We can't give advice about circumventing employers' rules. So my advice is:
1. If you need Java for your work, go and discuss this with the IT department. A statement from your manager that it's necessary for your work is a big help in such cases. it's up to them to find a solution then.
2. If it's only for private purposes, don't do it at work.
Recently, guys from IT in my work blocked access to Java in all browsers. I don't have administrator privileges. I tried to get around this by installing Firefox portable on USB drive. I've also installed Portable Java. Everything seems to be ok, but unfortunately in the available plug-ins there is no Java. I've searched a bit and tried some advices : deleting some files from the folder "bin" java portable and change it with other files, or combining something from the environment variable "MOZ_PLUGIN_PATH". Unfortunately, nothing helps. Could someone help me ??
I have at home versions:
Anyone know how to do that work ?? And carbon, I'm not an expert in a software tricks, and if someone wrote back to me like to a layman I would be doubly grateful.