Instalation error on Linux

[LetsPlaySimi]

I want to install forge Minecraft 1.12.2 on Linux/Ubuntu/Pop_OS And I get the following error:

home@pop-os:~/Downloads$ java -jar forge-1.12.2-14.23.5.2860-installer.jar 
JVM info: Private Build - 19.0.1 - 19.0.1+10-Ubuntu-1ubuntu122.04
java.net.preferIPv4Stack=true
Found java version 19.0.1
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.SwingUtilities$SharedOwnerFrame.<init>(SwingUtilities.java:1919)
	at java.desktop/javax.swing.SwingUtilities.getSharedOwnerFrame(SwingUtilities.java:1995)
	at java.desktop/javax.swing.JOptionPane.getRootFrame(JOptionPane.java:1696)
	at java.desktop/javax.swing.JOptionPane.showOptionDialog(JOptionPane.java:875)
	at java.desktop/javax.swing.JOptionPane.showMessageDialog(JOptionPane.java:677)
	at java.desktop/javax.swing.JOptionPane.showMessageDialog(JOptionPane.java:648)
	at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:177)
	at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:147)

Same thing happens with 1.18.2 (haven't tried any other versions but I think they're broken too)

Hope someone can help me!

[Hipposgrumm]

This is a java problem, not a forge problem. Try other methods of launching jar files and make sure you have a compatible version of java.