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Hi, I was trying to make a Scene in my mod using JavaFX. After making the JFXPanel, and adding it to the JFrame, I ran it in my mod, however, I crashed almost immediately.

 

Time: 8/27/19 8:35 PM
Description: There was a severe problem during mod loading that has caused the game to fail

net.minecraftforge.fml.common.LoaderExceptionModCrash: Caught exception from King Mammoth (kingmammoth)
Caused by: java.lang.NoClassDefFoundError: pulsebeat_02/kingmammoth/config/window/Trailer
	at pulsebeat_02.kingmammoth.KingMammoth.preInit(KingMammoth.java:42)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at net.minecraftforge.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:639)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	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$PerThreadQueuedDispatcher.dispatch(Dispatcher.java:116)
	at com.google.common.eventbus.EventBus.post(EventBus.java:217)
	at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:219)
	at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:197)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at com.google.common.eventbus.Subscriber.invokeSubscriberMethod(Subscriber.java:91)
	at com.google.common.eventbus.Subscriber$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:627)
	at net.minecraftforge.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:252)
	at net.minecraft.client.Minecraft.init(Minecraft.java:514)
	at net.minecraft.client.Minecraft.run(Minecraft.java:422)
	at net.minecraft.client.main.Main.main(Main.java:118)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
	at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at net.minecraftforge.gradle.GradleStartCommon.launch(GradleStartCommon.java:97)
	at GradleStart.main(GradleStart.java:25)
Caused by: java.lang.ClassNotFoundException: pulsebeat_02.kingmammoth.config.window.Trailer
	at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	... 48 more
Caused by: java.lang.NoClassDefFoundError: javafx/embed/swing/JFXPanel
	at java.lang.ClassLoader.defineClass1(Native Method)
	at java.lang.ClassLoader.defineClass(Unknown Source)
	at java.security.SecureClassLoader.defineClass(Unknown Source)
	at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:182)
	... 50 more
Caused by: java.lang.ClassNotFoundException: javafx.embed.swing.JFXPanel
	at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:101)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	... 54 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_191, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 210370472 bytes (200 MB) / 715128832 bytes (682 MB) up to 3801088000 bytes (3625 MB)
	JVM Flags: 0 total; 
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	FML: MCP 9.42 Powered by Forge 14.23.5.2838 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    | forgeSrc-1.12.2-14.23.5.2838.jar | None      |
	| LCH   | forge       | 14.23.5.2838 | forgeSrc-1.12.2-14.23.5.2838.jar | None      |
	| LCE   | kingmammoth | 1.0.0        | main                             | None      |

	Loaded coremods (and transformers): 
	GL info: ' Vendor: 'NVIDIA Corporation' Version: '4.6.0 NVIDIA 430.39' Renderer: 'GeForce GTX 1060 6GB/PCIe/SSE2'
[20:35:52] [Client thread/INFO] [STDOUT]: [net.minecraft.init.Bootstrap:printToSYSOUT:629]: #@!@# Game crashed! Crash report saved to: #@!@# C:\King Mammoth Mod\KingMammoth\run\.\crash-reports\crash-2019-08-27_20.35.52-client.txt

 

From the crash report, it looks like attempting to initialize the JFrame with a JFXPanel will cause a crash due to Minecraft not finding the libraries, however, this is very misleading because Eclipse can identify these libraries, but Minecraft has a custom class loader I believe just by analyzing the crash report (

net.minecraft.launchwrapper.LaunchClassLoader.findClass

), Minecraft uses that class to load libraries. Is there way for my mod to include external dependencies such as JavaFX, other than Forge and included libraries?

Posted (edited)

You have to include them via gradlew.

Most IDEs have a package manager that can be used to install libraries like JavaFX, and you probably installed JavaFX with Eclipse’ package manager; however, Minecraft will not recognize such libraries added by IDE package managers.

Edited by DavidM

Some tips:

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