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Java Cannot Call Invokeandwait From The Event Dispatcher Thread

Will boring a cylinder affect its longevity thereafter? See Doug Lea, Concurrent Programming in Java (2nd edition), sec Is Area of a circle always irrational Why are wavelengths shorter than visible light neglected by new telescopes? This is what explains your second issue: As the exception is telling and also mentioned by you in one of your comment: enderOnEDT is synchronized on something way up in the weblink

share|improve this answer answered Jan 7 '11 at 20:46 lujop 5,73163468 How do I get around this? Why did Borden do that to his wife in The Prestige? Let's look at what MyThread is doing. In my case, it happened when I called invokeAndWait() method in the SwingUtilities class.

To fix this you must change the code that calls the method. Can you post some? –Seth May 24 '10 at 19:36 I added a little code. Nice little Gotcha ;) January 5, 2012 at 4:07 PM Javin @ java final keyword example said... When I press the button the run() method is not called.

Record reading has fundamentally changed in MarvinView 5.2, I doubt you could produce such an error with recent versions. Share to Twitter Share to Facebook Labels: core java , Swing Location: United States 5 comments : Anonymous said... I WAS using a Thread, then I used SwingWorker but both of them lock up my GUI... I have the code shown below.

Please type your message and try again. We should not perform any kind of computational work or read/write operation or any other thing that is not related to GUI rendering task inside EDT aka, inside the Runnable of Is there an action I can invoke to get the old step-into semantics (step into last method), noninteractively? To block the Swing thread someone has to at least call it, but no single line in the code presented does that, so again: sophisticated guessing.

Photographing Sea Turtles hatching on the beach Do magic objects carried by a character keep working when unconscious? Otherwise, to post a GUI rendering task in the EventQueue, use SwingUtilities.invokeLater(Runnable). Why do we need InvokeAndWait method in Swing As we know that Swing is not thread-safe and we can not update the Swing component or GUI from any thread. java multithreading swing concurrency deadlock share|improve this question edited May 25 '10 at 20:51 asked May 24 '10 at 19:30 Paul Reiners 5,0312081135 2 It's going to be difficult to

And in your example it seems that you are in the EDT. Here's a variation on this scenario. The application isn't necessarily performing long-running operations on the EDT. Event Dispatch Thread and EventQueue Swing event handling code runs on a special thread known as the Event Dispatch Thread(EDT).

Powered by Blogger. http://pgexch.com/java-cannot/java-cannot-be-inherited-with-different-arguments.html That is my sole purpose of explaining the Event Queue and EDT mechanism. And "safely" means relinquishing locks before calling it. Suppose that E1's handler needs to lock L.

Edit: As it turns out, the actual problem is this loop: synchronized(performedAction){ while(!hasPerformedAction()){ try { performedAction.wait(); } catch (InterruptedException e) { e.printStackTrace(); } } setPerformedAction(false); } Since there is only one Perhaps this code is too complex to be asking this question here. You can't relinquish one of Java's built-in monitor locks within a synchronized block, so you have to close the block, make your call, and open it again: synchronized (someObject) { // check over here In practice, it's difficult to know when one is violating this precondition, as the OP's problem illustrates.

Hot Network Questions Should I allow my child to make an alternate meal if they do not like anything served at mealtime? Such action can be slow (and in this case, even blocks the event dispatching thread), which will cause UI to be unresponsive. The OP has said that doing so causes other problems.

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It reads from a Bufferred reader. More discussions in JDeveloper and ADF All PlacesJavaJava Development ToolsApplication Development in JavaJDeveloper and ADF This discussion is archived 0 Replies Latest reply on Nov 3, 2005 10:06 AM by 172819 That leaves two candidates for this issue: the one is the clock.latch(), which can cause an issue, but only if it internally does any form of synchronization, for example being declared Specifically: Exception in thread "AWT-EventQueue-2" java.lang.Error: Cannot call invokeAndWait from the event dispatcher thread at java.awt.EventQueue.invokeAndWait(Unknown Source) It is all part of the same conditional.

When one thread is executing a synchronized method for an object, all other threads that invoke synchronized methods for the same object block (suspend execution) until the first thread is done Thanks dude!! September 14, 2011 at 10:02 PM Anonymous said... http://pgexch.com/java-cannot/java-cannot-create-java-virtual-machine-1.html Changing it to SwingUtilities.invokeLater should fix this problem.

Bug145975 - [65cat] Error: Cannot call invokeAndWait from the event dispatcher thread Summary: [65cat] Error: Cannot call invokeAndWait from the event dispatcher thread Status: RESOLVED FIXED Product: contrib Classification: Unclassified Component: As far as I know, multiple S-group multipliers must be integers but you have an "x"  in line 289577 of your molfiles.sdf. This is necessary because most Swing object methods are not thread safe. Another thing to check.

asked 6 years ago viewed 3230 times active 2 years ago Upcoming Events 2016 Community Moderator Election ends Nov 22 Linked 2 Getting return values from SwingUtilities.InvokeLater calls? 1 Two threads In Revelation 19:16, of which kings is Jesus king? How do you dispatch to your own thread and then wait for yourself? Browse other questions tagged java swing event-handling or ask your own question.

there was also lots of followup in terms of blocking and how invokeAndWait achieves blocking etc. So AWT-EventQueue-0 blocks My-Thread (I believe). There is no other thread to change the value. US Election results 2016: What went wrong with prediction models?

Why were pre-election polls and forecast models so wrong about Donald Trump? I assume that commit is true, as otherwise the code would hang on the executor creation, which is sufficiently complex for the JVM to not optimize that out of the stacktrace. Code Review Checklist and Best practices in Java How to convert String to Date in Java - SimpleDate... Call your code directly without the invokeAndWait and runnable. –lujop Jan 7 '11 at 21:03 add a comment| 1 Answer 1 active oldest votes up vote 3 down vote accepted You

asked 5 years ago viewed 2888 times active 5 years ago Upcoming Events 2016 Community Moderator Election ends Nov 22 Related 3What should I do on exceptions thrown by SwingUtilities.invokeAndWait0DefaultStyledDocument.styleChanged(Style style) There's no point in sending a Runnable object from the GUI-thread to itself. There is also a good discussion of this technique in Goetz et. even after now Swing is part of JDK they have remaining in SwingUtilities also.

Have you put some System.out.println()s in? –jzd Jan 7 '11 at 20:37 I am sure.