Pixl

Could someone help me out? Exception in thread "main" java.lang.ExceptionInInitializerError at org.pushingpixels.substance.internal.contrib.jgoodies.looks.common.Sh adowPopupFactory.install(ShadowPopupFactory.java:115) at org.pushingpixels.substance.api.SubstanceLookAndFeel.initialize(Subst anceLookAndFeel.java:1781) at javax.swing.UIManager.setLookAndFeel(UIManager.java:538) at org.pushingpixels.substance.api.SubstanceLookAndFeel.setSkin(Substanc eLookAndFeel.java:2163) at org.pushingpixels.substance.api.SubstanceLookAndFeel.access$000(Subst anceLookAndFeel.java:92) at org.pushingpixels.substance.api.SubstanceLookAndFeel$3.run(SubstanceL ookAndFeel.java:2136) at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:301) at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756) at java.awt.EventQueue.access$500(EventQueue.java:97) at java.awt.EventQueue$3.run(EventQueue.java:709) at java.awt.EventQueue$3.run(EventQueue.java:703) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionP rivilege(ProtectionDomain.java:76) at java.awt.EventQueue.dispatchEvent(EventQueue.java:726) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThre ad.java:201) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread. java:116) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThre ad.java:105) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93) at java.awt.EventDispatchThread.run(EventDispatchThread.java:82) Caused by: java.awt.HeadlessException: No X11 DISPLAY variable was set, but this program performed an operation which r equires it. at sun.awt.HeadlessToolkit.getScreenResolution(HeadlessToolkit.java:226) at org.pushingpixels.lafwidget.utils.LookUtils.isLowResolution(LookUtils .java:435) at org.pushingpixels.lafwidget.utils.LookUtils.<clinit>(LookUtils.java:2 33) ... 20 more root@WelloffUneven-VM:~/Desktop# java -version java version "1.8.0_101" Java(TM) SE Runtime Environment (build 1.8.0_101-b13) Java HotSpot(TM) Server VM (build 25.101-b13, mixed mode) thanks in advance Fixed it: Set permissions to execute - everyone. If anyone runs into the same issue.