This is now replaced in the latest version, under Advanced Settings. Not available under the registry anymore.

fun mods

You have to set the java path in your start script

i tried that and i got rid of java to install the new one but it still says i have the old one and i cant get the new one because of the old one  

I created a boss for Minecraft and when is it called «An unexpected error occurred while trying to run this command» "net.minecraft.world.entity.ai.attributes.attribute instance.m_22100_ (double)" because the return value "net.minecraft.world.entity.monster.zombie.m_21051_(net.minecraft.world.entity.ai.attributes.attribute)" is null. I don't fully understand what the error is. But it seems to be related to attributes. Please help me figure it out   Here is the boss class itself: package org.mymod.afraid; import net.minecraft.world.entity.EntityType; import net.minecraft.world.entity.EquipmentSlot; import net.minecraft.world.entity.ai.attributes.AttributeSupplier; import net.minecraft.world.entity.ai.attributes.Attributes; import net.minecraft.world.entity.ai.goal.*; import net.minecraft.world.entity.ai.goal.target.HurtByTargetGoal; import net.minecraft.world.entity.ai.goal.target.NearestAttackableTargetGoal; import net.minecraft.world.entity.monster.Zombie; import net.minecraft.world.entity.player.Player; import net.minecraft.world.item.ItemStack; import net.minecraft.world.item.Items; import net.minecraft.world.level.Level; import net.minecraft.world.damagesource.DamageSource; import net.minecraft.world.phys.Vec3; import net.minecraft.core.BlockPos; import net.minecraft.world.level.block.Blocks; import net.minecraft.world.entity.projectile.SmallFireball; import org.jetbrains.annotations.NotNull; public class AfraidBoss extends Zombie { private static final int MAX_HEALTH = 1000; private static final double ATTACK_DAMAGE = 10.0D; private static final double FOLLOW_RANGE = 50.0D; private static final double ATTACK_KNOCKBACK = 1.0D; private static final double MOVEMENT_SPEED = 0.25D; private static final int TELEPORT_RADIUS = 20; private static final int FIREBALL_COOLDOWN = 100; // 5 seconds (20 ticks per second) private static final int FIREBALL_COUNT = 3; private int fireballCooldown = 0; private int fireDashCooldown = 0; public AfraidBoss(EntityType<? extends Zombie> type, Level level) { super(type, level); this.setHealth(MAX_HEALTH); this.setItemSlot(EquipmentSlot.MAINHAND, new ItemStack(Items.DIAMOND_SWORD)); this.setItemSlot(EquipmentSlot.OFFHAND, new ItemStack(Items.DIAMOND_SWORD)); } @Override protected void registerGoals() { this.goalSelector.addGoal(1, new MeleeAttackGoal(this, 1.0, true)); this.goalSelector.addGoal(2, new MoveTowardsTargetGoal(this, 1.0, (float) TELEPORT_RADIUS)); this.goalSelector.addGoal(3, new LookAtPlayerGoal(this, Player.class, 8.0F)); this.goalSelector.addGoal(4, new WaterAvoidingRandomStrollGoal(this, 1.0)); this.goalSelector.addGoal(5, new HurtByTargetGoal(this)); this.targetSelector.addGoal(1, new NearestAttackableTargetGoal<>(this, Player.class, true)); } @Override public void aiStep() { super.aiStep(); if (this.getTarget() instanceof Player) { Player player = (Player) this.getTarget(); double distanceToPlayer = this.distanceToSqr(player); // Fire Dash ability if (distanceToPlayer <= TELEPORT_RADIUS * TELEPORT_RADIUS && fireDashCooldown == 0) { this.fireDash(player); fireDashCooldown = 200; // Cooldown for fire dash (10 seconds) } // Fireball attack if (fireballCooldown == 0) { this.shootFireballs(player); fireballCooldown = FIREBALL_COOLDOWN; // Cooldown for fireball attack (5 seconds) } // Decrement cooldowns if (fireDashCooldown > 0) { fireDashCooldown--; } if (fireballCooldown > 0) { fireballCooldown--; } } } private void fireDash(Player player) { Vec3 direction = player.position().subtract(this.position()).normalize(); Vec3 newPos = this.position().add(direction.scale(10)); this.teleportTo(newPos.x, newPos.y, newPos.z); this.createFireTrail(newPos); player.hurt(DamageSource.mobAttack(this), 20.0F); // Damage the player } private void createFireTrail(Vec3 position) { for (int x = -2; x <= 2; x++) { for (int z = -2; z <= 2; z++) { BlockPos firePos = new BlockPos(position.x + x, position.y, position.z + z); this.level.setBlock(firePos, Blocks.FIRE.defaultBlockState(), 11); } } } private void shootFireballs(Player player) { Vec3 direction = player.position().subtract(this.position()).normalize(); for (int i = 0; i < FIREBALL_COUNT; i++) { SmallFireball fireball = new SmallFireball(this.level, this, direction.x, direction.y, direction.z); fireball.setPos(this.getX() + direction.x, this.getY() + direction.y, this.getZ() + direction.z); this.level.addFreshEntity(fireball); } } public static AttributeSupplier.Builder createAttributes() { return Zombie.createMobAttributes() .add(Attributes.MAX_HEALTH, MAX_HEALTH) .add(Attributes.ATTACK_DAMAGE, ATTACK_DAMAGE) .add(Attributes.FOLLOW_RANGE, FOLLOW_RANGE) .add(Attributes.ATTACK_KNOCKBACK, ATTACK_KNOCKBACK) .add(Attributes.MOVEMENT_SPEED, MOVEMENT_SPEED); } @Override public boolean hurt(@NotNull DamageSource source, float amount) { boolean flag = super.hurt(source, amount); if (flag && source.getEntity() instanceof Player) { Player player = (Player) source.getEntity(); if (this.random.nextInt(10) == 0) { this.teleportAndAttack(player); } } return flag; } private void teleportAndAttack(Player player) { Vec3 randomPos = player.position().add((this.random.nextDouble() - 0.5) * 4, 0, (this.random.nextDouble() - 0.5) * 4); if (this.randomTeleport(randomPos.x, randomPos.y, randomPos.z, true)) { player.hurt(DamageSource.mobAttack(this), 10.0F); // Damage the player } } }