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[1.14.4] Custom Skeleton not using the custom bow

erce312

By erce312
in Modder Support

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erce312 Tree Puncher

erce312

Posted
Posted

So I have made a custom skeleton and a custom bow item, however when I give it to the custom skeleton he doesn't use it. Here is my class. Any help would be greatly appreciated. 

package com.github.erce312.informatikacraft.entities;

import com.github.erce312.informatikacraft.init.InformatikacraftEntities;
import com.github.erce312.informatikacraft.init.InformatikacraftItems;

import net.minecraft.entity.EntityType;
import net.minecraft.entity.LivingEntity;
import net.minecraft.entity.monster.AbstractSkeletonEntity;
import net.minecraft.entity.monster.SkeletonEntity;
import net.minecraft.entity.projectile.AbstractArrowEntity;
import net.minecraft.entity.projectile.ProjectileHelper;
import net.minecraft.inventory.EquipmentSlotType;
import net.minecraft.item.ItemStack;
import net.minecraft.util.SoundEvent;
import net.minecraft.util.SoundEvents;
import net.minecraft.util.math.MathHelper;
import net.minecraft.world.DifficultyInstance;
import net.minecraft.world.World;

public class Reaper extends AbstractSkeletonEntity
{
  
    public Reaper(EntityType<? extends AbstractSkeletonEntity> type, World wotldIn) 
    {
        super((EntityType<? extends SkeletonEntity>) InformatikacraftEntities.REAPER, wotldIn);
    }
    @Override
     protected void setEquipmentBasedOnDifficulty(DifficultyInstance difficulty) 
    {
         super.setEquipmentBasedOnDifficulty(difficulty);
         this.setItemStackToSlot(EquipmentSlotType.MAINHAND, new ItemStack(InformatikacraftItems.amethyst_bow));

    }
    @Override
    protected SoundEvent getStepSound() {
        return null;
    }
    @Override
    public void attackEntityWithRangedAttack(LivingEntity target, float distanceFactor) {
          ItemStack itemstack = this.findAmmo(this.getHeldItem(ProjectileHelper.getHandWith(this, InformatikacraftItems.amethyst_bow)));
          AbstractArrowEntity abstractarrowentity = this.func_213624_b(itemstack, distanceFactor);
          if (this.getHeldItemMainhand().getItem() instanceof net.minecraft.item.BowItem)
             abstractarrowentity = ((net.minecraft.item.BowItem)this.getHeldItemMainhand().getItem()).customeArrow(abstractarrowentity);
          double d0 = target.posX - this.posX;
          double d1 = target.getBoundingBox().minY + (double)(target.getHeight() / 3.0F) - abstractarrowentity.posY;
          double d2 = target.posZ - this.posZ;
          double d3 = (double)MathHelper.sqrt(d0 * d0 + d2 * d2);
          abstractarrowentity.shoot(d0, d1 + d3 * (double)0.2F, d2, 1.6F, (float)(14 - this.world.getDifficulty().getId() * 4));
          this.playSound(SoundEvents.ENTITY_SKELETON_SHOOT, 1.0F, 1.0F / (this.getRNG().nextFloat() * 0.4F + 0.8F));
          this.world.addEntity(abstractarrowentity);
        super.attackEntityWithRangedAttack(target, distanceFactor);
    }          
}


     

erce312 Tree Puncher

erce312

Posted
  • Author
Posted

I have tried to to that but had a lot of issues with aiArrowAttack and aiAttackOnCollide being set to private in the AbstractSkeletonEntity class. I've tried to rewrite them like this in my code 

        private final RangedBowAttackGoal<AbstractSkeletonEntity> aiArrowAttack = new RangedBowAttackGoal<>(this, 1.0D, 20, 15.0F);
        private final MeleeAttackGoal aiAttackOnCollide = new MeleeAttackGoal(this, 1.2D, false) 
        {

              public void resetTask() {
                 super.resetTask();
                 Reaper.this.setAggroed(false);
              }


              public void startExecuting() {
                 super.startExecuting();
                 Reaper.this.setAggroed(true);
              }
        };

and then override the setAttackGoal  

    @Override
    public void setCombatTask() {
           if (this.world != null && !this.world.isRemote) {
              this.goalSelector.removeGoal(this.aiAttackOnCollide);
              this.goalSelector.removeGoal(this.aiArrowAttack);
              ItemStack itemstack = this.getHeldItem(ProjectileHelper.getHandWith(this, InformatikacraftItems.amethyst_bow));
              if (itemstack.getItem() instanceof net.minecraft.item.BowItem) {
                 int i = 20;
                 if (this.world.getDifficulty() != Difficulty.HARD) {
                    i = 40;
                 }

                 this.aiArrowAttack.setAttackCooldown(i);
                 this.goalSelector.addGoal(4, this.aiArrowAttack);
              } else {
                 this.goalSelector.addGoal(4, this.aiAttackOnCollide);
                 }

              }
           }

But the mob wouldn't spawn now. Here is the crash report 

 [Server thread/FATAL] [minecraft/ThreadTaskExecutor]: Error executing task on Server
java.lang.NullPointerException: null
        at net.minecraft.entity.ai.goal.PrioritizedGoal.hashCode(PrioritizedGoal.java:97) ~[?:?] {re:classloading}
        at java.util.HashMap.hash(HashMap.java:339) ~[?:1.8.0_221] {}
        at java.util.HashMap.put(HashMap.java:612) ~[?:1.8.0_221] {}
        at java.util.HashSet.add(HashSet.java:220) ~[?:1.8.0_221] {}
        at net.minecraft.entity.ai.goal.GoalSelector.addGoal(GoalSelector.java:42) ~[?:?] {re:classloading}
        at com.github.erce312.informatikacraft.entities.Reaper.setCombatTask(Reaper.java:87) ~[?:?] {re:classloading}
        at net.minecraft.entity.monster.AbstractSkeletonEntity.<init>(AbstractSkeletonEntity.java:69) ~[?:?] {re:classloading,pl:accesstransformer:B}
        at com.github.erce312.informatikacraft.entities.Reaper.<init>(Reaper.java:44) ~[?:?] {re:classloading}
        at net.minecraft.entity.EntityType.create(EntityType.java:415) ~[?:?] {re:classloading}
        at net.minecraft.entity.EntityType.create(EntityType.java:305) ~[?:?] {re:classloading}
        at net.minecraft.entity.EntityType.spawn(EntityType.java:297) ~[?:?] {re:classloading}
        at net.minecraft.entity.EntityType.spawn(EntityType.java:292) ~[?:?] {re:classloading}
        at net.minecraft.item.SpawnEggItem.onItemUse(SpawnEggItem.java:80) ~[?:?] {re:classloading}
        at net.minecraftforge.common.ForgeHooks.onPlaceItemIntoWorld(ForgeHooks.java:607) ~[?:?] {re:classloading}
        at net.minecraft.item.ItemStack.onItemUse(ItemStack.java:168) ~[?:?] {re:classloading}
        at net.minecraft.server.management.PlayerInteractionManager.func_219441_a(PlayerInteractionManager.java:341) ~[?:?] {re:classloading}
        at net.minecraft.network.play.ServerPlayNetHandler.processTryUseItemOnBlock(ServerPlayNetHandler.java:870) ~[?:?] {re:classloading}
        at net.minecraft.network.play.client.CPlayerTryUseItemOnBlockPacket.processPacket(CPlayerTryUseItemOnBlockPacket.java:42) ~[?:?] {re:classloading}
        at net.minecraft.network.play.client.CPlayerTryUseItemOnBlockPacket.processPacket(CPlayerTryUseItemOnBlockPacket.java:12) ~[?:?] {re:classloading}
        at net.minecraft.network.PacketThreadUtil.lambda$checkThreadAndEnqueue$0(PacketThreadUtil.java:19) ~[?:?] {re:classloading}
        at net.minecraft.util.concurrent.TickDelayedTask.run(TickDelayedTask.java:20) ~[?:?] {re:classloading}
        at net.minecraft.util.concurrent.ThreadTaskExecutor.run(ThreadTaskExecutor.java:140) [?:?] {re:classloading,pl:accesstransformer:B}
        at net.minecraft.util.concurrent.RecursiveEventLoop.run(RecursiveEventLoop.java:22) [?:?] {re:classloading}
        at net.minecraft.util.concurrent.ThreadTaskExecutor.driveOne(ThreadTaskExecutor.java:110) [?:?] {re:classloading,pl:accesstransformer:B}
        at net.minecraft.server.MinecraftServer.func_213205_aW(MinecraftServer.java:726) [?:?] {re:classloading,pl:accesstransformer:B}
        at net.minecraft.server.MinecraftServer.driveOne(MinecraftServer.java:720) [?:?] {re:classloading,pl:accesstransformer:B}
        at net.minecraft.util.concurrent.ThreadTaskExecutor.drainTasks(ThreadTaskExecutor.java:97) [?:?] {re:classloading,pl:accesstransformer:B}
        at net.minecraft.server.MinecraftServer.runScheduledTasks(MinecraftServer.java:705) [?:?] {re:classloading,pl:accesstransformer:B}
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:650) [?:?] {re:classloading,pl:accesstransformer:B}
        at java.lang.Thread.run(Thread.java:748) [?:1.8.0_221] {}

Here is the full class 

package com.github.erce312.informatikacraft.entities;

import com.github.erce312.informatikacraft.init.InformatikacraftEntities;
import com.github.erce312.informatikacraft.init.InformatikacraftItems;

import net.minecraft.entity.EntityType;
import net.minecraft.entity.LivingEntity;
import net.minecraft.entity.ai.goal.MeleeAttackGoal;
import net.minecraft.entity.ai.goal.RangedBowAttackGoal;
import net.minecraft.entity.monster.AbstractSkeletonEntity;
import net.minecraft.entity.monster.SkeletonEntity;
import net.minecraft.entity.projectile.AbstractArrowEntity;
import net.minecraft.entity.projectile.ProjectileHelper;
import net.minecraft.inventory.EquipmentSlotType;
import net.minecraft.item.ItemStack;
import net.minecraft.item.Items;
import net.minecraft.util.SoundEvent;
import net.minecraft.util.SoundEvents;
import net.minecraft.util.math.MathHelper;
import net.minecraft.world.Difficulty;
import net.minecraft.world.DifficultyInstance;
import net.minecraft.world.World;

public class Reaper extends AbstractSkeletonEntity
{
        private final RangedBowAttackGoal<AbstractSkeletonEntity> aiArrowAttack = new RangedBowAttackGoal<>(this, 1.0D, 20, 15.0F);
        private final MeleeAttackGoal aiAttackOnCollide = new MeleeAttackGoal(this, 1.2D, false) 
        {

              public void resetTask() {
                 super.resetTask();
                 Reaper.this.setAggroed(false);
              }


              public void startExecuting() {
                 super.startExecuting();
                 Reaper.this.setAggroed(true);
              }
        };
         
    public Reaper(EntityType<? extends AbstractSkeletonEntity> type, World wotldIn) 
    {
        super((EntityType<? extends SkeletonEntity>) InformatikacraftEntities.REAPER, wotldIn);
    }
    @Override
     protected void setEquipmentBasedOnDifficulty(DifficultyInstance difficulty) 
    {
         super.setEquipmentBasedOnDifficulty(difficulty);
         this.setItemStackToSlot(EquipmentSlotType.MAINHAND, new ItemStack(InformatikacraftItems.amethyst_bow));

    }
    @Override
    protected SoundEvent getStepSound() {
        return null;
    }
    @Override
    public void attackEntityWithRangedAttack(LivingEntity target, float distanceFactor) {
          ItemStack itemstack = this.findAmmo(this.getHeldItem(ProjectileHelper.getHandWith(this, InformatikacraftItems.amethyst_bow)));
        

 

DragonITA Dragon Slayer

DragonITA

Posted
Posted
On 2/26/2020 at 2:54 PM, erce312 said:

I have tried to to that but had a lot of issues with aiArrowAttack and aiAttackOnCollide being set to private in the AbstractSkeletonEntity class. I've tried to rewrite them like this in my code 


        private final RangedBowAttackGoal<AbstractSkeletonEntity> aiArrowAttack = new RangedBowAttackGoal<>(this, 1.0D, 20, 15.0F);
        private final MeleeAttackGoal aiAttackOnCollide = new MeleeAttackGoal(this, 1.2D, false) 
        {

              public void resetTask() {
                 super.resetTask();
                 Reaper.this.setAggroed(false);
              }


              public void startExecuting() {
                 super.startExecuting();
                 Reaper.this.setAggroed(true);
              }
        };

and then override the setAttackGoal  


    @Override
    public void setCombatTask() {
           if (this.world != null && !this.world.isRemote) {
              this.goalSelector.removeGoal(this.aiAttackOnCollide);
              this.goalSelector.removeGoal(this.aiArrowAttack);
              ItemStack itemstack = this.getHeldItem(ProjectileHelper.getHandWith(this, InformatikacraftItems.amethyst_bow));
              if (itemstack.getItem() instanceof net.minecraft.item.BowItem) {
                 int i = 20;
                 if (this.world.getDifficulty() != Difficulty.HARD) {
                    i = 40;
                 }

                 this.aiArrowAttack.setAttackCooldown(i);
                 this.goalSelector.addGoal(4, this.aiArrowAttack);
              } else {
                 this.goalSelector.addGoal(4, this.aiAttackOnCollide);
                 }

              }
           }

But the mob wouldn't spawn now. Here is the crash report 


 [Server thread/FATAL] [minecraft/ThreadTaskExecutor]: Error executing task on Server
java.lang.NullPointerException: null
        at net.minecraft.entity.ai.goal.PrioritizedGoal.hashCode(PrioritizedGoal.java:97) ~[?:?] {re:classloading}
        at java.util.HashMap.hash(HashMap.java:339) ~[?:1.8.0_221] {}
        at java.util.HashMap.put(HashMap.java:612) ~[?:1.8.0_221] {}
        at java.util.HashSet.add(HashSet.java:220) ~[?:1.8.0_221] {}
        at net.minecraft.entity.ai.goal.GoalSelector.addGoal(GoalSelector.java:42) ~[?:?] {re:classloading}
        at com.github.erce312.informatikacraft.entities.Reaper.setCombatTask(Reaper.java:87) ~[?:?] {re:classloading}
        at net.minecraft.entity.monster.AbstractSkeletonEntity.<init>(AbstractSkeletonEntity.java:69) ~[?:?] {re:classloading,pl:accesstransformer:B}
        at com.github.erce312.informatikacraft.entities.Reaper.<init>(Reaper.java:44) ~[?:?] {re:classloading}
        at net.minecraft.entity.EntityType.create(EntityType.java:415) ~[?:?] {re:classloading}
        at net.minecraft.entity.EntityType.create(EntityType.java:305) ~[?:?] {re:classloading}
        at net.minecraft.entity.EntityType.spawn(EntityType.java:297) ~[?:?] {re:classloading}
        at net.minecraft.entity.EntityType.spawn(EntityType.java:292) ~[?:?] {re:classloading}
        at net.minecraft.item.SpawnEggItem.onItemUse(SpawnEggItem.java:80) ~[?:?] {re:classloading}
        at net.minecraftforge.common.ForgeHooks.onPlaceItemIntoWorld(ForgeHooks.java:607) ~[?:?] {re:classloading}
        at net.minecraft.item.ItemStack.onItemUse(ItemStack.java:168) ~[?:?] {re:classloading}
        at net.minecraft.server.management.PlayerInteractionManager.func_219441_a(PlayerInteractionManager.java:341) ~[?:?] {re:classloading}
        at net.minecraft.network.play.ServerPlayNetHandler.processTryUseItemOnBlock(ServerPlayNetHandler.java:870) ~[?:?] {re:classloading}
        at net.minecraft.network.play.client.CPlayerTryUseItemOnBlockPacket.processPacket(CPlayerTryUseItemOnBlockPacket.java:42) ~[?:?] {re:classloading}
        at net.minecraft.network.play.client.CPlayerTryUseItemOnBlockPacket.processPacket(CPlayerTryUseItemOnBlockPacket.java:12) ~[?:?] {re:classloading}
        at net.minecraft.network.PacketThreadUtil.lambda$checkThreadAndEnqueue$0(PacketThreadUtil.java:19) ~[?:?] {re:classloading}
        at net.minecraft.util.concurrent.TickDelayedTask.run(TickDelayedTask.java:20) ~[?:?] {re:classloading}
        at net.minecraft.util.concurrent.ThreadTaskExecutor.run(ThreadTaskExecutor.java:140) [?:?] {re:classloading,pl:accesstransformer:B}
        at net.minecraft.util.concurrent.RecursiveEventLoop.run(RecursiveEventLoop.java:22) [?:?] {re:classloading}
        at net.minecraft.util.concurrent.ThreadTaskExecutor.driveOne(ThreadTaskExecutor.java:110) [?:?] {re:classloading,pl:accesstransformer:B}
        at net.minecraft.server.MinecraftServer.func_213205_aW(MinecraftServer.java:726) [?:?] {re:classloading,pl:accesstransformer:B}
        at net.minecraft.server.MinecraftServer.driveOne(MinecraftServer.java:720) [?:?] {re:classloading,pl:accesstransformer:B}
        at net.minecraft.util.concurrent.ThreadTaskExecutor.drainTasks(ThreadTaskExecutor.java:97) [?:?] {re:classloading,pl:accesstransformer:B}
        at net.minecraft.server.MinecraftServer.runScheduledTasks(MinecraftServer.java:705) [?:?] {re:classloading,pl:accesstransformer:B}
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:650) [?:?] {re:classloading,pl:accesstransformer:B}
        at java.lang.Thread.run(Thread.java:748) [?:1.8.0_221] {}

Here is the full class 


package com.github.erce312.informatikacraft.entities;

import com.github.erce312.informatikacraft.init.InformatikacraftEntities;
import com.github.erce312.informatikacraft.init.InformatikacraftItems;

import net.minecraft.entity.EntityType;
import net.minecraft.entity.LivingEntity;
import net.minecraft.entity.ai.goal.MeleeAttackGoal;
import net.minecraft.entity.ai.goal.RangedBowAttackGoal;
import net.minecraft.entity.monster.AbstractSkeletonEntity;
import net.minecraft.entity.monster.SkeletonEntity;
import net.minecraft.entity.projectile.AbstractArrowEntity;
import net.minecraft.entity.projectile.ProjectileHelper;
import net.minecraft.inventory.EquipmentSlotType;
import net.minecraft.item.ItemStack;
import net.minecraft.item.Items;
import net.minecraft.util.SoundEvent;
import net.minecraft.util.SoundEvents;
import net.minecraft.util.math.MathHelper;
import net.minecraft.world.Difficulty;
import net.minecraft.world.DifficultyInstance;
import net.minecraft.world.World;

public class Reaper extends AbstractSkeletonEntity
{
        private final RangedBowAttackGoal<AbstractSkeletonEntity> aiArrowAttack = new RangedBowAttackGoal<>(this, 1.0D, 20, 15.0F);
        private final MeleeAttackGoal aiAttackOnCollide = new MeleeAttackGoal(this, 1.2D, false) 
        {

              public void resetTask() {
                 super.resetTask();
                 Reaper.this.setAggroed(false);
              }


              public void startExecuting() {
                 super.startExecuting();
                 Reaper.this.setAggroed(true);
              }
        };
         
    public Reaper(EntityType<? extends AbstractSkeletonEntity> type, World wotldIn) 
    {
        super((EntityType<? extends SkeletonEntity>) InformatikacraftEntities.REAPER, wotldIn);
    }
    @Override
     protected void setEquipmentBasedOnDifficulty(DifficultyInstance difficulty) 
    {
         super.setEquipmentBasedOnDifficulty(difficulty);
         this.setItemStackToSlot(EquipmentSlotType.MAINHAND, new ItemStack(InformatikacraftItems.amethyst_bow));

    }
    @Override
    protected SoundEvent getStepSound() {
        return null;
    }
    @Override
    public void attackEntityWithRangedAttack(LivingEntity target, float distanceFactor) {
          ItemStack itemstack = this.findAmmo(this.getHeldItem(ProjectileHelper.getHandWith(this, InformatikacraftItems.amethyst_bow)));
        

 

The crashlog is incomplete, can you send a link to github with your mod?

  • Like 1

New in Modding? == Still learning!

erce312 Tree Puncher

erce312

Posted
  • Author
Posted
4 hours ago, DragonITA said:

 

I need the crash report pls, else without we can‘t read where is your mistake.

Well my game doesn't really crash, the entity just doesn't spawn and this is the output in the console. Sorry for using the wrong expression. I also realized I never posted the full class so here it is. 

package com.github.erce312.informatikacraft.entities;

import com.github.erce312.informatikacraft.init.InformatikacraftEntities;
import com.github.erce312.informatikacraft.init.InformatikacraftItems;

import net.minecraft.entity.EntityType;
import net.minecraft.entity.LivingEntity;
import net.minecraft.entity.ai.goal.MeleeAttackGoal;
import net.minecraft.entity.ai.goal.RangedBowAttackGoal;
import net.minecraft.entity.monster.AbstractSkeletonEntity;
import net.minecraft.entity.monster.SkeletonEntity;
import net.minecraft.entity.projectile.AbstractArrowEntity;
import net.minecraft.entity.projectile.ProjectileHelper;
import net.minecraft.inventory.EquipmentSlotType;
import net.minecraft.item.ItemStack;
import net.minecraft.item.Items;
import net.minecraft.util.SoundEvent;
import net.minecraft.util.SoundEvents;
import net.minecraft.util.math.MathHelper;
import net.minecraft.world.Difficulty;
import net.minecraft.world.DifficultyInstance;
import net.minecraft.world.World;

public class Reaper extends AbstractSkeletonEntity
{
    private final RangedBowAttackGoal<AbstractSkeletonEntity> aiArrowAttack = new RangedBowAttackGoal<>(this, 1.0D, 20, 15.0F);
    private final MeleeAttackGoal aiAttackOnCollide = new MeleeAttackGoal(this, 1.2D, false) 
    {

          public void resetTask() {
             super.resetTask();
             Reaper.this.setAggroed(false);
          }


          public void startExecuting() {
             super.startExecuting();
             Reaper.this.setAggroed(true);
          }
    };
    public Reaper(EntityType<? extends AbstractSkeletonEntity> type, World wotldIn) 
    {
        super((EntityType<? extends SkeletonEntity>) InformatikacraftEntities.REAPER, wotldIn);
    }
    @Override
     protected void setEquipmentBasedOnDifficulty(DifficultyInstance difficulty) 
    {
         super.setEquipmentBasedOnDifficulty(difficulty);
         this.setItemStackToSlot(EquipmentSlotType.MAINHAND, new ItemStack(InformatikacraftItems.amethyst_bow));

    }
    @Override
    protected SoundEvent getStepSound() {
        return null;
    }
    @Override
    public void setCombatTask() {
           if (this.world != null && !this.world.isRemote) {
              this.goalSelector.removeGoal(this.aiAttackOnCollide);
              this.goalSelector.removeGoal(this.aiArrowAttack);
              ItemStack itemstack = this.getHeldItem(ProjectileHelper.getHandWith(this, InformatikacraftItems.amethyst_bow));
              if (itemstack.getItem() instanceof net.minecraft.item.BowItem) {
                 int i = 20;
                 if (this.world.getDifficulty() != Difficulty.HARD) {
                    i = 40;
                 }

                 this.aiArrowAttack.setAttackCooldown(i);
                 this.goalSelector.addGoal(4, this.aiArrowAttack);
              } else {
                 this.goalSelector.addGoal(4, this.aiAttackOnCollide);
                 }

              }
           }

    @Override
    public void attackEntityWithRangedAttack(LivingEntity target, float distanceFactor) {
          ItemStack itemstack = this.findAmmo(this.getHeldItem(ProjectileHelper.getHandWith(this, InformatikacraftItems.amethyst_bow)));
          AbstractArrowEntity abstractarrowentity = this.func_213624_b(itemstack, distanceFactor);
          if (this.getHeldItemMainhand().getItem() instanceof net.minecraft.item.BowItem)
             abstractarrowentity = ((net.minecraft.item.BowItem)this.getHeldItemMainhand().getItem()).customeArrow(abstractarrowentity);
          double d0 = target.posX - this.posX;
          double d1 = target.getBoundingBox().minY + (double)(target.getHeight() / 3.0F) - abstractarrowentity.posY;
          double d2 = target.posZ - this.posZ;
          double d3 = (double)MathHelper.sqrt(d0 * d0 + d2 * d2);
          abstractarrowentity.shoot(d0, d1 + d3 * (double)0.2F, d2, 1.6F, (float)(14 - this.world.getDifficulty().getId() * 4));
          this.playSound(SoundEvents.ENTITY_SKELETON_SHOOT, 1.0F, 1.0F / (this.getRNG().nextFloat() * 0.4F + 0.8F));
          this.world.addEntity(abstractarrowentity);
        super.attackEntityWithRangedAttack(target, distanceFactor);
    }
    
}

I've also changed the class a bit so here is the log again  

�[m�[1;31m[22:34:39] [Server thread/FATAL] [minecraft/ThreadTaskExecutor]: Error executing task on Server
java.lang.NullPointerException: null
    at net.minecraft.entity.ai.goal.PrioritizedGoal.hashCode(PrioritizedGoal.java:97) ~[?:?] {re:classloading}
    at java.util.HashMap.hash(Unknown Source) ~[?:1.8.0_241] {}
    at java.util.HashMap.put(Unknown Source) ~[?:1.8.0_241] {}
    at java.util.HashSet.add(Unknown Source) ~[?:1.8.0_241] {}
    at net.minecraft.entity.ai.goal.GoalSelector.addGoal(GoalSelector.java:42) ~[?:?] {re:classloading}
    at com.github.erce312.informatikacraft.entities.Reaper.setCombatTask(Reaper.java:71) ~[?:?] {re:classloading}
    at net.minecraft.entity.monster.AbstractSkeletonEntity.<init>(AbstractSkeletonEntity.java:69) ~[?:?] {re:classloading,pl:accesstransformer:B}
    at com.github.erce312.informatikacraft.entities.Reaper.<init>(Reaper.java:43) ~[?:?] {re:classloading}
    at net.minecraft.entity.EntityType.create(EntityType.java:415) ~[?:?] {re:classloading}
    at net.minecraft.entity.EntityType.create(EntityType.java:305) ~[?:?] {re:classloading}
    at net.minecraft.entity.EntityType.spawn(EntityType.java:297) ~[?:?] {re:classloading}
    at net.minecraft.entity.EntityType.spawn(EntityType.java:292) ~[?:?] {re:classloading}
    at net.minecraft.item.SpawnEggItem.onItemUse(SpawnEggItem.java:80) ~[?:?] {re:classloading}
    at net.minecraftforge.common.ForgeHooks.onPlaceItemIntoWorld(ForgeHooks.java:607) ~[?:?] {re:classloading}
    at net.minecraft.item.ItemStack.onItemUse(ItemStack.java:168) ~[?:?] {re:classloading}
    at net.minecraft.server.management.PlayerInteractionManager.func_219441_a(PlayerInteractionManager.java:341) ~[?:?] {re:classloading}
    at net.minecraft.network.play.ServerPlayNetHandler.processTryUseItemOnBlock(ServerPlayNetHandler.java:870) ~[?:?] {re:classloading}
    at net.minecraft.network.play.client.CPlayerTryUseItemOnBlockPacket.processPacket(CPlayerTryUseItemOnBlockPacket.java:42) ~[?:?] {re:classloading}
    at net.minecraft.network.play.client.CPlayerTryUseItemOnBlockPacket.processPacket(CPlayerTryUseItemOnBlockPacket.java:12) ~[?:?] {re:classloading}
    at net.minecraft.network.PacketThreadUtil.lambda$checkThreadAndEnqueue$0(PacketThreadUtil.java:19) ~[?:?] {re:classloading}
    at net.minecraft.util.concurrent.TickDelayedTask.run(TickDelayedTask.java:20) ~[?:?] {re:classloading}
    at net.minecraft.util.concurrent.ThreadTaskExecutor.run(ThreadTaskExecutor.java:140) [?:?] {re:classloading,pl:accesstransformer:B}
    at net.minecraft.util.concurrent.RecursiveEventLoop.run(RecursiveEventLoop.java:22) [?:?] {re:classloading}
    at net.minecraft.util.concurrent.ThreadTaskExecutor.driveOne(ThreadTaskExecutor.java:110) [?:?] {re:classloading,pl:accesstransformer:B}
    at net.minecraft.server.MinecraftServer.func_213205_aW(MinecraftServer.java:726) [?:?] {re:classloading,pl:accesstransformer:B}
    at net.minecraft.server.MinecraftServer.driveOne(MinecraftServer.java:720) [?:?] {re:classloading,pl:accesstransformer:B}
    at net.minecraft.util.concurrent.ThreadTaskExecutor.driveUntil(ThreadTaskExecutor.java:123) [?:?] {re:classloading,pl:accesstransformer:B}
    at net.minecraft.server.MinecraftServer.runScheduledTasks(MinecraftServer.java:706) [?:?] {re:classloading,pl:accesstransformer:B}
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:650) [?:?] {re:classloading,pl:accesstransformer:B}
    at java.lang.Thread.run(Unknown Source) [?:1.8.0_241] {}

 

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