Both Java and Go require that a method be instantiated in the declared interface of the type at compile time. This is contrary to the point of late binding.
In the case of Go, this cannot be detected, because everything is built together. But with Java, you cannot call a method on an object unless that method has *already *been defined. In other words, late binding supports the following order of things: 1) Write class A, with method X and only X. Compile it. 2) Write class B, which instantiates class A and calls method Y (which does not exist yet). Compile it. 3) Extend class A to add method Y. Compile it. 4) Execute class B. Late binding says this should work, but the Java compiler will throw an error at step two. Go never throws that error, because Go only builds the whole program at once, so the partial compilations don't make sense. In addition, any method marked final does not support late binding - indeed, this is the point of the keyword, and is why I remarked that this is because they couldn't figure out how to do it efficiently. Thomas On Tue, Nov 22, 2022 at 11:25 AM Robert Engels <reng...@ix.netcom.com> wrote: > Why do you say that Java does not have late binding. It 100% does. In fact > the JVM supports dynamic dispatch to make this as efficient as possible. > Then the JIT optimizes it even more based on runtime behavior. > > On Nov 22, 2022, at 10:18 AM, Matt KØDVB <m...@k0dvb.com> wrote: > > > But see https://en.wikipedia.org/wiki/Self_(programming_language) > > Self was considered an OO language back when I was a grad student and is > still listed that way today, even though it has neither classes nor > inheritance. > > Anyway, my point would be that the term OO originates with Alan Kay and > the team at Xerox PARC; Kay’s response to the OO flame wars was to > de-emphasize classes and inheritance. > > Of course, using his definition, neither Java nor Go would be “truly” OO > since not all things use late binding :-) > > Perhaps we can talk about class-based and non-class based OO languages? > > On Tue, Nov 22, 2022 at 10:07 AM Robert Engels <reng...@ix.netcom.com> > wrote: > >> The wiki OO page lists classes as a requirement - but not necessarily >> inheritance. Class variables require classes. >> >> Also, your link does not work. >> >> > On Nov 22, 2022, at 9:56 AM, Jan Mercl <0xj...@gmail.com> wrote: >> > >> > On Tue, Nov 22, 2022 at 4:43 PM Robert Engels <reng...@ix.netcom.com> >> wrote: >> > >> >> Go is not listed as an OO language on Wikipedia. >> > >> > Check https://en.wikipedia.org/wiki/Go_(programming_language): >> > "ParadigmMulti-paradigm: concurrent imperative, object-oriented[1][2]" >> > >> >> Personally I think it is OO-like. OO typically has inheritance. >> > >> > Typically they may, but that's not the same as what a requirement >> > would be, right? >> > >> >> There are also no “class variables” - only package level - which makes >> some encapsulation patterns harder (every class has to become a package). >> > >> > No class has to become a package because Go has no classes. You may >> > think of what a "class" in Go means, but you have not defined that >> > idea and the language specification is somehow silent about Go >> > classes. >> > >> > -- >> > You received this message because you are subscribed to the Google >> Groups "golang-nuts" group. >> > To unsubscribe from this group and stop receiving emails from it, send >> an email to golang-nuts+unsubscr...@googlegroups.com. >> > To view this discussion on the web visit >> https://groups.google.com/d/msgid/golang-nuts/CAA40n-U%3DG8gqAZEHrnLUxbg5vsAcRkNV35c86c79xcrhSzLSWw%40mail.gmail.com >> . >> >> -- >> You received this message because you are subscribed to the Google Groups >> "golang-nuts" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to golang-nuts+unsubscr...@googlegroups.com. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/golang-nuts/A1F03B77-7CDC-46CC-B2E0-2C3C1B7DC966%40ix.netcom.com >> . >> > > > -- > > Matt > K0DVB > > -- > You received this message because you are subscribed to the Google Groups > "golang-nuts" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to golang-nuts+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/golang-nuts/CANRS-2%2Bre6WUFT6tE8QinUZ-ipqLvwNTr2hoHNiD4H%3DwQ8T7HA%40mail.gmail.com > <https://groups.google.com/d/msgid/golang-nuts/CANRS-2%2Bre6WUFT6tE8QinUZ-ipqLvwNTr2hoHNiD4H%3DwQ8T7HA%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > > -- > You received this message because you are subscribed to the Google Groups > "golang-nuts" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to golang-nuts+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/golang-nuts/A5532469-6B1D-4C18-8DBE-F03FD56E8830%40ix.netcom.com > <https://groups.google.com/d/msgid/golang-nuts/A5532469-6B1D-4C18-8DBE-F03FD56E8830%40ix.netcom.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. 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