JEP proposed to target JDK 17: 409: Sealed Classes

[mark.reinhold at oracle.com]

The following JEP is proposed to target JDK 17:

  409: Sealed Classes
       https://openjdk.java.net/jeps/409

  Summary: Enhance the Java programming language with sealed classes and
  interfaces.  Sealed classes and interfaces restrict which other classes
  or interfaces may extend or implement them.

Feedback on this proposal from JDK Project Committers and Reviewers [1]
is more than welcome, as are reasoned objections.  If no such objections
are raised by 23:59 UTC on Wednesday, 12 May, or if they’re raised and
then satisfactorily answered, then per the JEP 2.0 process proposal [2]
I’ll target this JEP to JDK 17.

- Mark


[1] https://openjdk.java.net/census#jdk
[2] https://cr.openjdk.java.net/~mr/jep/jep-2.0-02.html