Re: [xmlvm-users] Interface vs abstract classes

[Leo I. <leo...@gm...>]

Do you mean:

public interface FirstOption {
 public void someMethod();
}

public abstract class SecondOption implements FirstOption {
}

Because that would be a good idea. I support it.

On Sun, Sep 12, 2010 at 6:33 AM, Arno Puder <ar...@pu...> wrote:

>
> right now we map Objective-C protocols to Java interfaces, except if
> there are optional methods in the protocol. In that case we map it to an
> abstract class.
>
> Using Java interfaces and being able to make use of multiple inheritance
> leads to better designs, IMHO. Of course you can mimic it with abstract
> classes only but the resulting design is not as 'natural'. As far as I
> can tell, the majority of the Cocoa protocols do not have optional
> methods, so making abstract base classes the default seems like a
> drastic decision.
>
> As a compromise, since you have mentioned a 'support' package that
> houses non-standard API, it would be possible to do both: Java
> interfaces and abstract base classes. This way the developer could
> choose which to use. There would be some redundancy, but if would offer
> developers a choice.
>
> Thoughts, anyone?
>
> Arno
>
>
> On 9/11/10 1:51 PM, Panayotis Katsaloulis wrote:
> > On 11 Σεπ 2010, at 5:44 μ.μ., Leo Izen wrote:
> >
> >> Java doesn't support multiple inheritance the way C++ does. This means
> that If you want your class to extend multiple types, you have to use
> interfaces.
> >
> > I know, I am not talking about general Java programming, but the specific
> implementation of ObjC library under Java.
> >
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