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Exception in thread "AWT-EventQueue-0" java.lang.​NullPointe​rException using CreateTable() / Java

SSOI SS 님이 질문을 제출함. 12 Jan 2012
Hi,
Is there anyone here who is using the Yair's CreateTable() function.
I used this function to embed two java tables into my GUI. I didn't use the standard GUI uitable simply because the latter one provides me more flexibitlies.
But if I close my GUI, then I get two red java errors in workspace, in format:
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException at com.mathworks.widgets.spreadsheet.SpreadsheetScrollPane.cleanup(SpreadsheetScrollPane.java:571) at com.mathworks.hg.peer.UitablePeer$3.run(UitablePeer.java:149) at java.awt.event.InvocationEvent.dispatch(Unknown Source) at java.awt.EventQueue.dispatchEvent(Unknown Source) at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.run(Unknown Source)
Does anyone have a idea why this happens and how to solve this ?
By the way, I am not a java experts. How can I find out all the methods within a java (like jTable) object?
Thanks

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Answer by John Libert on 15 Mar 2012

I get this same error, and most of the time MATLAB locks up. It generally happens when MATLAB is open overnight. I have never seen it while I am working. This should be looked at by tech support as I have lost data during big overnight runs.

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Same problem here unfortunately. Any updates on this matter? Is there any response from tech-supps?
many thanks
I also get a similar error, which just starts repeatedly and continuously printing to the matlab command line. This happens only when I leave Matlab open and it's inactive, not processing data for a few hours -- I come back and its spewing
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
repeatedly.

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I too have the same problem can some one support me also

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Answer by Jeffery Devereux on 11 Jan 2018

Same problem here...

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Answer by Jeffery Devereux on 11 Jan 2018

I am going to try adding this to my code to catch the error before it crashes my program. It only happens when I leave it running all night.
%Have some Java javaControl = javaObjectEDT('javax.swing.JFrame'); pause(0.05); drawnow; % this never hurt anyone! fprintf(' \b');

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