Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.java.programmer > #28278

Re: vocabulary

Show all headers | View raw

On Sun, 27 Apr 2014 12:52:38 -0700, Roedy Green wrote:

> On Sun, 27 Apr 2014 20:23:03 +1000, "Qu0ll" <Qu0llSixFour@gmail.com>
> wrote, quoted or indirectly quoted someone who said :
> 
>>He refers to "class or interface" which are most definitely types, not
>>instances surely?
> 
> In the sense I am looking for a generic term,
> a class is a some source code bracketed with class xxx { }
> an interface is some source code bracketed with interface xxx { }.
> 
> One way of looking at it is it is a related group of methods.
> 
> In many cases whatever you can do with a class reference you can do with
> an interface reference. You should not have spell out "class or
> interface" reference. In that case reference does mean both by default.
> 
> If I were designing Java syntax from scratch, perhaps I would have would
> made interface a modifier, e.g. interface class cf. abstract class. 
> Then we would not have the awkward implements vs extends distinction.
> 
> I wonder if we could deprecate extends and make it a synonym for
> implements. If the defined is an interface, it implies the extends
> meaning.

It seems to me that the only reason Java has both Abstract Class and 
Interface definitions is to sidestep having to implement multiple 
inheritance: if multiple inheritance was supported there would be no 
difference between them. That said, I seldom use Interface definitions 
but find the distinction can be useful.


-- 
martin@   | Martin Gregorie
gregorie. | Essex, UK
org       |

Back to comp.lang.java.programmer | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

vocabulary Roedy Green <see_website@mindprod.com.invalid> - 2014-04-26 21:09 -0700
  Re: vocabulary markspace <markspace@nospam.nospam> - 2014-04-26 21:25 -0700
    Re: vocabulary "Qu0ll" <Qu0llSixFour@gmail.com> - 2014-04-27 17:30 +1000
  Re: vocabulary Richard Maher <maher_rjSPAMLESS@hotmail.com> - 2014-04-27 14:42 +0800
  Re: vocabulary Marcel Müller <news.5.maazl@spamgourmet.org> - 2014-04-27 08:59 +0200
    Re: vocabulary "Qu0ll" <Qu0llSixFour@gmail.com> - 2014-04-27 17:33 +1000
      Re: vocabulary Marcel Müller <news.5.maazl@spamgourmet.org> - 2014-04-27 12:21 +0200
        Re: vocabulary "Qu0ll" <Qu0llSixFour@gmail.com> - 2014-04-27 20:23 +1000
          Re: vocabulary Roedy Green <see_website@mindprod.com.invalid> - 2014-04-27 12:52 -0700
            Re: vocabulary Martin Gregorie <martin@address-in-sig.invalid> - 2014-04-27 22:30 +0000
              Re: vocabulary Marcel Müller <news.5.maazl@spamgourmet.org> - 2014-04-28 08:23 +0200
              Re: vocabulary "Chris Uppal" <chris.uppal@metagnostic.REMOVE-THIS.org> - 2014-05-04 13:00 +0100
                Re: vocabulary Eric Sosman <esosman@comcast-dot-net.invalid> - 2014-05-04 08:44 -0400
  Re: vocabulary lipska the kat <lipskathekat@example.com> - 2014-04-27 09:01 +0100
    Re: vocabulary "Qu0ll" <Qu0llSixFour@gmail.com> - 2014-04-27 19:53 +1000
      Re: vocabulary lipska the kat <lipskathekat@example.com> - 2014-04-27 11:43 +0100
  Re: vocabulary Jeff Higgins <jeff@invalid.invalid> - 2014-04-27 07:14 -0400
  Re: vocabulary Jeff Higgins <jeff@invalid.invalid> - 2014-04-27 07:32 -0400

csiph-web