java.lang.ClassCastException: sun.awt.CGraphicsEnvironment cannot be cast to sun.awt.X11GraphicsEnvironment
   at sun.awt.X11.XToolkit.<clinit>(XToolkit.java:122)
Caused: java.lang.ExceptionInInitializerError
   at java.lang.Class.forName0(Class.java:0)
   at java.lang.Class.forName(Class.java:186)
   at org.netbeans.modules.debugger.jpda.util.AWTGrabHandler.checkXServerExc(AWTGrabHandler.java:316)
   at org.netbeans.modules.debugger.jpda.util.AWTGrabHandler.checkXServer(AWTGrabHandler.java:303)
   at org.netbeans.modules.debugger.jpda.util.AWTGrabHandler.solveGrabbing(AWTGrabHandler.java:151)
   at org.netbeans.modules.debugger.jpda.util.Operator$1.run(Operator.java:487)
   at java.lang.Thread.run(Thread.java:722)