block.BLACK_SHULKER_BOX.setCreativeTab(null); 
          Block.WHITE_GLAZED_TERRACOTTA.setCreativeTab(null); 
          Block.ORANGE_GLAZED_TERRACOTTA.setCreativeTab(null); 
          Block.MAGENTA_GLAZED_TERRACOTTA.setCreativeTab(null); 
          Block.LIGHT_BLUE_GLAZED_TERRACOTTA.setCreativeTab(null); 
          Block.YELLOW_GLAZED_TERRACOTTA.setCreativeTab(null); 
          Block.LIME_GLAZED_TERRACOTTA.setCreativeTab(null); 
          Block.PINK_GLAZED_TERRACOTTA.setCreativeTab(null); 
          Block.GRAY_GLAZED_TERRACOTTA.setCreativeTab(null); 
          Block.LIGHT_GRAY_GLAZED_TERRACOTTA.setCreativeTab(null); 
          Block.CYAN_GLAZED_TERRACOTTA.setCreativeTab(null); 
          Block.PURPLE_GLAZED_TERRACOTTA.setCreativeTab(null); 
          Block.BLUE_GLAZED_TERRACOTTA.setCreativeTab(null); 
          Block.BROWN_GLAZED_TERRACOTTA.setCreativeTab(null); 
          Block.GREEN_GLAZED_TERRACOTTA.setCreativeTab(null); 
          Block.RED_GLAZED_TERRACOTTA.setCreativeTab(null); 
          Block.BLACK_GLAZED_TERRACOTTA.setCreativeTab(null); 
          Block.CONCRETE.setCreativeTab(null); 
          Block.CONCRETE_POWDER.setCreativeTab(null); 
          Item.FLINT_AND_STEEL.setCreativeTab(null); 
          Item.BOWL.setCreativeTab(null); 
          Item.MUSHROOM_STEW.setCreativeTab(null); 
          Item.GUNPOWDER.setCreativeTab(null); 
          Item.BREAD.setCreativeTab(null); 
          Item.LEATHER_HELMET.setCreativeTab(null); 
          Item.LEATHER_CHESTPLATE.setCreativeTab(null); 
          Item.LEATHER_LEGGINGS.setCreativeTab(null); 
          Item.LEATHER_BOOTS.setCreativeTab(null); 
          Item.IRON_HELMET.setCreativeTab(null); 
          Item.IRON_CHESTPLATE.setCreativeTab(null); 
          Item.IRON_LEGGINGS.setCreativeTab(null); 
          Item.IRON_BOOTS.setCreativeTab(null); 
          Item.GOLD_HELMET.setCreativeTab(null); 
          Item.GOLD_CHESTPLATE.setCreativeTab(null); 
          Item.GOLD_LEGGINGS.setCreativeTab(null); 
          Item.GOLD_BOOTS.setCreativeTab(null); 
          Item.DIAMOND_HELMET.setCreativeTab(null); 
          Item.DIAMOND_CHESTPLATE.setCreativeTab(null); 
          Item.DIAMOND_LEGGINGS.setCreativeTab(null); 
          Item.DIAMOND_BOOTS.setCreativeTab(null); 
          Item.CHAINMAIL_HELMET.setCreativeTab(null); 
          Item.CHAINMAIL_CHESTPLATE.setCreativeTab(null); 
          Item.CHAINMAIL_LEGGINGS.setCreativeTab(null); 
          Item.CHAINMAIL_BOOTS.setCreativeTab(null); 
          Item.FLINT.setCreativeTab(null); 
          Item.RAW_PORKCHOP.setCreativeTab(null); 
          Item.COOKED_PORKCHOP.setCreativeTab(null); 
          Item.PAINTING.setCreativeTab(null); 
          Item.GOLDEN_APPLE.setCreativeTab(null); 
          Item.SIGN.setCreativeTab(null); 
          Item.WOODEN_DOOR.setCreativeTab(null); 
          Item.BUCKET.setCreativeTab(null); 
          Item.WATER_BUCKET.setCreativeTab(null); 
          Item.LAVA_BUCKET.setCreativeTab(null); 
          Item.MINECART.setCreativeTab(null); 
          Item.SADDLE.setCreativeTab(null); 
          Item.IRON_DOOR.setCreativeTab(null); 
          Item.REDSTONE.setCreativeTab(null); 
          Item.BOAT.setCreativeTab(null); 
          Item.LEATHER.setCreativeTab(null); 
          Item.MILK_BUCKET.setCreativeTab(null); 
          Item.BRICK.setCreativeTab(null); 
          Item.CLAY_BALL.setCreativeTab(null); 
          Item.PAPER.setCreativeTab(null); 
          Item.BOOK.setCreativeTab(null); 
          Item.SLIME_BALL.setCreativeTab(null); 
          Item.CHEST_MINECART.setCreativeTab(null); 
          Item.FURNACE_MINECART.setCreativeTab(null); 
          Item.EGG.setCreativeTab(null); 
          Item.COMPASS.setCreativeTab(null); 
          Item.FISHING_ROD.setCreativeTab(null); 
          Item.CLOCK.setCreativeTab(null); 
          Item.GLOWSTONE_DUST.setCreativeTab(null); 
          Item.DYE.setCreativeTab(null); 
          Item.SUGAR.setCreativeTab(null); 
          Item.COOKIE.setCreativeTab(null); 
          Item.MAP.setCreativeTab(null); 
          Item.SHEARS.setCreativeTab(null); 
          Item.PUMPKIN_SEEDS.setCreativeTab(null); 
          Item.BEEF.setCreativeTab(null); 
          Item.COOKED_BEEF.setCreativeTab(null); 
          Item.CHICKEN.setCreativeTab(null); 
          Item.COOKED_CHICKEN.setCreativeTab(null); 
          Item.ROTTEN_FLESH.setCreativeTab(null); 
          Item.ENDER_PEARL.setCreativeTab(null); 
          Item.BLAZE_ROD.setCreativeTab(null); 
          Item.GHAST_TEAR.setCreativeTab(null); 
          Item.GOLD_NUGGET.setCreativeTab(null); 
          Item.POTION.setCreativeTab(null); 
          Item.GLASS_BOTTLE.setCreativeTab(null); 
          Item.SPIDER_EYE.setCreativeTab(null); 
          Item.FERMENTED_SPIDER_EYE.setCreativeTab(null); 
          Item.BLAZE_POWDER.setCreativeTab(null); 
          Item.MAGMA_CREAM.setCreativeTab(null); 
          Item.ENDER_EYE.setCreativeTab(null); 
          Item.SPECKLED_MELON.setCreativeTab(null); 
          Item.SPAWN_EGG.setCreativeTab(null); 
          Item.EXPERIENCE_BOTTLE.setCreativeTab(null); 
          Item.FIRE_CHARGE.setCreativeTab(null); 
          Item.WRITABLE_BOOK.setCreativeTab(null); 
          Item.WRITTEN_BOOK.setCreativeTab(null); 
          Item.ITEM_FRAME.setCreativeTab(null); 
          Item.BAKED_POTATOE.setCreativeTab(null); 
          Item.POISONOUS_POTATOE.setCreativeTab(null); 
          Item.FILLED_MAP.setCreativeTab(null); 
          Item.GOLDEN_CARROT.setCreativeTab(null); 
          Item.CARROT_ON_A_STICK.setCreativeTab(null); 
          Item.NETHER_STAR.setCreativeTab(null); 
          Item.PUMPKIN_PIE.setCreativeTab(null); 
          Item.FIREWORKS.setCreativeTab(null); 
          Item.FIREWORK_CHARGE.setCreativeTab(null); 
          Item.ENCHANTED_BOOK.setCreativeTab(null); 
          Item.NETHERBRICK.setCreativeTab(null); 
          Item.PRISMARINE_SHARD.setCreativeTab(null); 
          Item.TNT_MINECART.setCreativeTab(null); 
          Item.HOPPER_MINECART.setCreativeTab(null); 
          Item.PRISMARINE_CRYSTALS.setCreativeTab(null); 
          Item.RABBIT.setCreativeTab(null); 
          Item.COOKED_RABBIT.setCreativeTab(null); 
          Item.RABBIT_STEW.setCreativeTab(null); 
          Item.RABBIT_FOOT.setCreativeTab(null); 
          Item.RABBIT_HIDE_.setCreativeTab(null); 
          Item.ARMOR_STAND.setCreativeTab(null); 
          Item.IRON_HORSE_ARMOR.setCreativeTab(null); 
          Item.GOLDEN_HORSE_ARMOR.setCreativeTab(null); 
          Item.DIAMOND_HORSE_ARMOR.setCreativeTab(null); 
          Item.NAME_TAG.setCreativeTab(null); 
          Item.COMMAND_BLOCK_MINECART.setCreativeTab(null); 
          Item.MUTTON.setCreativeTab(null); 
          Item.RAW_MUTTON.setCreativeTab(null); 
          Item.POPPED_CHORUS_FRUIT.setCreativeTab(null); 
          Item.BEETROOT.setCreativeTab(null); 
          Item.BEETROOT_SEEDS.setCreativeTab(null); 
          Item.BEETROOT_SUIT.setCreativeTab(null); 
          Item.DRAGON_BREATH.setCreativeTab(null); 
          Item.SPLASH_POTION.setCreativeTab(null); 
          Item.SPECTRAL_ARROW.setCreativeTab(null); 
          Item.TIPPED_ARROW.setCreativeTab(null); 
          Item.LINGERING_POTION.setCreativeTab(null); 
          Item.SHIELD.setCreativeTab(null); 
          Item.ELYTRA.setCreativeTab(null); 
          Item.SPRUCE_BOAT.setCreativeTab(null); 
          Item.BIRCH_BOAT.setCreativeTab(null); 
          Item.JUNGLE_BOAT.setCreativeTab(null); 
          Item.ACACIA_BOAT.setCreativeTab(null); 
          Item.DARK_OAK_BOAT.setCreativeTab(null); 
          Item.TOTEM_OF_UNDYING.setCreativeTab(null); 
          Item.SHULKER_SHELL.setCreativeTab(null); 
          Item.IRON_NUGGET.setCreativeTab(null); 
          Item.KNOWLEDGE_BOOK.setCreativeTab(null); 
          Item.RECORD_13.setCreativeTab(null); 
          Item.RECORD_CAT.setCreativeTab(null); 
          Item.RECORD_BLOCKS.setCreativeTab(null); 
          Item.RECORD_CHIRP.setCreativeTab(null); 
          Item.RECORD_FAR.setCreativeTab(null); 
          Item.RECORD_MALL.setCreativeTab(null); 
          Item.RECORD_MELLOHI.setCreativeTab(null); 
          Item.RECORD_STAL.setCreativeTab(null); 
          Item.RECORD_STRAD.setCreativeTab(null); 
          Item.RECORD_WARD.setCreativeTab(null); 
          Item.RECORD_11.setCreativeTab(null); 
          Item.WAIT.setCreativeTab(null); 
          }

     }

     public void blockStructures(InitMapGenEvent event) {
     // Cancels any structure generation
               event.setCanceled(true);
          }

} 

 

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That code also does not compile. You have multiple methods with the same name and signature. Also what even are those tons of onEntityJoin methods? Why not have just one? And also, why do they all unconditionally cancel the event? This will prevent all entity joins.

 

@EventHandler only works inside your @Mod class. The Item class also does not have those fields (IRON_SWORD, etc.). The Item constants are located in the Items class.

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