[anthony88]

Even if Applets are no longer used in the browser, they are a good candidate for a plugin system. That's what I did in some of my software: just provide a file or url and you have another software running in my software.

Searching for "extends JApplet" returns more than 50,000 results on github.com. SwingSet2 for example is also using the class JApplet. Removing the 6 classes will break some stuff, including all my desktop apps.