Bytecode-Viewer-2.12 not work on Wayland with Gnome

[TechComet]

Hi,

Bytecode Viewer 2.12 not work on Wayland with Gnome

System OS: Fedora Linux 40 Desktop: Gnome 46

java -jar ./Bytecode-Viewer-2.12.jar output:

$ java -jar ./Bytecode-Viewer-2.12.jar
Bytecode Viewer 2.12 [Fat Jar] - Created by @Konloch
https://bytecodeviewer.com - https://the.bytecode.club
Cannot set security manager! Are you on Java 18+ and have not enabled support for it?
Because of this, you may be susceptible to some exploits!
Either deal with it or allow it using the -Djava.security.manager=allow parameter.
Exception in thread "main" java.awt.HeadlessException: 
No X11 DISPLAY variable was set,
or no headful library support was found,
but this program performed an operation which requires it,

	at java.desktop/java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:166)
	at java.desktop/java.awt.Window.<init>(Window.java:553)
	at java.desktop/java.awt.Frame.<init>(Frame.java:428)
	at java.desktop/java.awt.Frame.<init>(Frame.java:393)
	at java.desktop/javax.swing.JFrame.<init>(JFrame.java:180)
	at the.bytecode.club.bytecodeviewer.gui.components.JFrameConsole.<init>(JFrameConsole.java:48)
	at the.bytecode.club.bytecodeviewer.gui.components.JFrameConsole.<init>(JFrameConsole.java:44)
	at the.bytecode.club.bytecodeviewer.api.ExceptionUI.<init>(ExceptionUI.java:67)
	at the.bytecode.club.bytecodeviewer.BytecodeViewer.handleException(BytecodeViewer.java:652)
	at the.bytecode.club.bytecodeviewer.BytecodeViewer.handleException(BytecodeViewer.java:644)
	at the.bytecode.club.bytecodeviewer.BytecodeViewer.main(BytecodeViewer.java:239)

[Bl3nd]

I have found a forum post that discusses this issue in relation to your OS. You may find this link useful. I hope this solves your issue.

[Konloch]

Hey @TechComet, thanks for the report. I believe to make the CLI work correctly we'll have to separate the GUI from the core. Essentially the CLI will need to preform actions without relying on the GUI. There's no ETA for this yet but I'll work on solving this. Sorry about that issue!

@Bl3nd Thanks for the solution! Hopefully that will work in the mean time.

[ddxv]

I was hitting this issue as well. The link above by @Bl3nd was very useful and led me to the simple fix:

james@fedora:~$ rpm -qa | grep openjdk
java-21-openjdk-headless-21.0.8.0.9-1.fc42.x86_64

james@fedora:~$ sudo dnf install java-21-openjdk

Looks like I had a headless version installed, installing the regular one and bytecode-viewer starts right up.