There are only a couple of sites where I have used Java. One is here (dslreports.com) for the Java speed test. The other was secunia.com for their OSI (Online Software Inspector). However, the flash speed test works better for me now since I have a newer used computer and I use the PSI, which is installed locally and does not require Java. I could probably completely uninstall Java, for that matter. I will be thinking about that.
Added: I just uninstalled it from a Win 7 Pro 64-bit system. I had already disabled it for browsers, but had not restarted. I can't restart this system just any time, so I thought I'd just remove Java entirely. That worked fine and did not require a restart.
-- It is easier for a camel to put on a bikini than an old man to thread a needle.