JDK-6568560 : Regression testcase java/awt/FullScreen/UninitializedDisplayModeChangeTest fails from 6u2 b01
  • Type: Bug
  • Component: client-libs
  • Sub-Component: 2d
  • Affected Version: 6,6u2
  • Priority: P3
  • Status: Resolved
  • Resolution: Fixed
  • OS: windows_xp,windows_vista
  • CPU: x86
  • Submitted: 2007-06-12
  • Updated: 2008-02-06
  • Resolved: 2007-06-30
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JDK 6 JDK 7
6u4 b01Fixed 7Fixed
Related Reports
Duplicate :  
JDK-6570139 - JDK6: java/awt/FullScreen/UninitializedDisplayModeChangeTest/UninitializedDisplayModeChangeTest.java
Relates :  
JDK-4417798 - Need to track add/remove of monitors on display changes
Description
Regression testcase java/awt/FullScreen/UninitializedDisplayModeChangeTest fails starting from build 6u2 b01, on Windows platform. It throws the following exception:

java.lang.NullPointerException 
       at sun.awt.Win32GraphicsEnvironment.displayChanged(Win32GraphicsEnvironment.java:116)
       at sun.awt.windows.WToolkit$4.run(WToolkit.java:755)
       at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
       at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
       at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
       at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
       at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
       at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
       at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
       at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)
Comments
SUGGESTED FIX http://javaweb.sfbay/jcg/6u3/2D/6568560/
15-06-2007
EVALUATION The regression is caused by the fix for 4417798: Need to track add/remove of monitors on display changes We should have checked if 'screens' is null prior to using it in Win32GraphicsEnvironment.displayChanged(). The same regression is present in the current jdk7 build.
12-06-2007
WORK AROUND Call GraphicsEnvironment.getScreenDevices() prior to changing display modes.
12-06-2007