If they're just as good as a final class with directly implemented methods then this might be useful to implement FieldHandles (similiar to MethodHandles[1]) with practically zero overhead, since the JVM can optimize away a lot of runtime checks and devirtualize method calls on leaf classes.
If they're just as good as a final class with directly implemented methods then this might be useful to implement FieldHandles (similiar to MethodHandles[1]) with practically zero overhead, since the JVM can optimize away a lot of runtime checks and devirtualize method calls on leaf classes.
[1] http://docs.oracle.com/javase/8/docs/api/java/lang/invoke/Me...