我的问题是X11变量-当我试图启动gdx-setup.jar时，我得到输出：

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 com.badlogic.gdx.setup.GdxSetupUI.<init>(GdxSetupUI.java:101)
    at com.badlogic.gdx.setup.GdxSetup.main(GdxSetup.java:620)

我在我的本地笔记本电脑上运行ubuntu（没有SSH）。
System details
我试过命令：
sudo apt-get update --修复-缺失sudo apt-get update sudo apt-get clean sudo apt-get自动删除sudo dpkg重新配置-a sudo apt安装-f
一点用都没有。
当我从intellij运行AWT时，我可以正常地看到GUI，没有例外。
我在安装libgdx时遵循了以下说明：https://tutorialforlinux.com/2022/11/14/step-by-step-libgdx-ubuntu-22-04-installation-guide/2/
回显$DISPLAY输出：0
已安装：xorg-x11
双击jar导致无响应...我已将jar标记为可执行文件