Java Swing apps cause Windows 2K to hang

I have an IBM clone machine running a P4 and Windows 2k that hangs whenever I try to exit out of a window in a Java swing app. Whether the window is the main application window or a menu window instantiated by the application to be a child of the main window, does not matter. It hangs regardless. I have tried multithreaded apps and they do not cause my windows machine to hang. Neither do simple swing apps. But any multithreaded swing app causes it to hang. JEdit causes it. Forte causes it. I am running Java 1.4.1. Thanks for any help in this.

Freezes under Java 1.4.1 with Windows
Posted on Dec 14, 2002 - 02:57 PM by slava
Installation This is turning into a FAQ, so I thought I'd post it on the community site. A lot of people have complained that jEdit can hard freeze their windows system after upgrading to Java 1.4.1. If you experience this, the problem is not with jEdit, but with your video driver. Updating the driver to the latest version should solve the problem; downgrading to Java 1.4.0 might also work.
http://community.jedit.org/modules.php?op=modload&name=news&file=article&sid=190&mode=thread&order=0&thold=0

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Hi All!
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at javax.swing.UIManager.getIcon(UIManager.java:562)
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[email protected]
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Java Swing App hangs on socket loop

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The doSocket() function is where the while loop is if anyone can help me with this i'd be very greatful.
* GuiFrame.java
* Created on August 13, 2008, 9:36 PM
import java.net.*;
import java.io.*;
import java.util.logging.Level;
import java.util.logging.Logger;
* @author brian
public class GuiFrame extends javax.swing.JFrame {
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 } else if (convertButton.getText()=="Disconnect") {
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 // Variables declaration - do not modify
 private javax.swing.JButton convertButton;
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}Edited by: briansykes on Aug 13, 2008 9:55 PM
Edited by: briansykes on Aug 13, 2008 9:56 PM

>
..i've run into a bit of a snag with my application, its a simple chat bot right now but will evolve into a chat client soon. >Is this intended as a GUId app? If so, I would stick to using a GUI for input, rather than reading from the command line (which when I run it, is the DOS window that jumps up in the BG - quite counterintuitive). On the other hand, if it is intended as a non-GUId or headless app., it might be better to avoid any use of JComponents at all.
My edits stick to using a GUI.
Other notes:
- String comparison should be done as
s1.equals(s2)..rather than..
s1 == s2- Never [swallow exceptions|http://pscode.org/javafaq.html#stacktrace] in code that does not work.
- Some basic debugging skills are well called for here, to find where the program is getting stuck. When in doubt, print out!
- What made you think that
a) a test of equality on a member against which you had just set the value to the comparator, would logically lead to 'false'?
old = userInput;
if (userInput != old) ..b) A substring from indices '0 thru 0' would provide 1 character?
String proto = userInput.substring(0, 0);
if (proto == ":") ..
>
..if anyone can help me with this i'd be very greatful.>Gratitude is often best expressed through the offering of [Duke Stars|http://wikis.sun.com/display/SunForums/Duke+Stars+Program+Overview].
* GuiFrame.java
* Created on August 13, 2008, 9:36 PM
import java.net.*;
import java.io.*;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.*;
* @author brian
public class GuiFrame extends JFrame {
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JRE 1.4.2_07 crashed Windows XP-SP2, with a graphics device driver operating ATI Radeon 9800 XT (Driver Name: ati2dvag.dll).
Further tech details below this message.
The Sun Java web sites suggested the next java version upgrade to fix the crash problem.
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(Microsoft Article ID : 157730
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Thank you Forum participants!!
Operating System: Windows XP Professional (5.1, Build 2600) Service Pack 2
System Manufacturer: Dell Computer Corporation
System Model: Dimension 8300
BIOS: Phoenix ROM BIOS PLUS Version 1.10 A07
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Sound Blaster PCI causes Windows 98SE to hang at boot

ASUS P5VD-X motherboard, PentiumD805, GB RAM, 250GBHD, Win98 and XP Dual Boot, Ati Radeon 256 8x AGP.
Hi. After installing the standard old Sound blaster PCI card under Win98SE with the drivers disc and rebooting PC, Win 98 just hangs at the boot screen. I can still get into safe mode and have tried uninstalling [url="http://www.computing.net/windows95/wwwboard/forum/6989.html#" target="_new">[color="green">Sound Blaster[/url] PCI from add remove programs but unfortunately still cant get [url="http://www.computing.net/windows95/wwwboard/forum/6989.html#" target="_new">[color="green">win98[/url] to load normally. I have the onboard SoundMAX audio which is still enabled in bios and?its drivers?installed on win98 so i guess i could use that instead of Sound Blaster if i could boot normally into win98. The [url="http://www.computing.net/windows95/wwwboard/forum/6989.html#" target="_new">[color="green">Sound blaster card[/url] is now removed from [url="http://www.computing.net/windows95/wwwboard/forum/6989.html#" target="_new">[color="green">motherboard[/url] but win98 still hangs on boot up.
When i installed the SBPCI drivers disc and before i rebooted win98 before the crash i noticed that it placed windows media player icons on desktop. I have also tried uninstalling media player.
Interestingly i cant even get the bootlog option or command prompt to work at all it just freezes even though safe mode and safe mode command prompt only work.
I have tried restoring the registry with scanreg/restore to a week ago when there were no boot up problems. This however has still not resolved the boot up hang as soon as windows 98 logo appears.
Can anyone help?

A bunch of things are probably conflicting. The Creative cd seems to have installed WMP7 (later cd's might do that.)? Or possibly a version of WMP6. Your SoundMAX driver is conflicting with the Creative driver. 98 doesn't play well with 2 soundcards. You should have uninstalled the SoundMAX, deactivated it in the BIOS, then installed the Creative card and drivers. 98 can be trashed easily by this kind of thing. I would format (have all your drivers and program setup files saved to a cdr and remove all hardware except for keyboard, mouse and videocard) and install Windows. Install?all the optional Windows components you want from Add/Remove Windows Components tab and the Plus 98!?software if you have it. Then use the packages such as the Unofficial 98SE Service Pack and the Autopatcher Alpha .6 for Windows 98SE on msfn.org Windows 98SE Service Pack forum to update your system. That Autopatcher contains just about all the updates and the Service Pack (installed first) contains?some nice registry tweaks, 256 color tray icons, Windows 2000 color scheme,?nicer desktop icons, a cleaner Dialup Networking .4 install than Microsoft gives you, etc. Then install your hardware and drivers. Have your on board audio disabled in the BIOS from the start if you want to install a Creative card instead.

Performance issue Java Swing under Windows 7

Hello,
we have MDI Java Swing application running under Window7. We got a big problem with performance in MDI Windows using AERO.
Exist any way for Java to tell Win7 that it should not use Aero??
Thank you,
David.
Edited by: 969767 on 6.11.2012 3:33

If you try to open properties dialog for application (or app shortcut) there you can see "Compatibility" tab and there is check box "Disable visual themes". If we disable this theme our java swing app is very better performance under Windows 7. We need to disable visual theme via java code, if it is possible...
Thanks.

Swing app keyboard stops working, mystery ESCAPE keystrokes appear in EDT

Java 6 Swing app. In our development environment, works great. In QA, they use it for a bit, type in a text field, click out to a Windows XP/7 app, click back in the text field, and the keyboard stops accepting keystrokes. The mouse continues to work, and the Swing app continues to paint to the screen.
I hooked up a KeyEventDispatcher to listen to what is going on. I'll post a more verbose log at the end of this post, but the short version is this. When the keyboard hangs, the log shows that 'escape' keys are being sent, though we do not do any keystroke injection in our app, ESCAPE or otherwise. Nothing on the Swing app can be determined visually to have focus.
Just before the app starts hanging, it has a side effect of not being able to be brought into the foreground by clicking on it, if, for example, one was working with Excel or Notepad, then try to click on the JFrame title of the app, or anywhere else on the app frame/internals. Once this condition happens, moving away to another Windows app, then going back to the Swing app, causes the keyboard to stop working and the KeyEventDispatcher to see 'escape' keystrokes being sent out.
Connecting remotely to the app via JVisualVM/JConsole does not show any of the threads hanging/blocked.
Sometimes you can work for hours before seeing this problem, and other times, you can start the app up and it happens right away. Once it happens, sometimes you can't recover, and sometimes you can click on a button on a navigator panel on the left side that displays an info panel on the right side, and you can start typing again in text fields.
Once this problem happens, you can start (or have already running) a completely different Swing app (ex.: StackTrace), and the keyboard will stop working for that app too, even though its running in its own separate VM.
This problem (ALMOST!) always happen when typing in a Swing text field (JTextField, JTextArea, etc.), clicking on and then typing in a Windows text area (Excel cell, Notepad), then clicking back into the Swing app's text field. A few times, we've gotten this to happen by typing in a text field, tabbing to a button, pressing a button, then tabbing/clicking back into the text field, all without leaving the Swing app. But this latter scenario is rare, usually going to/from Swing/Windows XP/7 apps cause the problem to occur more readily.
The QA computers normally use Citrix to connect and run the app, but this also happens if we run the app completely locally. But again, this only happens to some computers, all of the ones in the QA department; the development computers (the app has not been released into production yet) does not see this problem.
I had thought that our problem was this problem (Wrong characters in KeyEvents generated from input of barcode scanner but purposely slowing down the acceptance of KEY_PRESSED and KEY_RELEASED events before allowing them to go on to the Swing app (via a KeyDispatcher) did not solve the problem.
Also, we had thought it might be a Citrix problem and how it (or does it?) hook into the Windows keyboard. The fact that once one Swing app gets into this keyboard doesn't work and escape keys are being sent out by the EDT can affect another Swing app makes me wonder. We're not seeing any VM exceptions either like this (EXCEPTION_ACCESS_VIOLATION - JRE 6.0_23 - Citrix, windows 2003
Been trying to get this one solved for over a week, but with no luck. Any help/advice would be appreciated. Thank you in advance for your time.
P.S. Here's the detailed log info I generated via my KeyEventDispatch listener...
2011-04-01 11:58:17,493 [AWT-EventQueue-1] DEBUG MyKeyEventDispatcher.dispatchKeyEvent:36 - KEY1-keystroke [java.awt.DefaultKeyboardFocusManager@377369]: java.awt.event.KeyEvent[KEY_PRESSED,keyCode=27,keyText=Escape,keyChar=Escape,keyLocation=KEY_LOCATION_STANDARD,rawCode=27,primaryLevelUnicode=27,scancode=1] on javax.swing.JTextField[,320,28,175x18,layout=javax.swing.plaf.basic.BasicTextUI$UpdateHandler,alignmentX=0.0,alignmentY=0.0,border=com.ep.skin.lnf.framework.utils.internal.RoundedBorder@c3a7c0,flags=296,maximumSize=,minimumSize=,preferredSize=,caretColor=sun.swing.PrintColorUIResource[r=51,g=51,b=51],disabledTextColor=sun.swing.PrintColorUIResource[r=51,g=51,b=51],editable=true,margin=javax.swing.plaf.InsetsUIResource[top=0,left=0,bottom=0,right=0],selectedTextColor=sun.swing.PrintColorUIResource[r=51,g=51,b=51],selectionColor=javax.swing.plaf.ColorUIResource[r=184,g=207,b=229],columns=15,columnWidth=11,command=,horizontalAlignment=LEADING]
2011-04-01 11:58:17,494 [AWT-EventQueue-1] DEBUG MyKeyEventDispatcher.dispatchKeyEvent:42 - KEY2-ActiveWindow: javax.swing.JFrame[mainFrame,128,128,1024x768,invalid,layout=java.awt.BorderLayout,title=My - HQ - 17601,resizable,normal,defaultCloseOperation=DO_NOTHING_ON_CLOSE,rootPane=javax.swing.JRootPane[,0,0,1024x768,invalid,layout=com.ep.skin.lnf.framework.internal.RootPaneUI$MetalRootLayout,alignmentX=0.0,alignmentY=0.0,border=javax.swing.plaf.BorderUIResource@d0e678,flags=16777673,maximumSize=,minimumSize=,preferredSize=],rootPaneCheckingEnabled=true]
2011-04-01 11:58:17,496 [AWT-EventQueue-1] DEBUG MyKeyEventDispatcher.dispatchKeyEvent:48 - KEY3-CurrentFocusCycleRoot: javax.swing.JFrame[mainFrame,128,128,1024x768,invalid,layout=java.awt.BorderLayout,title=My - HQ - 17601,resizable,normal,defaultCloseOperation=DO_NOTHING_ON_CLOSE,rootPane=javax.swing.JRootPane[,0,0,1024x768,invalid,layout=com.ep.skin.lnf.framework.internal.RootPaneUI$MetalRootLayout,alignmentX=0.0,alignmentY=0.0,border=javax.swing.plaf.BorderUIResource@d0e678,flags=16777673,maximumSize=,minimumSize=,preferredSize=],rootPaneCheckingEnabled=true]
2011-04-01 11:58:17,497 [AWT-EventQueue-1] DEBUG MyKeyEventDispatcher.dispatchKeyEvent:54 - KEY4-FocusedWindow: javax.swing.JFrame[mainFrame,128,128,1024x768,invalid,layout=java.awt.BorderLayout,title=My - HQ - 17601,resizable,normal,defaultCloseOperation=DO_NOTHING_ON_CLOSE,rootPane=javax.swing.JRootPane[,0,0,1024x768,invalid,layout=com.ep.skin.lnf.framework.internal.RootPaneUI$MetalRootLayout,alignmentX=0.0,alignmentY=0.0,border=javax.swing.plaf.BorderUIResource@d0e678,flags=16777673,maximumSize=,minimumSize=,preferredSize=],rootPaneCheckingEnabled=true]
2011-04-01 11:58:17,498 [AWT-EventQueue-1] DEBUG MyKeyEventDispatcher.dispatchKeyEvent:60 - KEY5-FocusOwner: javax.swing.JTextField[,320,28,175x18,layout=javax.swing.plaf.basic.BasicTextUI$UpdateHandler,alignmentX=0.0,alignmentY=0.0,border=com.ep.skin.lnf.framework.utils.internal.RoundedBorder@c3a7c0,flags=296,maximumSize=,minimumSize=,preferredSize=,caretColor=sun.swing.PrintColorUIResource[r=51,g=51,b=51],disabledTextColor=sun.swing.PrintColorUIResource[r=51,g=51,b=51],editable=true,margin=javax.swing.plaf.InsetsUIResource[top=0,left=0,bottom=0,right=0],selectedTextColor=sun.swing.PrintColorUIResource[r=51,g=51,b=51],selectionColor=javax.swing.plaf.ColorUIResource[r=184,g=207,b=229],columns=15,columnWidth=11,command=,horizontalAlignment=LEADING]
2011-04-01 11:58:17,499 [AWT-EventQueue-1] DEBUG MyKeyEventDispatcher.dispatchKeyEvent:66 - KEY6-PermanentFocusOwner: javax.swing.JTextField[,320,28,175x18,layout=javax.swing.plaf.basic.BasicTextUI$UpdateHandler,alignmentX=0.0,alignmentY=0.0,border=com.ep.skin.lnf.framework.utils.internal.RoundedBorder@c3a7c0,flags=296,maximumSize=,minimumSize=,preferredSize=,caretColor=sun.swing.PrintColorUIResource[r=51,g=51,b=51],disabledTextColor=sun.swing.PrintColorUIResource[r=51,g=51,b=51],editable=true,margin=javax.swing.plaf.InsetsUIResource[top=0,left=0,bottom=0,right=0],selectedTextColor=sun.swing.PrintColorUIResource[r=51,g=51,b=51],selectionColor=javax.swing.plaf.ColorUIResource[r=184,g=207,b=229],columns=15,columnWidth=11,command=,horizontalAlignment=LEADING]
2011-04-01 11:58:17,501 [AWT-EventQueue-1] DEBUG MyKeyEventDispatcher.dispatchKeyEvent:74 - KEY7-stacktrace...
com..client.util.MyKeyEventDispatcher$StackTraceGenerationException: This exception was created to generate a stack trace, and can be safely ignored.
 at com..client.util.MyKeyEventDispatcher.dispatchKeyEvent(MyKeyEventDispatcher.java:73)
 at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(Unknown Source)
 at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(Unknown Source)
 at java.awt.DefaultKeyboardFocusManager.dispatchEvent(Unknown Source)
 at java.awt.Component.dispatchEventImpl(Unknown Source)
 at java.awt.Container.dispatchEventImpl(Unknown Source)
 at java.awt.Window.dispatchEventImpl(Unknown Source)
 at java.awt.Component.dispatchEvent(Unknown Source)
 at java.awt.EventQueue.dispatchEvent(Unknown Source)
 at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
 at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
 at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
 at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
 at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
 at java.awt.EventDispatchThread.run(Unknown Source)
2011-04-01 11:58:17,504 [AWT-EventQueue-1] DEBUG MyKeyEventDispatcher.dispatchKeyEvent:36 - KEY1-keystroke [java.awt.DefaultKeyboardFocusManager@377369]: java.awt.event.KeyEvent[KEY_RELEASED,keyCode=27,keyText=Escape,keyChar=Escape,keyLocation=KEY_LOCATION_STANDARD,rawCode=27,primaryLevelUnicode=27,scancode=1] on javax.swing.JTextField[,320,28,175x18,layout=javax.swing.plaf.basic.BasicTextUI$UpdateHandler,alignmentX=0.0,alignmentY=0.0,border=com.ep.skin.lnf.framework.utils.internal.RoundedBorder@c3a7c0,flags=296,maximumSize=,minimumSize=,preferredSize=,caretColor=sun.swing.PrintColorUIResource[r=51,g=51,b=51],disabledTextColor=sun.swing.PrintColorUIResource[r=51,g=51,b=51],editable=true,margin=javax.swing.plaf.InsetsUIResource[top=0,left=0,bottom=0,right=0],selectedTextColor=sun.swing.PrintColorUIResource[r=51,g=51,b=51],selectionColor=javax.swing.plaf.ColorUIResource[r=184,g=207,b=229],columns=15,columnWidth=11,command=,horizontalAlignment=LEADING]
2011-04-01 11:58:17,506 [AWT-EventQueue-1] DEBUG MyKeyEventDispatcher.dispatchKeyEvent:42 - KEY2-ActiveWindow: javax.swing.JFrame[mainFrame,128,128,1024x768,invalid,layout=java.awt.BorderLayout,title=My - HQ - 17601,resizable,normal,defaultCloseOperation=DO_NOTHING_ON_CLOSE,rootPane=javax.swing.JRootPane[,0,0,1024x768,invalid,layout=com.ep.skin.lnf.framework.internal.RootPaneUI$MetalRootLayout,alignmentX=0.0,alignmentY=0.0,border=javax.swing.plaf.BorderUIResource@d0e678,flags=16777673,maximumSize=,minimumSize=,preferredSize=],rootPaneCheckingEnabled=true]
2011-04-01 11:58:17,507 [AWT-EventQueue-1] DEBUG MyKeyEventDispatcher.dispatchKeyEvent:48 - KEY3-CurrentFocusCycleRoot: javax.swing.JFrame[mainFrame,128,128,1024x768,invalid,layout=java.awt.BorderLayout,title=My - HQ - 17601,resizable,normal,defaultCloseOperation=DO_NOTHING_ON_CLOSE,rootPane=javax.swing.JRootPane[,0,0,1024x768,invalid,layout=com.ep.skin.lnf.framework.internal.RootPaneUI$MetalRootLayout,alignmentX=0.0,alignmentY=0.0,border=javax.swing.plaf.BorderUIResource@d0e678,flags=16777673,maximumSize=,minimumSize=,preferredSize=],rootPaneCheckingEnabled=true]
2011-04-01 11:58:17,508 [AWT-EventQueue-1] DEBUG MyKeyEventDispatcher.dispatchKeyEvent:54 - KEY4-FocusedWindow: javax.swing.JFrame[mainFrame,128,128,1024x768,invalid,layout=java.awt.BorderLayout,title=My - HQ - 17601,resizable,normal,defaultCloseOperation=DO_NOTHING_ON_CLOSE,rootPane=javax.swing.JRootPane[,0,0,1024x768,invalid,layout=com.ep.skin.lnf.framework.internal.RootPaneUI$MetalRootLayout,alignmentX=0.0,alignmentY=0.0,border=javax.swing.plaf.BorderUIResource@d0e678,flags=16777673,maximumSize=,minimumSize=,preferredSize=],rootPaneCheckingEnabled=true]
2011-04-01 11:58:17,509 [AWT-EventQueue-1] DEBUG MyKeyEventDispatcher.dispatchKeyEvent:60 - KEY5-FocusOwner: javax.swing.JTextField[,320,28,175x18,layout=javax.swing.plaf.basic.BasicTextUI$UpdateHandler,alignmentX=0.0,alignmentY=0.0,border=com.ep.skin.lnf.framework.utils.internal.RoundedBorder@c3a7c0,flags=296,maximumSize=,minimumSize=,preferredSize=,caretColor=sun.swing.PrintColorUIResource[r=51,g=51,b=51],disabledTextColor=sun.swing.PrintColorUIResource[r=51,g=51,b=51],editable=true,margin=javax.swing.plaf.InsetsUIResource[top=0,left=0,bottom=0,right=0],selectedTextColor=sun.swing.PrintColorUIResource[r=51,g=51,b=51],selectionColor=javax.swing.plaf.ColorUIResource[r=184,g=207,b=229],columns=15,columnWidth=11,command=,horizontalAlignment=LEADING]
2011-04-01 11:58:17,510 [AWT-EventQueue-1] DEBUG MyKeyEventDispatcher.dispatchKeyEvent:66 - KEY6-PermanentFocusOwner: javax.swing.JTextField[,320,28,175x18,layout=javax.swing.plaf.basic.BasicTextUI$UpdateHandler,alignmentX=0.0,alignmentY=0.0,border=com.ep.skin.lnf.framework.utils.internal.RoundedBorder@c3a7c0,flags=296,maximumSize=,minimumSize=,preferredSize=,caretColor=sun.swing.PrintColorUIResource[r=51,g=51,b=51],disabledTextColor=sun.swing.PrintColorUIResource[r=51,g=51,b=51],editable=true,margin=javax.swing.plaf.InsetsUIResource[top=0,left=0,bottom=0,right=0],selectedTextColor=sun.swing.PrintColorUIResource[r=51,g=51,b=51],selectionColor=javax.swing.plaf.ColorUIResource[r=184,g=207,b=229],columns=15,columnWidth=11,command=,horizontalAlignment=LEADING]
2011-04-01 11:58:17,512 [AWT-EventQueue-1] DEBUG MyKeyEventDispatcher.dispatchKeyEvent:74 - KEY7-stacktrace...
com..client.util.MyKeyEventDispatcher$StackTraceGenerationException: This exception was created to generate a stack trace, and can be safely ignored.
 at com..client.util.MyKeyEventDispatcher.dispatchKeyEvent(MyKeyEventDispatcher.java:73)
 at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(Unknown Source)
 at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(Unknown Source)
 at java.awt.DefaultKeyboardFocusManager.dispatchEvent(Unknown Source)
 at java.awt.Component.dispatchEventImpl(Unknown Source)
 at java.awt.Container.dispatchEventImpl(Unknown Source)
 at java.awt.Window.dispatchEventImpl(Unknown Source)
 at java.awt.Component.dispatchEvent(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)
The above log info repeats multiple times, KEY_PRESSED and KEY_RELEASE, over and over again, for 'escape' keys.
Edited by: 850693 on Apr 7, 2011 10:16 AM (typo fix)
Edited by: 850693 on Apr 7, 2011 10:19 AM (Fixed links)

<discaimer>Don't put too much hope in my reply</disclaimer>
The only real difference is QA has the Citrix client installed on them, and development does not. You don't need to run our Swing app through a Citrix client though to cause the bug/freezing, just running it on a PC with the Citrix client seems to be enough (in theory). We've been working down a checklist of possible problems/solutions, and we've gotten to the "Install Citrix to the dev PC" item now, so I'll post back if that makes a difference or not in reproducing the problem.
I've also had QA people actually come over to a dev PC, without the Citrix client, and try to reproduce the problem, and they have not been able to. There's 'something' about their environment vs. ours, but not sure how that would manifest itself as a AWT/Swing keyboard event of mysterious escape keystrokes followed by the locking up on the keyboard, but not the whole Swing app. My personal guess is the Citirix client installing funky Windows-level keyboard driver(s), but I may be totally off on that. /shrugI read your initial post twice and couldn't find out whether you reproduce that on several different machines, so one "environmental" difference comes to mind: have you tried using another keyboard on the defective QA configuration?
Of course that doesn't explain in itself how the problem would manifest only after switching back and forth to a native Windows app, but then, with the hint that Citrix may make a difference, maybe one driver filters out repeated "Esc" keystrokes, while another doesn't, and that manifests only after a few app switches, and the system event queue, or whatever it's called in Windows, redirects the events to the target app/window?
Other than that, I wish you had investigated Jeanette's pacemaker hypothesis more... ;)
Otherwise, yeah. I have a hook in to see all AWTEvent's, but I still need to see/find what's posting the mysterious escape keys to the event queue.I assume it's what you mean, but I'll try to make that clear: you have to investigate, at the OS level, what is posting escape key events to the OS queue.
I am not a Windows developper, but I seem to understand that the following programs claims to capture keystrokes on the whole screen (not limited to a single window), with some limitations: http://www.codeproject.com/KB/winsdk/WIN_RECORDER.aspx
More generally, you should search for a Windows way to peek at the Windows' (keyboard?) event queue.
I'm not sure this could identify which DLL (if it's not originated by the material, see the defective keyboard hypothesis) is posting the events, but that's worth a try (Java for example, would enables to stuff a custom event queue that would trace info about a Java-poster).
Even if you can't identify the posting DLL, running the "key captuyre" on both the Windows host that has the Citrix window, and the Windows host that you are accessing via Citrix, may give you hints as to where the heck the key strokes originate...
Good luck, and keep us informed,
J.

Launching Swing apps in foreground remotely

We have an agent that runs on our machines waiting to start and stop java applications, but there is a problem when the application has a GUI element to it. We are using the RunTime classes and it executes applications in the background which means that GUIs cannot be seen even though they are running.
What is the secret to automatically launching java swing apps in the foreground?
Thanks in advance.

Replying to myself, as I think I've just found the answer (at least for an windows environment)
--> Just start your app with "javaw" instead of "java"
(What would be the right way to do it in Linux, for instance?)
Joao Clemente

Launching report from Swing app

How do you launch a report froma Java Swing app and how does the report get viewed and then saved?
Thanks.

hello,
there are several ways of running a report.
a) by executing rwrun
b) by submitting an HTTP request to the reports server
c) by executing rwcli to submit a request to the reports server
the output has to be viewed using either a browser window.
regards,
the oracle reports team --pw

In program written with Java Swing, I can't input Chinese

In program written with Java Swing, I can't input Chinese.
But if I change my language first, then change the input method tu U.S, open the Java Swing application, finally I can input Chinese. I want to know how to fix this bug.
My OS is Mac OS X 10.6.8.
At the JDK version 1.6.0_29, I can input Chinese friendly in Java Swing applications. But after 1.6.0_31, I can't do it anymore. The input methods can input Chinese in other non Java Swing applications so the problem must create by JDK or JRE's Swing part. What's the different between 1.6.0_29's Swing and 1.6.0_31's ? Why ? I heard that Java Swing apps not support Chinese input methods seens 2009... Why haven't fix these yet?

Chazza wrote:
Perhaps you need to change your keyboard layout in Xorg?
https://wiki.archlinux.org/index.php/Ke … ard_layout
Thanks for your answer!
I have tried to change the keyboard layout from "en" to "cn", but it is still not work.
The input method coin on the righttop is right when I change the method.But it still output english even I use ibus-pinyin.There is not a box for my choosing chinese words.
Last edited by Dilingg (2015-05-15 16:18:43)

Java Swing apps cause Windows 2K to hang

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