I am using Ubuntu 19.10 in 2020.
Download Java (not sure how to do this, since I already had it installed). Make sure you have a command called appletviewer
.
Download http://theuncertainfuture.com/UfApplet.jar
Download http://theuncertainfuture.com/commons-math-1.2.jar
Make a file called index.html
with the following:
<applet code="org.singinst.uf.view.UfApplet" archive="UfApplet.jar,commons-math-1.2.jar" height="660" width="900"></applet>
Run the following in a command line:
appletviewer index.html
A window should pop up, with the applet running.
This doesn't reproduce the full experience of the applet, because the applet in addition had a way to load some preset parameter values via JavaScript. These are loaded via pages like http://theuncertainfuture.com/ufHelp/Q1.html You can find a list of all such pages at https://github.com/kanzure/uncertainfuture/tree/master/web/ufHelp I don't know how to get the JavaScript to interact with the Java applet, but this doesn't seem to be necessary: you can just look at the source code of the help pages to see what parameter values would have been loaded if you had clicked on each button, and then enter those values by hand.
Here is a screenshot of what it looks like: