Does anyone still use JSP and Applets?

Unfortunately, yes. There is an absolutely shocking amount of Java still used (and still being written!) for web applications and middleware despite it being entirely unsuitable for the purpose. Thankfully applets have pretty much gone as a direct result of browsers making it difficult for average users to enable that functionality. But the back-end stuff inexplicably remains.

The theory is that the massive push of Java as the teaching language of choice in academia from the late 90s onwards has produced a generation of coders who view it as ubiquitous. There were taught how to do everything in Java but apparently never taught whether or not they should. The result is massive, resource-hungry, slow, brittle, insecure web applications which would have been so much better written in almost anything else (even PHP). Java is no doubt great for writing mobile apps for Android but that's about it.