On Mon, Jan 28, 2019 at 2:21 PM Pascal Schumacher <pascalschumac...@gmx.net> wrote:
> Am 28.01.2019 um 20:01 schrieb Rob Tompkins: > > Before I vote on the the thread, does adding a method to an interface > cause BC to break? > > "Adding a method to an interface does not break compatibility with > pre-existing binaries." > Of course it does break: I create a library L with interface A declaring method M1, L calls M1 internally, and release it as 1.0. You implement A in your app as ImplA. I release 2.0 with A declaring M2 in A and also calling M1 and M2 internally. Your app updates to 2.0 and blows up when L tries to call M2 on ImplA. With Java 8, I can declare M2 as a _default_ method and nothing blows up, you just get a default behavior that might be helpful or even be harmful. Gary > > Source: > https://docs.oracle.com/javase/specs/jls/se7/html/jls-13.html#jls-13.5.1 > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org > For additional commands, e-mail: dev-h...@commons.apache.org > >
