Hello! The current spec draft [1] tells nothing about the possibility to migrate an existing class to the record or vice versa. I believe such a migration could be safe, taking into account all the implicit declarations the records have. E.g. if I linked before to a library final class named Point, called a constructor like Point(int, int) and used equals/hashCode/toString, then converting it to the record Point(int x, int y) in the library would not break my client code. Should not we have some kind of explicit statement about record<=>class binary compatibility?
With best regards, Tagir Valeev. [1] http://cr.openjdk.java.net/~gbierman/jep359/jep359-20191125/specs/records-jls.html#jls-13.4.27
