7342 – Null pointer exception in PropertySheet

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Bug 7342 - Null pointer exception in PropertySheet

Summary: Null pointer exception in PropertySheet

Status:	CLOSED FIXED

Alias:	None

Product:	platform
Classification:	Unclassified
Component:	-- Other -- (show other bugs)
Version:	3.x
Hardware:	PC Windows 3.1/NT

Importance:	P4 minor (vote)
Assignee:	David Strupl

URL:
Keywords:

Depends on:
Blocks:

Reported:	2000-08-10 15:19 UTC by Martin Ryzl
Modified:	2008-12-23 10:57 UTC (History)
CC List:	0 users

See Also:
Issue Type:	DEFECT
Exception Reporter:

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Description Martin Ryzl 2000-08-10 15:19:03 UTC

[Build 1069] Following exception suddenly started appearing (aproximately every
20 seconds). I don't know why. As yet, I'm not able to reproduce it.

Thu Aug 10 16:13:32 GMT+02:00 2000java.lang.NullPointerException: null
java.lang.NullPointerException
        at java.awt.Container.addImpl(Container.java:345)
        at java.awt.Container.add(Container.java:238)
        at
org.openide.explorer.propertysheet.PropertyDisplayer.setValue(PropertyDisplayer.
java:232)
        at
org.openide.explorer.propertysheet.PropertyDisplayer.<init>(PropertyDisplayer.ja
va:174)
        at
org.openide.explorer.propertysheet.PropertySheet.refreshTab(PropertySheet.java:7
95)
        at
org.openide.explorer.propertysheet.PropertySheet.setCurrentPage(PropertySheet.ja
va:499)
        at
org.openide.explorer.propertysheet.PropertySheet.setCurrentPage(PropertySheet.ja
va:513)
        at
org.openide.explorer.propertysheet.PropertySheet.refreshPropertySheet(PropertySh
eet.java:660)
        at
org.openide.explorer.propertysheet.PropertySheet.access$15(PropertySheet.java:60
5)
        at
org.openide.explorer.propertysheet.PropertySheet$14.run(PropertySheet.java:1212)
        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:154)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:317)
        at
java.awt.EventDispatchThread.pumpOneEvent(EventDispatchThread.java:103)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:84)

Comment 1 Martin Ryzl 2000-08-10 15:23:59 UTC

I've forgot mention additional dialog (Exception) with text:
Exception in org.openide.explorer.propertysheet.editors.ModifierEditor
PropertyEditor

Comment 2 David Strupl 2000-08-18 10:39:59 UTC

Without stack trace from the second exception I cannot do anything since
I am not able to reproduce it. The null pointer is probably caused by the fact
that method getReaderComponent() returned null but it can return null only
after signaling the exception. So the exception stack trace is necessary.

Comment 3 Martin Ryzl 2000-08-28 08:33:59 UTC

I have added everything from the log file.

*********** Exception occurred ************
Thu Aug 10 16:11:17 GMT+02:00 2000java.lang.NullPointerException: null
java.lang.NullPointerException
	at java.awt.Container.addImpl(Container.java:345)
	at java.awt.Container.add(Container.java:238)
	at
org.openide.explorer.propertysheet.PropertyDisplayer.setValue(PropertyDisplayer.
java:232)
	at
org.openide.explorer.propertysheet.PropertySheet.updateTab(PropertySheet.java:86
2)
	at
org.openide.explorer.propertysheet.PropertySheet$13.run(PropertySheet.java:1037)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:154)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:317)
	at
java.awt.EventDispatchThread.pumpOneEvent(EventDispatchThread.java:103)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:84)
*********** Exception occurred ************
Thu Aug 10 16:11:32 GMT+02:00 2000java.lang.NullPointerException: null
java.lang.NullPointerException
	at java.awt.Container.addImpl(Container.java:345)
	at java.awt.Container.add(Container.java:238)
	at
org.openide.explorer.propertysheet.PropertyDisplayer.setValue(PropertyDisplayer.
java:232)
	at
org.openide.explorer.propertysheet.PropertyDisplayer.<init>(PropertyDisplayer.ja
va:174)
	at
org.openide.explorer.propertysheet.PropertySheet.refreshTab(PropertySheet.java:7
95)
	at
org.openide.explorer.propertysheet.PropertySheet.setCurrentPage(PropertySheet.ja
va:499)
	at
org.openide.explorer.propertysheet.PropertySheet.setCurrentPage(PropertySheet.ja
va:513)
	at
org.openide.explorer.propertysheet.PropertySheet.refreshPropertySheet(PropertySh
eet.java:660)
	at
org.openide.explorer.propertysheet.PropertySheet.access$15(PropertySheet.java:60
5)
	at
org.openide.explorer.propertysheet.PropertySheet$14.run(PropertySheet.java:1212)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:154)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:317)
	at
java.awt.EventDispatchThread.pumpOneEvent(EventDispatchThread.java:103)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:84)
*********** Exception occurred ************
Thu Aug 10 16:11:39 GMT+02:00 2000java.lang.NullPointerException: null
java.lang.NullPointerException
	at java.awt.Container.addImpl(Container.java:345)
	at java.awt.Container.add(Container.java:238)
	at
org.openide.explorer.propertysheet.PropertyDisplayer.setValue(PropertyDisplayer.
java:232)
	at
org.openide.explorer.propertysheet.PropertyDisplayer.<init>(PropertyDisplayer.ja
va:174)
	at
org.openide.explorer.propertysheet.PropertySheet.refreshTab(PropertySheet.java:7
95)
	at
org.openide.explorer.propertysheet.PropertySheet.setCurrentPage(PropertySheet.ja
va:499)
	at
org.openide.explorer.propertysheet.PropertySheet.setCurrentPage(PropertySheet.ja
va:513)
	at
org.openide.explorer.propertysheet.PropertySheet.refreshPropertySheet(PropertySh
eet.java:660)
	at
org.openide.explorer.propertysheet.PropertySheet.access$15(PropertySheet.java:60
5)
	at
org.openide.explorer.propertysheet.PropertySheet$14.run(PropertySheet.java:1212)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:154)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:317)
	at
java.awt.EventDispatchThread.pumpOneEvent(EventDispatchThread.java:103)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:84)
*********** Exception occurred ************
Thu Aug 10 16:11:50 GMT+02:00 2000java.lang.NullPointerException: null
java.lang.NullPointerException
	at java.awt.Container.addImpl(Container.java:345)
	at java.awt.Container.add(Container.java:238)
	at
org.openide.explorer.propertysheet.PropertyDisplayer.setValue(PropertyDisplayer.
java:232)
	at
org.openide.explorer.propertysheet.PropertyDisplayer.<init>(PropertyDisplayer.ja
va:174)
	at
org.openide.explorer.propertysheet.PropertySheet.refreshTab(PropertySheet.java:7
95)
	at
org.openide.explorer.propertysheet.PropertySheet.setCurrentPage(PropertySheet.ja
va:499)
	at
org.openide.explorer.propertysheet.PropertySheet.setCurrentPage(PropertySheet.ja
va:513)
	at
org.openide.explorer.propertysheet.PropertySheet.refreshPropertySheet(PropertySh
eet.java:660)
	at
org.openide.explorer.propertysheet.PropertySheet.access$15(PropertySheet.java:60
5)
	at
org.openide.explorer.propertysheet.PropertySheet$14.run(PropertySheet.java:1212)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:154)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:317)
	at
java.awt.EventDispatchThread.pumpOneEvent(EventDispatchThread.java:103)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:84)
*********** Exception occurred ************
Thu Aug 10 16:11:59 GMT+02:00 2000java.lang.NullPointerException: null
java.lang.NullPointerException
	at java.awt.Container.addImpl(Container.java:345)
	at java.awt.Container.add(Container.java:238)
	at
org.openide.explorer.propertysheet.PropertyDisplayer.setValue(PropertyDisplayer.
java:232)
	at
org.openide.explorer.propertysheet.PropertyDisplayer.<init>(PropertyDisplayer.ja
va:174)
	at
org.openide.explorer.propertysheet.PropertySheet.refreshTab(PropertySheet.java:7
95)
	at
org.openide.explorer.propertysheet.PropertySheet.setCurrentPage(PropertySheet.ja
va:499)
	at
org.openide.explorer.propertysheet.PropertySheet.setCurrentPage(PropertySheet.ja
va:513)
	at
org.openide.explorer.propertysheet.PropertySheet.refreshPropertySheet(PropertySh
eet.java:660)
	at
org.openide.explorer.propertysheet.PropertySheet.access$15(PropertySheet.java:60
5)
	at
org.openide.explorer.propertysheet.PropertySheet$14.run(PropertySheet.java:1212)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:154)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:317)
	at
java.awt.EventDispatchThread.pumpOneEvent(EventDispatchThread.java:103)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
	at java.awt.Dialog.show(Dialog.java:370)
	at org.netbeans.core.NbPresenter.show(NbPresenter.java:449)
	at java.awt.Component.show(Component.java:946)
	at java.awt.Component.setVisible(Component.java:903)
	at org.netbeans.core.NbTopManager.notify(NbTopManager.java:391)
	at
org.openide.text.CloneableEditorSupport.canClose(CloneableEditorSupport.java:493
)
	at org.openide.text.CloneableEditor.closeLast(CloneableEditor.java:271)
	at
org.netbeans.modules.java.JavaEditor$JavaEditorComponent.closeLast(JavaEditor.ja
va:858)
	at
org.openide.windows.CloneableTopComponent$Ref.unregister(CloneableTopComponent.j
ava:276)
	at
org.openide.windows.CloneableTopComponent.canClose(CloneableTopComponent.java:14
3)
	at org.openide.text.CloneableEditor.canClose(CloneableEditor.java:145)
	at org.openide.windows.TopComponent.close(TopComponent.java:241)
	at org.openide.windows.TopComponent.close(TopComponent.java:216)
	at
org.netbeans.core.windows.ModeImpl.containerClosing(ModeImpl.java:565)
	at
org.netbeans.core.windows.MultiTabListenerImpl.windowClosing(MultiTabListenerImp
l.java:56)
	at
java.awt.AWTEventMulticaster.windowClosing(AWTEventMulticaster.java:291)
	at java.awt.Window.processWindowEvent(Window.java:798)
	at javax.swing.JFrame.processWindowEvent(JFrame.java:241)
	at java.awt.Window.processEvent(Window.java:774)
	at java.awt.Component.dispatchEventImpl(Component.java:2595)
	at java.awt.Container.dispatchEventImpl(Container.java:1213)
	at java.awt.Window.dispatchEventImpl(Window.java:912)
	at java.awt.Component.dispatchEvent(Component.java:2499)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:319)
	at
java.awt.EventDispatchThread.pumpOneEvent(EventDispatchThread.java:103)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:84)
*********** Exception occurred ************
Thu Aug 10 16:12:33 GMT+02:00 2000java.lang.NullPointerException: null
java.lang.NullPointerException
	at java.awt.Container.addImpl(Container.java:345)
	at java.awt.Container.add(Container.java:238)
	at
org.openide.explorer.propertysheet.PropertyDisplayer.setValue(PropertyDisplayer.
java:232)
	at
org.openide.explorer.propertysheet.PropertyDisplayer.<init>(PropertyDisplayer.ja
va:174)
	at
org.openide.explorer.propertysheet.PropertySheet.refreshTab(PropertySheet.java:7
95)
	at
org.openide.explorer.propertysheet.PropertySheet.setCurrentPage(PropertySheet.ja
va:499)
	at
org.openide.explorer.propertysheet.PropertySheet.setCurrentPage(PropertySheet.ja
va:513)
	at
org.openide.explorer.propertysheet.PropertySheet.refreshPropertySheet(PropertySh
eet.java:660)
	at
org.openide.explorer.propertysheet.PropertySheet.access$15(PropertySheet.java:60
5)
	at
org.openide.explorer.propertysheet.PropertySheet$14.run(PropertySheet.java:1212)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:154)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:317)
	at
java.awt.EventDispatchThread.pumpOneEvent(EventDispatchThread.java:103)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:84)
*********** Exception occurred ************
Thu Aug 10 16:13:32 GMT+02:00 2000java.lang.NullPointerException: null
java.lang.NullPointerException
	at java.awt.Container.addImpl(Container.java:345)
	at java.awt.Container.add(Container.java:238)
	at
org.openide.explorer.propertysheet.PropertyDisplayer.setValue(PropertyDisplayer.
java:232)
	at
org.openide.explorer.propertysheet.PropertyDisplayer.<init>(PropertyDisplayer.ja
va:174)
	at
org.openide.explorer.propertysheet.PropertySheet.refreshTab(PropertySheet.java:7
95)
	at
org.openide.explorer.propertysheet.PropertySheet.setCurrentPage(PropertySheet.ja
va:499)
	at
org.openide.explorer.propertysheet.PropertySheet.setCurrentPage(PropertySheet.ja
va:513)
	at
org.openide.explorer.propertysheet.PropertySheet.refreshPropertySheet(PropertySh
eet.java:660)
	at
org.openide.explorer.propertysheet.PropertySheet.access$15(PropertySheet.java:60
5)
	at
org.openide.explorer.propertysheet.PropertySheet$14.run(PropertySheet.java:1212)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:154)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:317)
	at
java.awt.EventDispatchThread.pumpOneEvent(EventDispatchThread.java:103)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:84)
*********** Exception occurred ************
Thu Aug 10 16:20:27 GMT+02:00 2000java.lang.NullPointerException: null
java.lang.NullPointerException
	at java.awt.Container.addImpl(Container.java:345)
	at java.awt.Container.add(Container.java:238)
	at
org.openide.explorer.propertysheet.PropertyDisplayer.setValue(PropertyDisplayer.
java:232)
	at
org.openide.explorer.propertysheet.PropertyDisplayer.<init>(PropertyDisplayer.ja
va:174)
	at
org.openide.explorer.propertysheet.PropertySheet.refreshTab(PropertySheet.java:7
95)
	at
org.openide.explorer.propertysheet.PropertySheet.setCurrentPage(PropertySheet.ja
va:499)
	at
org.openide.explorer.propertysheet.PropertySheet.setCurrentPage(PropertySheet.ja
va:513)
	at
org.openide.explorer.propertysheet.PropertySheet.refreshPropertySheet(PropertySh
eet.java:660)
	at
org.openide.explorer.propertysheet.PropertySheet.access$15(PropertySheet.java:60
5)
	at
org.openide.explorer.propertysheet.PropertySheet$14.run(PropertySheet.java:1212)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:154)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:317)
	at
java.awt.EventDispatchThread.pumpOneEvent(EventDispatchThread.java:103)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:84)
*********** Exception occurred ************
Thu Aug 10 16:23:33 GMT+02:00 2000java.lang.NullPointerException: null
java.lang.NullPointerException
	at java.awt.Container.addImpl(Container.java:345)
	at java.awt.Container.add(Container.java:238)
	at
org.openide.explorer.propertysheet.PropertyDisplayer.setValue(PropertyDisplayer.
java:232)
	at
org.openide.explorer.propertysheet.PropertyDisplayer.<init>(PropertyDisplayer.ja
va:174)
	at
org.openide.explorer.propertysheet.PropertySheet.refreshTab(PropertySheet.java:7
95)
	at
org.openide.explorer.propertysheet.PropertySheet.setCurrentPage(PropertySheet.ja
va:499)
	at
org.openide.explorer.propertysheet.PropertySheet.setCurrentPage(PropertySheet.ja
va:513)
	at
org.openide.explorer.propertysheet.PropertySheet.refreshPropertySheet(PropertySh
eet.java:660)
	at
org.openide.explorer.propertysheet.PropertySheet.access$15(PropertySheet.java:60
5)
	at
org.openide.explorer.propertysheet.PropertySheet$14.run(PropertySheet.java:1212)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:154)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:317)
	at
java.awt.EventDispatchThread.pumpOneEvent(EventDispatchThread.java:103)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:84)

Comment 4 David Strupl 2000-09-01 10:44:59 UTC

*** Bug 7548 has been marked as a duplicate of this bug. ***

Comment 5 David Strupl 2000-09-01 13:47:59 UTC

I tried to fix it in the main trunk. If you see it again (after build 23)
please reopen.

Comment 6 David Strupl 2000-09-22 10:32:59 UTC

Fixed in boston.

Comment 7 Marian Mirilovic 2002-02-08 15:39:30 UTC

closed