Exception in thread main javalangreflectInvocationTargetException at sunreflectNativeMethodAccessorImplinvoke0Native Method at sunreflectNativeMethodAccessorImplinvokeNativeMethodAccesso

This error occurs when a Java program tries to perform a graphical operation that requires an X11 display, but none is available. This typically happens when running the program on a headless server or in a command-line environment without a graphical interface.

To fix this error, you can either run the program on a machine with a graphical interface, or modify the program to not require a graphical display.