On Mon, 28 Mar 2022 16:30:50 GMT, Phil Race <p...@openjdk.org> wrote:
> JDK 17 delivered JEP 409: Sealed Classes : https://openjdk.java.net/jeps/409 > In essence this JEP allows a class to limit which classes can subclass it. > If a class has no subclasses and cannot be subclassed outside the JDK it can > also be made final. > Suitable classes across the JDK are being retro-fitted to be sealed (or made > final) where it can be done compatibly. > This fix takes care of several AWT classes which were identified. > If later we need to remove sealed or make a class non-final that will also be > a compatible change, > so we aren't locking ourselves into this. > > All our automated regression tests - plus JCK tests have been run. > > This will require a CSR I *think* Sergey is asking how javac identifies classes that are sub-classing the sealed class but not listed in the permits clause ? ------------- PR: https://git.openjdk.java.net/jdk/pull/7998
