Scala private subclass class in external projects

Question

Indication of Scala documentation:

A sealed class cannot be directly inherited, unless the inheriting template is defined in the same source file as the inherited class. However, subclasses of a private class can be inherited anywhere.

If I create a hierarchy of sealed classes in my project, all this is fine, for example:

sealed abstract class Base {}
sealed class Derived extends Base {}

But what if I compile the project and distribute it like, say, a JAR in Maven.

What if I write a Java class in a second project that has a JAR in the classpath:

public class Breaker extends Derived {}

Will it compile aka, will the hold still hold? What if I wrote Breakerin Scala?

If sealing works in the situations described in abouve, how to do it?

Answer 1

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Answer 2

sealed , javap RuntimeVisibleAnnotations, , Scala Java sealed, :

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