Groups > comp.lang.java.programmer > #2959

Why only public methods on interfaces?

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From	kramer31 <kramer.newsreader@gmail.com>
Newsgroups	comp.lang.java.programmer
Subject	Why only public methods on interfaces?
Date	Thu, 7 Apr 2011 17:09:51 -0700 (PDT)
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Could someone please explain to me the rational behind only allowing
public methods on interfaces?  In my mind, protection and interfaces
are two independent if perhaps somewhat related concepts.

For instance, I have an aspect which creates a proxy of a given
interface (which handles transaction propagation).  Now in order to
use this aspect, I need an interface (otherwise, no proxy can be
created).  However, I have some methods on this class which I would
like to proxy which are public, some are protected, some are package.
Because of this stupid restriction, I have to make all of the methods
public, or do ridiculous things with protection on inner classes.

There are other examples, too.  In fact one could imagine a case where
one would only want protected methods on an interface.

Yuck, Java, yuck.

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Why only public methods on interfaces? kramer31 <kramer.newsreader@gmail.com> - 2011-04-07 17:09 -0700
  Re: Why only public methods on interfaces? Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2011-04-07 21:48 -0300
  Re: Why only public methods on interfaces? Joshua Cranmer <Pidgeot18@verizon.invalid> - 2011-04-07 21:01 -0400
    Re: Why only public methods on interfaces? v_borchert@despammed.com (Volker Borchert) - 2011-04-08 02:43 +0000
      Re: Why only public methods on interfaces? Joshua Cranmer <Pidgeot18@verizon.invalid> - 2011-04-08 00:24 -0400
  Re: Why only public methods on interfaces? Patricia Shanahan <pats@acm.org> - 2011-04-07 21:49 -0700
    Re: Why only public methods on interfaces? Owen Jacobson <angrybaldguy@gmail.com> - 2011-04-08 01:01 -0400
      Re: Why only public methods on interfaces? Patricia Shanahan <pats@acm.org> - 2011-04-07 22:37 -0700
        Re: Why only public methods on interfaces? Peter Duniho <NpOeStPeAdM@NnOwSlPiAnMk.com> - 2011-04-08 00:14 -0700
          Re: Why only public methods on interfaces? Patricia Shanahan <pats@acm.org> - 2011-04-08 06:59 -0700
            Re: Why only public methods on interfaces? Peter Duniho <NpOeStPeAdM@NnOwSlPiAnMk.com> - 2011-04-08 07:17 -0700
              Re: Why only public methods on interfaces? Patricia Shanahan <pats@acm.org> - 2011-04-08 08:59 -0700
                Re: Why only public methods on interfaces? Peter Duniho <NpOeStPeAdM@NnOwSlPiAnMk.com> - 2011-04-08 17:27 -0700
                Re: Why only public methods on interfaces? "Mike Schilling" <mscottschilling@hotmail.com> - 2011-04-09 22:14 -0700
                Re: Why only public methods on interfaces? "Mike Schilling" <mscottschilling@hotmail.com> - 2011-04-09 22:28 -0700
                Re: Why only public methods on interfaces? Tom Anderson <twic@urchin.earth.li> - 2011-04-10 16:02 +0100
  Re: Why only public methods on interfaces? Roedy Green <see_website@mindprod.com.invalid> - 2011-04-08 03:18 -0700
    Re: Why only public methods on interfaces? Esmond Pitt <esmond.pitt@bigpond.com> - 2011-04-08 20:32 +1000
  Re: Why only public methods on interfaces? Tom Anderson <twic@urchin.earth.li> - 2011-04-08 20:34 +0100
  Re: Why only public methods on interfaces? Tom Anderson <twic@urchin.earth.li> - 2011-04-10 18:10 +0100

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