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Groups > comp.lang.java.programmer > #29751 > unrolled thread

JDK 1.8.0_20 and JDK 1.7.0_67 released

Started byRoedy Green <see_website@mindprod.com.invalid>
First post2014-08-19 17:32 -0700
Last post2014-08-20 09:39 -0700
Articles 5 on this page of 25 — 8 participants

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  JDK 1.8.0_20 and JDK 1.7.0_67 released Roedy Green <see_website@mindprod.com.invalid> - 2014-08-19 17:32 -0700
    Re: JDK 1.8.0_20 and JDK 1.7.0_67 released Roedy Green <see_website@mindprod.com.invalid> - 2014-08-19 18:47 -0700
      Re: JDK 1.8.0_20 and JDK 1.7.0_67 released Wayne <nospam@all.invalid> - 2014-08-19 23:24 -0400
        Re: JDK 1.8.0_20 and JDK 1.7.0_67 released Roedy Green <see_website@mindprod.com.invalid> - 2014-08-19 20:54 -0700
          Re: JDK 1.8.0_20 and JDK 1.7.0_67 released Wayne <nospam@all.invalid> - 2014-08-20 09:24 -0400
        Re: JDK 1.8.0_20 and JDK 1.7.0_67 released Roedy Green <see_website@mindprod.com.invalid> - 2014-08-21 00:20 -0700
          Re: JDK 1.8.0_20 and JDK 1.7.0_67 released thinbluernime <thinbluernime3@gmail.com> - 2014-08-21 15:11 +0000
          Re: JDK 1.8.0_20 and JDK 1.7.0_67 released Arne Vajhøj <arne@vajhoej.dk> - 2014-08-22 16:10 -0400
            Re: JDK 1.8.0_20 and JDK 1.7.0_67 released "Chris Uppal" <chris.uppal@metagnostic.REMOVE-THIS.org> - 2014-08-23 02:18 +0100
              Re: JDK 1.8.0_20 and JDK 1.7.0_67 released Arne Vajhøj <arne@vajhoej.dk> - 2014-08-22 21:32 -0400
          Re: JDK 1.8.0_20 and JDK 1.7.0_67 released Arne Vajhøj <arne@vajhoej.dk> - 2014-08-22 16:10 -0400
        Re: JDK 1.8.0_20 and JDK 1.7.0_67 released Roedy Green <see_website@mindprod.com.invalid> - 2014-08-21 00:20 -0700
          Re: JDK 1.8.0_20 and JDK 1.7.0_67 released Wayne <nospam@all.invalid> - 2014-08-21 23:54 -0400
      Re: JDK 1.8.0_20 and JDK 1.7.0_67 released Jan Burse <janburse@fastmail.fm> - 2014-08-21 10:18 +0200
        Re: JDK 1.8.0_20 and JDK 1.7.0_67 released Wayne <nospam@all.invalid> - 2014-08-21 05:37 -0400
          Re: JDK 1.8.0_20 and JDK 1.7.0_67 released Jan Burse <janburse@fastmail.fm> - 2014-08-21 11:43 +0200
        Re: JDK 1.8.0_20 and JDK 1.7.0_67 released Arne Vajhøj <arne@vajhoej.dk> - 2014-08-22 16:12 -0400
    Re: JDK 1.8.0_20 and JDK 1.7.0_67 released Roedy Green <see_website@mindprod.com.invalid> - 2014-08-20 00:32 -0700
      Re: JDK 1.8.0_20 and JDK 1.7.0_67 released Arne Vajhøj <arne@vajhoej.dk> - 2014-08-20 09:45 -0400
        Re: JDK 1.8.0_20 and JDK 1.7.0_67 released Roedy Green <see_website@mindprod.com.invalid> - 2014-08-20 08:22 -0700
        Re: JDK 1.8.0_20 and JDK 1.7.0_67 released Roedy Green <see_website@mindprod.com.invalid> - 2014-08-20 08:28 -0700
          Re: JDK 1.8.0_20 and JDK 1.7.0_67 released Arne Vajhøj <arne@vajhoej.dk> - 2014-08-20 13:20 -0400
          Re: JDK 1.8.0_20 and JDK 1.7.0_67 released Joerg Meier <joergmmeier@arcor.de> - 2014-08-21 01:53 +0200
            Re: JDK 1.8.0_20 and JDK 1.7.0_67 released markspace <markspace@nospam.nospam> - 2014-08-21 08:42 -0700
        Re: JDK 1.8.0_20 and JDK 1.7.0_67 released Roedy Green <see_website@mindprod.com.invalid> - 2014-08-20 09:39 -0700

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#29766

FromRoedy Green <see_website@mindprod.com.invalid>
Date2014-08-20 08:28 -0700
Message-ID<bff9v91pluj4abhkubcleudt4cd24v9mf1@4ax.com>
In reply to#29764
On Wed, 20 Aug 2014 09:45:11 -0400, Arne Vajhøj <arne@vajhoej.dk>
wrote, quoted or indirectly quoted someone who said :

>
>You should have taken the advice of Joshua Bloch and used
>composition instead of inheritance.

The advantage of inheritance is you only have to override a small
number of methods. With composition, you need to wrap everything you
want to expose.

With composition, you have control over what is exposed. If a new
method appears in the base class it will not be automatically exposed.
That could be a good or a bad thing.

The big problem with inheritance is the base class ALSO uses your
overridden version, not just the clients.  That may interfere with the
inner workings.
-- 
Roedy Green Canadian Mind Products http://mindprod.com
Errors using inadequate data are much less than those using no data at all. 
~ Charles Babbage (born: 1791-12-26 died: 1871-10-18 at age: 79)

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#29771

FromArne Vajhøj <arne@vajhoej.dk>
Date2014-08-20 13:20 -0400
Message-ID<53f4d8f4$0$297$14726298@news.sunsite.dk>
In reply to#29766
On 8/20/2014 11:28 AM, Roedy Green wrote:
> On Wed, 20 Aug 2014 09:45:11 -0400, Arne Vajhøj <arne@vajhoej.dk>
> wrote, quoted or indirectly quoted someone who said :
>> You should have taken the advice of Joshua Bloch and used
>> composition instead of inheritance.
>
> The advantage of inheritance is you only have to override a small
> number of methods. With composition, you need to wrap everything you
> want to expose.

 From a practical perspective many IDE's can generate all the
delegating methods.

Arne

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#29775

FromJoerg Meier <joergmmeier@arcor.de>
Date2014-08-21 01:53 +0200
Message-ID<12so0mwc2omoe$.er48ty5vst88.dlg@40tude.net>
In reply to#29766
On Wed, 20 Aug 2014 08:28:04 -0700, Roedy Green wrote:

> On Wed, 20 Aug 2014 09:45:11 -0400, Arne Vajhøj <arne@vajhoej.dk>
> wrote, quoted or indirectly quoted someone who said :
>>You should have taken the advice of Joshua Bloch and used
>>composition instead of inheritance.
> The advantage of inheritance is you only have to override a small
> number of methods. With composition, you need to wrap everything you
> want to expose.

> With composition, you have control over what is exposed. If a new
> method appears in the base class it will not be automatically exposed.
> That could be a good or a bad thing.

Welcome to Lombok's @Delegate:

public Bla {
    @Delegate
    private final List<String> names = new ArrayList<String>();
}

Bla bla = new Bla();
bla.add("Tadaa!");

<http://projectlombok.org/features/Delegate.html>

Liebe Gruesse,
		Joerg

-- 
Ich lese meine Emails nicht, replies to Email bleiben also leider
ungelesen.

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#29785

Frommarkspace <markspace@nospam.nospam>
Date2014-08-21 08:42 -0700
Message-ID<lt541r$opp$1@dont-email.me>
In reply to#29775
On 8/20/2014 4:53 PM, Joerg Meier wrote:

> Welcome to Lombok's @Delegate:
>
> public Bla {
>      @Delegate
>      private final List<String> names = new ArrayList<String>();
> }

I've had for a while now a similar idea for Java

public class Bla implements List<String>(names) {

   private names = new ArrayList<String>();
}

Etc.

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#29767

FromRoedy Green <see_website@mindprod.com.invalid>
Date2014-08-20 09:39 -0700
Message-ID<6oj9v91373nuk8psg0vcldgfqjpspfs3ff@4ax.com>
In reply to#29764
On Wed, 20 Aug 2014 09:45:11 -0400, Arne Vajhøj <arne@vajhoej.dk>
wrote, quoted or indirectly quoted someone who said :

>
>You should have taken the advice of Joshua Bloch and used
>composition instead of inheritance.

I have written a little essay on the advantages and disadvantages of
composition and inheritance.

See http://mindprod.com/jgloss/compositionvsinheritance.html 

You might want to suggest some improvements.
-- 
Roedy Green Canadian Mind Products http://mindprod.com
Errors using inadequate data are much less than those using no data at all. 
~ Charles Babbage (born: 1791-12-26 died: 1871-10-18 at age: 79)

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