我正在为我的世界和我试图实现的暴民制作一个mod，根本不会产生。
我已经咨询了一位比我更了解编码知识的朋友，而他并不能真正帮助我
java.lang.reflect.InvocationTargetException: null
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:1.8.0_202]
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[?:1.8.0_202]
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[?:1.8.0_202]
at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[?:1.8.0_202]
at net.minecraftforge.fml.common.registry.EntityEntryBuilder$ConstructorFactory.apply(EntityEntryBuilder.java:307) [EntityEntryBuilder$ConstructorFactory.class:?]
at net.minecraftforge.fml.common.registry.EntityEntryBuilder$ConstructorFactory.apply(EntityEntryBuilder.java:293) [EntityEntryBuilder$ConstructorFactory.class:?]
at net.minecraftforge.fml.common.registry.EntityEntry.newInstance(EntityEntry.java:68) [EntityEntry.class:?]
at net.minecraft.entity.EntityList.createEntityByIDFromName(EntityList.java:244) [EntityList.class:?]
at net.minecraft.item.ItemMonsterPlacer.spawnCreature(ItemMonsterPlacer.java:242) [ItemMonsterPlacer.class:?]
at net.minecraft.item.ItemMonsterPlacer.onItemUse(ItemMonsterPlacer.java:98) [ItemMonsterPlacer.class:?]
at net.minecraftforge.common.ForgeHooks.onPlaceItemIntoWorld(ForgeHooks.java:884) [ForgeHooks.class:?]
at net.minecraft.item.ItemStack.onItemUse(ItemStack.java:200) [ItemStack.class:?]
at net.minecraft.server.management.PlayerInteractionManager.processRightClickBlock(PlayerInteractionManager.java:507) [PlayerInteractionManager.class:?]
at net.minecraft.network.NetHandlerPlayServer.processTryUseItemOnBlock(NetHandlerPlayServer.java:769) [NetHandlerPlayServer.class:?]
at net.minecraft.network.play.client.CPacketPlayerTryUseItemOnBlock.processPacket(CPacketPlayerTryUseItemOnBlock.java:68) [CPacketPlayerTryUseItemOnBlock.class:?]
at net.minecraft.network.play.client.CPacketPlayerTryUseItemOnBlock.processPacket(CPacketPlayerTryUseItemOnBlock.java:13) [CPacketPlayerTryUseItemOnBlock.class:?]
at net.minecraft.network.PacketThreadUtil$1.run(PacketThreadUtil.java:21) [PacketThreadUtil$1.class:?]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_202]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_202]
at net.minecraft.util.Util.runTask(Util.java:53) [Util.class:?]
at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:798) [MinecraftServer.class:?]
at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:743) [MinecraftServer.class:?]
at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:192) [IntegratedServer.class:?]
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:592) [MinecraftServer.class:?]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_202]
Caused by: java.lang.NullPointerException
at com.Zekrom2378.EpicWeaponry.entity.Shaggy.applyEntityAttributes(Shaggy.java:40) ~[Shaggy.class:?]
at net.minecraft.entity.EntityLivingBase.<init>(EntityLivingBase.java:215) ~[EntityLivingBase.class:?]
at net.minecraft.entity.EntityLiving.<init>(EntityLiving.java:101) ~[EntityLiving.class:?]
at net.minecraft.entity.EntityCreature.<init>(EntityCreature.java:22) ~[EntityCreature.class:?]
at net.minecraft.entity.monster.EntityGolem.<init>(EntityGolem.java:14) ~[EntityGolem.class:?]
at net.minecraft.entity.monster.EntityIronGolem.<init>(EntityIronGolem.java:54) ~[EntityIronGolem.class:?]
at com.Zekrom2378.EpicWeaponry.entity.Shaggy.<init>(Shaggy.java:29) ~[Shaggy.class:?]