MCArTyR

I read what needs to be done like this: private void setup(final FMLCommonSetupEvent event){ DefferedWorkQueue.runLater(() -> { GlobalEntityTypeAttributes.put(...); }); } But due to deprecation warnings, I did this: @SubscribeEvent public static void onEntityAttributeCreation(EntityAttributeCreationEvent event){ event.put(RegistryHandler.FROG_ENTITY.get(), FrogEntity.setCustomAttributes().build()); } My error: java.lang.NullPointerException: Cannot invoke "net.minecraft.entity.ai.attributes.AttributeModifierMap.getValue(net.minecraft.entity.ai.attributes.Attribute)" because "this.supplier" is null at net.minecraft.entity.ai.attributes.AttributeModifierManager.getValue(AttributeModifierManager.java:67) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?] {re:classloading} at net.minecraft.entity.LivingEntity.getAttributeValue(LivingEntity.java:1729) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?] {re:classloading} at net.minecraft.entity.LivingEntity.getMaxHealth(LivingEntity.java:1509) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?] {re:classloading} at net.minecraft.entity.LivingEntity.<init>(LivingEntity.java:207) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?] {re:classloading} at net.minecraft.entity.MobEntity.<init>(MobEntity.java:108) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?] {re:classloading,pl:accesstransformer:B} at net.minecraft.entity.CreatureEntity.<init>(CreatureEntity.java:13) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?] {re:classloading} at net.minecraft.entity.AgeableEntity.<init>(AgeableEntity.java:21) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?] {re:classloading} at net.minecraft.entity.passive.AnimalEntity.<init>(AnimalEntity.java:37) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?] {re:classloading} at me.mcartyr.tutorial.entities.FrogEntity.<init>(FrogEntity.java:31) ~[main/:?] {re:classloading} How to fix it?

Thank you. It works now.

What class is this method from? UPD: Found.

I want to make it so that when the chestplate is on, the player can fly. Here is my code: @SubscribeEvent public static void onEquipmentChange(LivingEquipmentChangeEvent event){ if (!(event.getEntity() instanceof PlayerEntity)) return; PlayerEntity player = (PlayerEntity) event.getEntity(); if(player.isCreative()) return; if(event.getSlot().equals(EquipmentSlotType.CHEST)){ Item item = event.getTo().getItem(); if(event.getFrom().getItem().equals(RegistryHandler.RUBY_CHESTPLATE.get())){ player.abilities.mayfly = false; } if(item != null && item.equals(RegistryHandler.RUBY_CHESTPLATE.get())){ player.abilities.mayfly = true; } } } But the player still cannot fly.