Are Applets and Java Web Start part of Java Core?

Question

Java

1. Are applets and JWS Java Core?
2. Are they still used in commercial development, and do they require knowledge of these technologies, for example, for Junior?

Answer 1

1. Formally Applets and JWS are J2SE, thus can be attributed to Java Core.
2. In practice, it is practically not used due to the inconvenience that needs to be addressed with security:
a) applets must be signed with a registered certificate and, as far as I know, it is necessary to update the certificate every six months. If you sign not registered, you have to put down a bunch of permissions in browsers.
b) JWS - the client must trust you to run something downloaded over the network.
So, if junior does not know this, it's okay.