JFileChooser causes hang

I have written a Java application that I run on Unix and PC. In PC (Windows 2000, JVM version 1.4.1_01), sometimes my application will hang at the following line:
fileChooser = new JFileChooser(System.getProperty("user.dir")+
System.getProperty("file.separator");
If I reboot my PC, it will work again. But I would like to know the real reason. Is there a bug in Java Hotspot?
BTW, it never has any problem in Solaris Unix.
Any help would be appreciated.

Hello,
do you are sure to get installed the JRE 1.4.1 correctly ?
It looks like an incompatibility of the DLL's of your operating system (Windows NT ?) with the JRE.
regards
rko

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*** First throw call stack:
0   CoreFoundation                      0x00007fff94a7566c __exceptionPreprocess + 172
1   libobjc.A.dylib                     0x00007fff95fc076e objc_exception_throw + 43
2   CoreData                            0x00007fff935429b9 -[NSManagedObjectContext objectWithID:] + 793
3   CalendarPersistence                 0x00007fff8c684a1c -[CalDAVScheduleEventQueueableOperation performSchedule] + 143
4   CalendarPersistence                 0x00007fff8c4fb3c6 -[CalDAVQueueableOperation performOperationSynchronously] + 71
5   Foundation                          0x00007fff97d6290a __NSThread__main__ + 1345
6   libsystem_pthread.dylib             0x00007fff9ac9a268 _pthread_body + 131
7   libsystem_pthread.dylib             0x00007fff9ac9a1e5 _pthread_body + 0
8   libsystem_pthread.dylib             0x00007fff9ac9841d thread_start + 13
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1/30/15 4:12:19.330 PM CalendarAgent[15860]: [com.apple.calendar.store.log.caldav.queue] [This change request has been materialized into a queueable operation 3337 times before. Change request: [<CalManagedScheduleChangeRequest: 0x7fe8594988c0> (entity: ScheduleChangeRequest; id: 0x284002cb <x-coredata://0F91837F-5E97-4DEC-86AD-C0298002F838/ScheduleChangeRequest/p161> ; data: {
    dependencies = "<relationship fault: 0x7fe8595c2720 'dependencies'>";
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    eTag = "\"79831-79831\"";
    error = nil;
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    scheduleData = "BEGIN:VCALENDAR
\nVERSION:2.0
\nMETHOD:REPLY
\nCALSCALE:GREGORIAN
\nBEGIN:VEVENT
\nDTEND;VALUE=DATE:20150413
\nPRIORITY:0
\nORGANIZER:mailto:MAILTO:[email protected]
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    scheduleTag = nil;
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    sharedUID = "5e40ca89-2939-468f-ad52-3dde18924a89";
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})]. First materialized date: [2015-01-25 18:59:12 +0000]. Existing error: [(null)]]
1/30/15 4:12:19.448 PM CalendarAgent[15860]: Exception fetching ABCDContact in context <ABManagedObjectContext: 0x7fe8596c4330>: keypath birthdayComponents not found in entity <NSSQLEntity ABCDContact id=21>
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!http://i50.tinypic.com/izvwo1.gif!

PS CC (since JAN 2014 update) Layer-mask editing causes hangs/crashes

ONLY since JAN 2014 update, PS CC has been hanging/crashing when I paint/edit a layer mask. All may be well at first (or not), but suddenly the display of the mask (or mask overlay on the layer itself, as shown when hitting backslash key) is not shown in full but renders in s-l-o-w-l-y in rectilinear pieces <snapshot below was taken before video card upgraded but is still typical of what I mean>. When I view Windows' Task Manager for PS, I see my CPUs are each working at their upper limits (up to 80+-90+%), varying only by a few points, over a VERY long time... which could be MANY minutes. OR the System has decided PS is Not Responding.
In any case, whenever this happens, it means in all practicality PS CC is not working, so I either kill it or it's crashed.
Now, here's the thing: that VERY file, can immediately be opened in PS CS6 (which I have fortunately kept installed on my computer), and the mask will be as I thought it should be, and I can edit it as I always could, just fine! So it's obviously a PS CC thing, and I do NOT recall this happening prior to the JAN update. It is still a problem after the two subsequent updates.
I have not been able to determine the specific instances when this happens, as it seems to happen whenever I am editing a mask, no matter what size/softness/color brush, what magnification, what view mode, many or few layers, big or small file, etc.
I did upgrade my NVIDIA card (from GeForce GTX 260 [with current driver] to GTX660), just in case it was a factor (maybe kept it from crashing as fast? hard to tell... but it's still an unworkable problem). You can see from my Sys Info shown here from the PS CC Help menu that it should be more than sufficient for any PS CC task, and it's running the latest driver:
Adobe Photoshop Version: 14.2.1 (14.2.1 20140207.r.570 2014/02/07:23:00:00) x64
Operating System: Windows 7 64-bit
Version: 6.1 Service Pack 1
System architecture: Intel CPU Family:6, Model:14, Stepping:5 with MMX, SSE Integer, SSE FP, SSE2, SSE3, SSE4.1, SSE4.2
Physical processor count: 4
Processor speed: 2664 MHz
Built-in memory: 16379 MB
Free memory: 12453 MB
Memory available to Photoshop: 14697 MB
Memory used by Photoshop: 60 %
Image tile size: 1024K
Image cache levels: 4
Font Preview: Medium
TextComposer: Latin
Display: 1
Display Bounds: top=0, left=0, bottom=1200, right=1920
OpenGL Drawing: Enabled.
OpenGL Allow Old GPUs: Not Detected.
OpenGL Drawing Mode: Advanced
OpenGL Allow Normal Mode: True.
OpenGL Allow Advanced Mode: True.
AIFCoreInitialized=1
AIFOGLInitialized=1
OGLContextCreated=1
NumGPUs=1
gpu[0].OGLVersion="3.0"
gpu[0].MemoryMB=2048
gpu[0].RectTextureSize=16384
gpu[0].Renderer="GeForce GTX 660/PCIe/SSE2"
gpu[0].RendererID=4544
gpu[0].Vendor="NVIDIA Corporation"
gpu[0].VendorID=4318
gpu[0].HasNPOTSupport=1
gpu[0].DriverVersion="9.18.13.3221"
gpu[0].Driver="nvd3dumx.dll,nvwgf2umx.dll,nvwgf2umx.dll,nvd3dum,nvwgf2um,nvwgf2um"
gpu[0].DriverDate="20131219000000.000000-000"
gpu[0].CompileProgramGLSL=1
gpu[0].TestFrameBuffer=1
gpu[0].OCLPresent=1
gpu[0].OCLVersion="1.1"
gpu[0].CUDASupported=1
gpu[0].CUDAVersion="6.0.1"
gpu[0].OCLBandwidth=1.16816e+011
gpu[0].glGetString[GL_SHADING_LANGUAGE_VERSION]="4.40 NVIDIA via Cg compiler"
gpu[0].glGetProgramivARB[GL_FRAGMENT_PROGRAM_ARB][GL_MAX_PROGRAM_INSTRUCTIONS_ARB]=[16384]
gpu[0].glGetIntegerv[GL_MAX_TEXTURE_UNITS]=[4]
gpu[0].glGetIntegerv[GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS]=[192]
gpu[0].glGetIntegerv[GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS]=[32]
gpu[0].glGetIntegerv[GL_MAX_TEXTURE_IMAGE_UNITS]=[32]
gpu[0].glGetIntegerv[GL_MAX_DRAW_BUFFERS]=[8]
gpu[0].glGetIntegerv[GL_MAX_VERTEX_UNIFORM_COMPONENTS]=[4096]
gpu[0].glGetIntegerv[GL_MAX_FRAGMENT_UNIFORM_COMPONENTS]=[2048]
gpu[0].glGetIntegerv[GL_MAX_VARYING_FLOATS]=[124]
gpu[0].glGetIntegerv[GL_MAX_VERTEX_ATTRIBS]=[16]
gpu[0].extension[AIF::OGL::GL_ARB_VERTEX_PROGRAM]=1
gpu[0].extension[AIF::OGL::GL_ARB_FRAGMENT_PROGRAM]=1
gpu[0].extension[AIF::OGL::GL_ARB_VERTEX_SHADER]=1
gpu[0].extension[AIF::OGL::GL_ARB_FRAGMENT_SHADER]=1
gpu[0].extension[AIF::OGL::GL_EXT_FRAMEBUFFER_OBJECT]=1
gpu[0].extension[AIF::OGL::GL_ARB_TEXTURE_RECTANGLE]=1
gpu[0].extension[AIF::OGL::GL_ARB_TEXTURE_FLOAT]
I work on digital-photography files, and use a layer mask in almost every file, so this relatively-recent bug is a big PITA, having to switch back and forth between CS6 and CC!
Until there's a fix... is there a way to roll-back my PS CC version to BEFORE the JAN 15, 2014 update?

I am not qualified to comment on technical issues; I'm just a user whose son in IT is my 'technical support department.' (But he's not much of a PS user.)
I'm pretty sure, however, that all my Prefs were set to the same things BEFORE the Jan 16, 2014 PS CC update as after (unless the update itself changed something I was unaware of... the settings APPEARED to be the same but I can't easily locate my notes of what my Prefs were from long ago).
And they were the same as the PS CS6 I have had installed on this same system for a very long time, with older video card with older driver, with newer driver; newer video card with newest driver, etc. Yet after that CC update, CC has not (until this workaround) worked re 'the masking bug' for me, yet CS6 has always worked just the same.
So I conclude that the only variable (other than the video card upgrade I did in an attempt to solve this and of course those Windows auto-updates) in this scenario IS something to do with PS *CC*, and after Jan 16, 2014.
As for restarting the machine vs. restarting PS, well, PS is the major player of my system, so when I shut that (and LR) down, I might as well 'clean things up' by Restarting. BTW, I am in the habit of closing and reopening PS (CC or CS6) whenever I finish with a file and load another, in order to get back some of that memory which PS never seems to want to let go. (This is not new to the latest versions, I think. My son says it's a 'memory hog'? ;-) ) I track its memory use in Windows' Task Manager and find that seems to let it 'refresh' itself. (See, I told you I'm not a technical person. ;-) ) But I do not think this has anything to do with the bug. Just a quirk of PS. Like when a tool goes all wonky (for example, its little icon becomes just a 'plus' sign even though the tool is still performing correctly, it's telling me, I think, that it would like to be restarted. And that makes it feel all better... I mean, tool icon reappears.)
Anyway... it's up to Adobe to figure out IF and what may be wrong with PS CC -- it still doesn't work for me as I had it configured at first, and I think it should, right? -- and to fix that... PLEASE. SOON.

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