I am currently trying to install Forge onto my computer. I run 64-bit Fedora 29.
I downloaded the forge installer .jar file, and tried to run it from terminal using the java -jar jarfile command. I've done this before, and it worked - however I've reinstalled the OS since then and I've had trouble running jar files for some reason.
When I execute the command, the system creates a .jar.log file and this is the output:
java.net.preferIPv4Stack=true
Exception in thread "main"
java.awt.HeadlessException
at java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:204)
at java.awt.Window.<init>(Window.java:536)
at java.awt.Frame.<init>(Frame.java:420)
at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:411)
at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:162)
at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:135)
I checked the properties of the jarfile and the permission to allow it to execute as a program is checked, and it still won't run the installer.
Does anybody know how to fix this?
EDIT: Apparently this is an issue with Linux using two versions of java. Ran the command $ sudo dnf install java-1.8.0-openjdk, seems to work fine now.
