Unfortunately, using SpaceCadet via WebStart is a pain, one has to download the .jnlp file and right click on it. One also needs to add https://ptolemy.berkeley.edu to the list of acceptable directories.
WebStart with Java 10 requires that the .jnlp files be recompiled because Oracle broke backward compatibility.
After installing Java 10, it could be that it is no longer possible to run the Java 1.8 WebStart, so it may be necessary to uninstall Java 10 and reinstall Java 8.
WebStart/JNLP was deprecated in Java 9
We use WebStart as a prototype of the installer to get the contents of the jar files correct, so WebStart still has value to quickly test installers
We also use WebStart for SpaceCadet, see https://wiki.eecs.berkeley.edu/dopcenter/Main/Seating (UCB EECS LDAP Login required
Unfortunately, using SpaceCadet via WebStart is a pain, one has to download the .jnlp file and right click on it. One also needs to add https://ptolemy.berkeley.edu to the list of acceptable directories.
WebStart with Java 10 requires that the .jnlp files be recompiled because Oracle broke backward compatibility.
After installing Java 10, it could be that it is no longer possible to run the Java 1.8 WebStart, so it may be necessary to uninstall Java 10 and reinstall Java 8.
There is a JNLP file that was created in June, 2018 at https://ptolemy.berkeley.edu/ptolemyII/ptII11.0/jnlp-11.0.devel/vergil.jnlp
For out of date information about Ptolemy II and WebStart, see http://ptolemy.berkeley.edu/ptolemyII/ptII10.0/ptII10.0.1/doc/webStartHelp.htm