applet fileopen dialog npe

Question

I am getting this stack trace in applet code that worked in jre6.0.33+ but fail with this in 7.025. Can anyone help me understand why and correct?

   Exception in thread "AWT-EventQueue-2" java.lang.NullPointerException
    at sun.awt.SunToolkit.getSystemEventQueueImplPP(Unknown Source)
    at sun.awt.SunToolkit.getSystemEventQueueImplPP(Unknown Source)
    at sun.awt.SunToolkit.getSystemEventQueueImpl(Unknown Source)
    at java.awt.Toolkit.getEventQueue(Unknown Source)
    at java.awt.EventQueue.isDispatchThread(Unknown Source)
    at javax.swing.SwingUtilities.isEventDispatchThread(Unknown Source)
    at javax.swing.JComponent.revalidate(Unknown Source)
    at javax.swing.JTable.resizeAndRepaint(Unknown Source)
    at javax.swing.JTable.sortedTableChanged(Unknown Source)
    at javax.swing.JTable.sorterChanged(Unknown Source)
    at javax.swing.RowSorter.fireRowSorterChanged(Unknown Source)
    at javax.swing.RowSorter.fireRowSorterChanged(Unknown Source)
    at javax.swing.DefaultRowSorter.sort(Unknown Source)
    at sun.swing.FilePane$DetailsTableRowSorter.access$1601(Unknown Source)
    at sun.swing.FilePane$DetailsTableRowSorter$1.call(Unknown Source)
    at sun.swing.FilePane$DetailsTableRowSorter$1.call(Unknown Source)
    at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at sun.awt.shell.Win32ShellFolderManager2$ComInvoker$3.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)

For better help sooner, post an [SSCCE](http://sscce.org/). BTW - please *read* the helpful tag pop-ups. If you had, you might have realized this has nothing to do with the [tag:openfiledialog] tag. -1 to remind you to do so in future. — Andrew Thompson, Oct 02 '13 at 15:17
I have this problem too. It is a bug from Sun but will be fixed in JDK8 — AlexGo, Dec 19 '13 at 13:14
Actually, it seems to be a duplicate of [this question](http://stackoverflow.com/questions/17275259/nullpointerexception-in-invokelater-while-running-through-java-webstart) — Sebastien Diot, Apr 28 '14 at 14:28

score 0 · Answer 1 · answered Oct 02 '13 at 15:36

Mea culpa Yes, I should have refrained and read. The problem is with sorting the dialog box. I accept my down merit punishment. I hope I can still post naive though they be. Please note this is not sarcastic, even with that statement just under pressure.

score 0 · Answer 2 · answered Apr 28 '14 at 14:22

I am getting the same, and it is apparently an "incarnation" of this bug, according to this forum post. It seems to be fixed, but only in a JDK8 version. OTOH, it seems there is an "Apple patch" that fixed this in (presumably) JDK 7 (but only for Apple users).

applet fileopen dialog npe

2 Answers2