What is the relevance of Java applets?

Question

Java

The book Java Programming for Children of Grandparents' Parents learns Swing programming, writing a tic-tac-toe game, and then publishing the game on the web via an applet. Do I understand correctly that in this way we write a game in Java (Swing, JavaFX) and publish it on our website for online use? For example, is it possible to write a fool in this way for a game for two? Or is it all done via the Java web? And is it possible to write tic-tac-toe or a fool without knowing at all (Java FX and Swing) using purely Java web tools? I'm sorry for a possibly stupid question, but in a previous question I was told that Java technologies (Swing, FX) and Java web are different. That's what I'm interested in. Thank you for your attention!

Answer 1

Not of current interest. Why?
1. Not everyone who uses a browser has Java.
2. Even if there is Java, the extension for launching applets is blocked by default in modern browsers as unsafe.
3. Just when was the last time you saw such an applet?