JSR 392 (Java SE 17): JEP Propose to Target: 409: Sealed Classes

Iris Clark iris.clark at oracle.com
Thu May 6 17:23:37 UTC 2021

The following JEP with scope "SE" has been proposed to target JDK 17:

  409: Sealed Classes

  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.

The announced deadline for feedback to jdk-dev is Wed 12 May 23:59 UTC:


If there are no unresolved objections at that time, then the JEP will be moved
to the Targeted state, indicating that the feature is expected to appear in
the specified release of the JDK Project.  For more information about states,
see the JEP Process document:


A dashboard that lists JEPs with "SE" scope may be found via a link on this



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