I have created a Minecraft mod in forge 1.12.2, it works just fine in IntelliJ when I run it there, but when I build it I get a noclassdeffound error. From the crash logs, I can see that the issue is in one specific line of code:
registerEntity("Ghost",
EntityGhost.class,
Reference.ENTITY_TEST, 50, 5923, 6096);
more specifically the EntityGhost.class line.
The code for EntityInit, where the error is found
package com.example.examplemod.init;
import com.example.examplemod.ExampleMod;
import com.example.examplemod.Reference;
import com.example.examplemod.entity.ghost.EntityGhost;
import net.minecraft.entity.Entity;
import net.minecraft.util.ResourceLocation;
import net.minecraftforge.fml.common.registry.EntityRegistry;
public class EntityInit {
public static void registerEntities() {
registerEntity("Ghost",
EntityGhost.class,
Reference.ENTITY_TEST, 50, 5923, 6096);
}
private static void registerEntity(
String name,
Class<? extends Entity> entity,
int id,
int range,
int color1,
int color2
) {
EntityRegistry.registerModEntity(
new ResourceLocation(Reference.MOD_ID + ":" + name),
entity,
name,
id,
ExampleMod.instance,
range,
1,
true,
color1,
color2
);
}
private static void registerNonMobEntity() {
}
}
EntityGhost:
package com.example.examplemod.entity.ghost;
import com.example.examplemod.Util.SoundsHandler;
import net.minecraft.entity.EntityCreature;
import net.minecraft.entity.SharedMonsterAttributes;
import net.minecraft.entity.ai.*;
import net.minecraft.entity.monster.EntityMob;
// import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.util.DamageSource;
import net.minecraft.util.ResourceLocation;
import net.minecraft.util.SoundEvent;
import net.minecraft.world.World;
import javax.annotation.Nullable;
public class EntityGhost extends EntityCreature {
public EntityGhost(World worldIn) {
super(worldIn);
this.setSize(width, height);
}
@Override
protected void initEntityAI() {
this.tasks.addTask(2, new EntityAISwimming(this));
this.tasks.addTask(3, new EntityAIWander(this, 0.6));
this.tasks.addTask(2, new EntityAIAvoidEntity<>(this, EntityMob.class, 4.0F, 2.2D, 2.2D));
// this.tasks.addTask(4, new EntityAIWatchClosest(this, EntityPlayer.class, 10.0F));
this.tasks.addTask(2, new EntityAIAttackMelee(this, 1D, false));
}
@Override
protected void applyEntityAttributes() {
super.applyEntityAttributes();
this.getEntityAttribute(SharedMonsterAttributes.MAX_HEALTH).setBaseValue(5.0);
this.getEntityAttribute(SharedMonsterAttributes.MOVEMENT_SPEED).setBaseValue(0.215);
this.getEntityAttribute(SharedMonsterAttributes.FOLLOW_RANGE).setBaseValue(10.0D);
}
@Nullable
@Override
protected SoundEvent getDeathSound() {
return SoundsHandler.Ghost_Death;
}
@Nullable
@Override
protected SoundEvent getAmbientSound() {
return SoundsHandler.Ghost_Ambient;
}
@Nullable
@Override
protected SoundEvent getHurtSound(DamageSource damageSourceIn) {
return SoundsHandler.Ghost_Hurt;
}
@Nullable
@Override
protected ResourceLocation getLootTable() {
return super.getLootTable();
}
}
Here is the complete error log
---- Minecraft Crash Report ----
// There are four lights!
Time: 11/17/22 9:39 AM
Description: There was a severe problem during mod loading that has caused the game to fail
net.minecraftforge.fml.common.LoaderExceptionModCrash: Caught exception from Example Mod (examplemod)
Caused by: java.lang.NoClassDefFoundError: com/example/examplemod/entity/ghost/EntityGhost
at com.example.examplemod.init.EntityInit.registerEntities(EntityInit.java:15)
at com.example.examplemod.Util.RegistryHandler.preInitRegistries(RegistryHandler.java:38)
at com.example.examplemod.ExampleMod.preInit(ExampleMod.java:38)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at net.minecraftforge.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:637)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at com.google.common.eventbus.Subscriber.invokeSubscriberMethod(Subscriber.java:91)
at com.google.common.eventbus.Subscriber$SynchronizedSubscriber.invokeSubscriberMethod(Subscriber.java:150)
at com.google.common.eventbus.Subscriber$1.run(Subscriber.java:76)
at com.google.common.util.concurrent.MoreExecutors$DirectExecutor.execute(MoreExecutors.java:399)
at com.google.common.eventbus.Subscriber.dispatchEvent(Subscriber.java:71)
at com.google.common.eventbus.Dispatcher$PerThreadQueuedDispatcher.dispatch(Dispatcher.java:116)
at com.google.common.eventbus.EventBus.post(EventBus.java:217)
at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:219)
at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:197)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at com.google.common.eventbus.Subscriber.invokeSubscriberMethod(Subscriber.java:91)
at com.google.common.eventbus.Subscriber$SynchronizedSubscriber.invokeSubscriberMethod(Subscriber.java:150)
at com.google.common.eventbus.Subscriber$1.run(Subscriber.java:76)
at com.google.common.util.concurrent.MoreExecutors$DirectExecutor.execute(MoreExecutors.java:399)
at com.google.common.eventbus.Subscriber.dispatchEvent(Subscriber.java:71)
at com.google.common.eventbus.Dispatcher$PerThreadQueuedDispatcher.dispatch(Dispatcher.java:116)
at com.google.common.eventbus.EventBus.post(EventBus.java:217)
at net.minecraftforge.fml.common.LoadController.distributeStateMessage(LoadController.java:136)
at net.minecraftforge.fml.common.Loader.preinitializeMods(Loader.java:629)
at net.minecraftforge.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:252)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:467)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:378)
at net.minecraft.client.main.Main.main(SourceFile:123)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
Caused by: java.lang.ClassNotFoundException: com.example.examplemod.entity.ghost.EntityGhost
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 44 more
Caused by: java.lang.NullPointerException
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:182)
... 46 more
A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------
-- System Details --
Details:
Minecraft Version: 1.12.2
Operating System: Windows 10 (amd64) version 10.0
Java Version: 1.8.0_51, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 551627568 bytes (526 MB) / 872415232 bytes (832 MB) up to 2147483648 bytes (2048 MB)
JVM Flags: 8 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP 9.42 Powered by Forge 14.23.5.2859 5 mods loaded, 5 mods active
States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
| State | ID | Version | Source | Signature |
|:----- |:---------- |:------------ |:----------------------------- |:---------------------------------------- |
| LCH | minecraft | 1.12.2 | minecraft.jar | None |
| LCH | mcp | 9.42 | minecraft.jar | None |
| LCH | FML | 8.0.99.99 | forge-1.12.2-14.23.5.2859.jar | e3c3d50c7c986df74c645c0ac54639741c90a557 |
| LCH | forge | 14.23.5.2859 | forge-1.12.2-14.23.5.2859.jar | e3c3d50c7c986df74c645c0ac54639741c90a557 |
| LCE | examplemod | 1.0 | modid-1.0.jar | None |
Loaded coremods (and transformers):
GL info: ' Vendor: 'Intel' Version: '4.6.0 - Build 30.0.101.1003' Renderer: 'Intel(R) Iris(R) Xe Graphics'
If there is anything else I can provide please let me know, I have absolutely no idea where to go frrom here.
