Exception in thread "main" java.awt.HeadlessException:
No X11 DISPLAY variable was set, but this program performed an operation which requires it.
at java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:159)
at java.awt.Window.<init>(Window.java:432)
at java.awt.Frame.<init>(Frame.java:403)
at javax.swing.JFrame.<init>(JFrame.java:202)
at DrawGUI.<init>(DrawGUI.java:15)
at ShapeCreator.<init>(ShapeCreator.java:31)
at ShapeCreator.main(ShapeCreator.java:138)
What does this error message mean? And how can I solve it?
The answer is
Your system does not have a GUI manager. Happens mostly in Solaris/Linux boxes. If you are using GUI in them make sure that you have a GUI manager installed and you may also want to google through the DISPLAY variable.
Problem statement – Getting java.awt.HeadlessException while trying to initialize java.awt.Component from the application as the tomcat environment does not have any head(terminal).
Issue – The linux virtual environment was setup without a virtual display terminal. Tried to install virtual display – Xvfb, but Xvfb has been taken off by the redhat community.
Solution – Installed ‘xorg-x11-drv-vmware.x86_64’ using yum install xorg-x11-drv-vmware.x86_64 and executed startx. Finally set the display to :0.0 using export DISPLAY=:0.0 and then executed xhost +
I think you are trying to run some utility or shell script from UNIX\LINUX which has some GUI. Anyways
SOLUTION: dude all you need is an XServer & X11 forwarding enabled. I use XMing (XServer). You are already enabling X11 forwarding. Just Install it(XMing) and keep it running when you create the session with PuTTY.
This appears to be a more general SWING/AWT/JDK problem that just the JBOSS installer:
The accepted answer below solved the issue for me :
Unable to run java gui programs with ubuntu
("sudo apt-get install openjdk-6-jdk")
I assume you're trying to tunnel into some unix box.
Make sure X11 forwarding is enabled in your PuTTY settings.
Source: Stackoverflow.com