[java] Blurry screen from commandline
Author
Hi,
Whenever I run a program from the command line using the javac and java commands the whole screen goes all blurry. Until I close the program at which point the screen is restored back to normal.
Any idea why this might be ?
It doesnt happen when I run programs from JCreator...
Thanks
Chris
First off, let me say "WTF?". Very strange behavior.
Putting that aside, though, I don't know that you've given enough information... maybe you could slap a sample case on a server somewhere for the rest of us to see? Try to find the smallest possible code snippet that exhibits this behavior. Also, what version of Java? What OS?
I think a lot of times when very general problem is posted, that indicates a lack of digging for oneself -- if you look into this, you might find an obvious culprit. Still, the behavior is so strange that if you DO find it, I'd really like to hear what it was. If you can't find it, at least give us some details to work with and we'll go from there.
Putting that aside, though, I don't know that you've given enough information... maybe you could slap a sample case on a server somewhere for the rest of us to see? Try to find the smallest possible code snippet that exhibits this behavior. Also, what version of Java? What OS?
I think a lot of times when very general problem is posted, that indicates a lack of digging for oneself -- if you look into this, you might find an obvious culprit. Still, the behavior is so strange that if you DO find it, I'd really like to hear what it was. If you can't find it, at least give us some details to work with and we'll go from there.
Author
Hi, sorry heres some more details
OS:WindowsXP
Graphics:GeForce 5200FX
JAVA: 1.4.01 (I did d/l 5.01 but not sure if its being used, how can I tell?)
(I also have Java3D installed)
I thought I had it locked down to something wrong with Swing it usually happens when im using Jframes. But some programs with Swing work fine... its weird maybe something to do with my graphics card, im using the NVidia stereo drivers so there might be a clash with Java there.
The only programs I have online that causes the error are some courseworks ive done that you can d/l here ... (only the .class files tho).
http://www.students.ncl.ac.uk/chris.pook/uni.html (might not run to smooth)
or here
http://www.students.ncl.ac.uk/chris.pook/dissertation.html (download the demo)
Both of these give me the blurry screen when I run them from the command line.
Is it possible to uninstall java and reinstall a fresh copy? Maybe that would help...
Any ideas as to why greatly appreciated.
Thanks
Chris Pook
OS:WindowsXP
Graphics:GeForce 5200FX
JAVA: 1.4.01 (I did d/l 5.01 but not sure if its being used, how can I tell?)
(I also have Java3D installed)
I thought I had it locked down to something wrong with Swing it usually happens when im using Jframes. But some programs with Swing work fine... its weird maybe something to do with my graphics card, im using the NVidia stereo drivers so there might be a clash with Java there.
The only programs I have online that causes the error are some courseworks ive done that you can d/l here ... (only the .class files tho).
http://www.students.ncl.ac.uk/chris.pook/uni.html (might not run to smooth)
or here
http://www.students.ncl.ac.uk/chris.pook/dissertation.html (download the demo)
Both of these give me the blurry screen when I run them from the command line.
Is it possible to uninstall java and reinstall a fresh copy? Maybe that would help...
Any ideas as to why greatly appreciated.
Thanks
Chris Pook
I'd agree that its very odd. I've been java coding for fun and profit for about 5 or 6 years now and I've never ever seen anything that would make the screen go 'blurry'. particularly something that only happens when run from the command line but not from an IDE. Exactly what do you mean by 'blurry' ??
I'd download and check out source if you provide it, I won't however download and run an arbitary class file put up by someone I don't know :-)
D.
I'd download and check out source if you provide it, I won't however download and run an arbitary class file put up by someone I don't know :-)
D.
I tried CrashTV, and didn't get the blurry effect. You can check the version of java you're using by a quick "java -version" ("1.5.0" is the one I tested against since I don't have 1.4.X on this computer anymore). The java version you use from the command line *may* be different from the one your JCreator is using (so that's a definite possibility as the culprit). 1.4.01 is old also... in fact, I think you might be missing a .2 in there (1.4.2.01), but even so there's a more recent 1.4.2 if that is the case.
Yes, it is definitely possible to uninstall java and install a fresh copy, and that's exactly what I'd recommend you try. If that still isn't fixing it, I would try a fresh video driver install also.
Try that out, and let me know if you are still having issues.
Yes, it is definitely possible to uninstall java and install a fresh copy, and that's exactly what I'd recommend you try. If that still isn't fixing it, I would try a fresh video driver install also.
Try that out, and let me know if you are still having issues.
Do you have a TFT/Flatscreen monitor?
In this case, maybe the program is running with a resolution that is below or above the optimal/native resolution of your flat panel screen, which will then cause it to filter (blur) the images. When returning to windows, your desktop will take the optimal resolution again, which is crisp and not blurry.
Just a guess. :)
In this case, maybe the program is running with a resolution that is below or above the optimal/native resolution of your flat panel screen, which will then cause it to filter (blur) the images. When returning to windows, your desktop will take the optimal resolution again, which is crisp and not blurry.
Just a guess. :)
Author
Thanks for the ideas...
Ill try reinstalling java and see if it makes a difference.
daireq:
By blurry I mean everything on the screen seems a bit out of focus. Its really weird. Ill let you know if the reinstall works or if I find out the reason.
Thygrrr:
I have a CRT monitor, but I am starting to think the display drivers may be the problem. Especially since I use non standard stereo ones.
pirate_dau:
Out of interest how did CrashTV run on your computer, its fine on mine but some people say it is really slow...
Cheers
Chris
Ill try reinstalling java and see if it makes a difference.
daireq:
By blurry I mean everything on the screen seems a bit out of focus. Its really weird. Ill let you know if the reinstall works or if I find out the reason.
Thygrrr:
I have a CRT monitor, but I am starting to think the display drivers may be the problem. Especially since I use non standard stereo ones.
pirate_dau:
Out of interest how did CrashTV run on your computer, its fine on mine but some people say it is really slow...
Cheers
Chris
Author
I think I may have found the cause. First I did this ...
C:\Documents and Settings\Chris>java -version
java version "1.5.0_01"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_01-b08)
Java HotSpot(TM) Client VM (build 1.5.0_01-b08, mixed mode)
Then I looked in the add/remove programs Control Panel, and I have the following entries ...
J2SE Development Kit 5.0 Update 1
J2SE Runtime Environment 5.0
J2SE Runtime Environment 5.0 Update 1
Java 2 Runtime Environment, SE v1.4.0_01
Java 2 Runtime Environment, SE v1.4.2_03
Java 2 SDK, SE v1.4.0_01
Java 3D 1.3.1 (DIrect X) SDK
Then I have the following directories in Windows ...
C:\j2sdk1.4.0_01
C:\jdk1.5.0_01
C:\Program Files\Java\j2re1.4.0_01
C:\Program Files\Java\j2re1.4.2_03
C:\Program Files\Java\jre1.5.0
C:\Program Files\Java\jre1.5.0_01
Should I have so many of these, surely I only need one in each?
Also I have a program in Control Panels which when I open it... gives me the blurry screen :(
Chris
C:\Documents and Settings\Chris>java -version
java version "1.5.0_01"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_01-b08)
Java HotSpot(TM) Client VM (build 1.5.0_01-b08, mixed mode)
Then I looked in the add/remove programs Control Panel, and I have the following entries ...
J2SE Development Kit 5.0 Update 1
J2SE Runtime Environment 5.0
J2SE Runtime Environment 5.0 Update 1
Java 2 Runtime Environment, SE v1.4.0_01
Java 2 Runtime Environment, SE v1.4.2_03
Java 2 SDK, SE v1.4.0_01
Java 3D 1.3.1 (DIrect X) SDK
Then I have the following directories in Windows ...
C:\j2sdk1.4.0_01
C:\jdk1.5.0_01
C:\Program Files\Java\j2re1.4.0_01
C:\Program Files\Java\j2re1.4.2_03
C:\Program Files\Java\jre1.5.0
C:\Program Files\Java\jre1.5.0_01
Should I have so many of these, surely I only need one in each?
Also I have a program in Control Panels which when I open it... gives me the blurry screen :(
Chris
CrashTV didn't really work at all on my computer. It wasn't playable anyway -- the screen filled up with green things in about half a second. I didn't really do much more than load it up to see if the problem was reproducable, though. I tried running it on a 2.8 GHz P4 with 1 GB RAM.
It shouldn't be a problem having multiple JREs/JDKs installed -- but it can make things more difficult to debug for the reason that you might not be running off the JVM you think you are.
It shouldn't be a problem having multiple JREs/JDKs installed -- but it can make things more difficult to debug for the reason that you might not be running off the JVM you think you are.
Author
Yea same problem most people get with it, oh well ...
Right im downloading the 1.4.2_08 SDK now. Once I have it I will unistall all of my previous installations and start from scratch. Will I need to do anything other than remove them using the control panel and delete the associated folders ?
Ill let you know if this rectifies the problem (may take a while, im on dial-up)
Cheers
Chris
Right im downloading the 1.4.2_08 SDK now. Once I have it I will unistall all of my previous installations and start from scratch. Will I need to do anything other than remove them using the control panel and delete the associated folders ?
Ill let you know if this rectifies the problem (may take a while, im on dial-up)
Cheers
Chris
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