Why would I get this exception in the page I embedded the jJreeChart's charts? My UI did not crash though.
java.lang.NullPointerException
at sun.awt.Win32GraphicsEnvironment.displayChanged(Win32GraphicsEnvironm
ent.java:90)
at sun.awt.windows.WToolkit$4.run(WToolkit.java:734)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:178)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:454)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchTh
read.java:201)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThre
ad.java:151)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:145)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:137)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:100)