weird java error, maybe one of you can help

Hmm... You could be victim of a virus. Best solution would be to use a Mac but if that's not an option, you may check that you don't have a virus and your software is all up to date. I've had issues with java on my windows computer as well but nothing like that.

hey...I just solved this...I opened this nvidia manager and it showed graphic artefacts too. I checked the temperature of my gpu and it was way high, so I cleaned the fan...now everything is fine again.

Good to here. Not keeping clean computers is something many of us often miss and does contribute to many problems. Glad to here it's fixed and thank you for sharing the solution.

yeah I already had that overheating problem once, it happens very fast but it's important to clean everything out once in a while. especially if the graphics card overheats that's not so good. and since I wasn't gaming I didn't notice it, didn't even know that java uses the card like that, I mean everything other than that was fine.

what is the nvidia manager? do i have one? and how did you check the temperature of your gpu...you mean cpu? you mean that little thing inside the case that is the 'power supply?'

i thought i might have an overheating problem. i was finally told there is nothing wrong with my pc, but the wires are not grounded in the house, so current is coming into the pc, and if that is fixed i would have no trouble. i have been shocked by the case, and my microwave as well, so i believe the whole house isnt grounded. so far i havent managed to get anyone to take care of it.

it comes with the nvidia drivers, if you an nvidia card. you can set all kinds of stuff there, I don't know how it's called exactly I just guessed. I'm on my laptop now, only have that at home.
I checked the temperature with a program called everest, gives you all kind of information on your system. including the cpu temperature and the gpu(graphics processing unit, which is the processor on your video card). there are numerous other tools though, just search on google.
yeah I cleaned all the fans, the one in the power supply, the one on my cpu and the one on my gpu.

Well I never heard about that...never have been shocked by anything in my house

One of the handiest applications around is Everest; not only will it detail all the hardware on your system, it will also give you temperature and fan readings, as well as voltage information.

Here is a link (and it's absolutely FREE):
|MG| EVEREST Free Edition 2.20 Download