Jan 3, 2009 · AWT is a Java interface to native system GUI code present in your OS. It will not work the same on every system, although it tries. Swing is a more-or-less pure-Java GUI. It …

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.

Now I just get "Exception in thread "main" java.awt.AWTError: Can't connect to X11 window server using 'localhost:1.0' as the value of the DISPLAY variable." on Ubuntu 16.04.

Sep 9, 2011 · AWT, Swing and SWT are UI toolkits but I would certainly not call them "frameworks". Frameworks are based upon a given UI toolkit and provide the glue to build …

Dec 26, 2012 · I heard that when we use awt or swing, while creating a FRAME, an unchecked exception may be thrown which is "Headless exception". I never got this exception. Can …

export JAVA_TOOL_OPTIONS='-Djava.awt.headless=true' After that if the problem still persists, removing all packages that may interfere may be a radical solution.

Aug 8, 2024 · The event dispatch thread is a special thread that is managed by AWT. Basically, it is a thread that runs in an infinite loop, processing events. The …

Note that the JVM contains heuristics that determine the value of java.awt.headless if it's not explicitly set. For example, on Linux if the DISPLAY environment variable is not set, …

Dec 9, 2024 · Try modifying your application to handle AWT errors gracefully. Use GraphicsEnvironment.isHeadless () to determine the state dynamically and disable UI …

AWT is the original cross-platform, native-peer based GUI widget set. It drew a lot of complaints for not being perfectly consistent across platforms. Sun built the Swing widget set to answer …