[1.12.2] Using JavaFX to make JFrames in Mod Not Working?

[PulseBeat_02]

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?

[DavidM]

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 August 28, 2019 by DavidM

[PulseBeat_02]

@DavidM I am having some trouble trying to configure these dependencies in the build.gradle dependencies section. Can you show me a line of script that would add JavaFX to the build path?