小应用程序查看器问题

Question

--------------------Configuration: Mb - j2sdk <Default> - <Default>--------------------
Initializing jdb ...
> run sun.applet.AppletViewer Mb.htm
> 
VM Started: 
Exception occurred: java.lang.ThreadDeath (uncaught)"thread=TimerQueue", javax.swing.TimerQueue.run(), line=246 bci=63TimerQueue[1] 
Process interrupted by user.
Jcreator 的 debug 窗口中显示这样的提示

Answer 1

java.lang.NullPointerException at sun.awt.windows.WWindowPeer.displayChanged(WWindowPeer.java:154) at sun.awt.SunDisplayChanger.notifyListeners(SunDisplayChanger.java:102) at sun.awt.Win32GraphicsDevice.displayChanged(Win32GraphicsDevice.java:333) at sun.awt.Win32GraphicsEnvironment.displayChanged(Win32GraphicsEnvironment.java:90) at sun.awt.windows.WToolkit$4.run(WToolkit.java:717) at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:178) at java.awt.EventQueue.dispatchEvent(EventQueue.java:443) at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:191) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:144) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:130) at java.awt.EventDispatchThread.run(EventDispatchThread.java:98)
控制台里显示上面的信息