One quick way, is to capture an image (bitmap) of the screen or window. In windows, you do this by pressing Ctrl+Alt+PrintScrn (all together). Then paste as usual into another application, and print from there.
Developing high-quality printing routines would would take much effort, as Java 1.1 does not include standard printing functions, and later versions are not available in most web browsers.
As the dynamic response to adjustments is a core feature of JCM, which cannot be captured on static paper, this is not a high priority.
The documentation is also dependent on hyperlinks, it is not intended to be read linearly. However, if you want to print it, a file is provided which concatenates all the web pages together:
If you wish to use JCM within presentations, you can download a package and adapt it as needed.