I have just read that Java 15 should have sealed
classes.
jep360 says:
Sealed classes and interfaces restrict which other classes or interfaces may extend or implement them.
I thought that this is exactly what a final class
does in Java.
So now I wonder: What is the difference between a final class
and a sealed class
?
final class A {...}
means that no class is allowed extendA
.sealed class A permits B {...}
means that onlyB
can extendA
but no other class is allowed to do that.