The title says it all. I have to clear the java cache (to load a fresh version of an applet) from the command line, and the command line only, without any GUI.
I have seen http://stackoverflow.com/a/25807154/4142984 but when I try
Sorry, I thought you were talking about Java memory cache...
I think you got downvoted because your question is out of topic, and unclear. From this "GUI", you must see where your cache is stored.
Mine is here:
/home/ju/.cache/icedtea-web/cache ; then I must do
rm -rf /home/ju/.cache/icedtea-web/cache/*
to remove its content.