...And can you still scare up a copy?
This came up in a combination of curiosity and technical archeology today, and while there seems to have been one for the Win 3.1.x platform, I can't seem to get a hard answer. (Or, a place to download it.)
there's an SDK there, so chances are there's a jre somewhere. I'd also note that's a useful place for windows 3.11 software ;)
There was a version of Netscape Navigator that ran on Windows 3.11 (also required Win32S) and had a built-in JVM (Java 1.1) for running applets. I don't know where to find a copy now though.
The JDK that was suggested actually contains the VM as well. (Assuming it is similar to all recent JDK releases).
Also check Oracle's website as they have every version of the environment available to download.