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Groups > comp.lang.java.programmer > #22130
| From | markspace <markspace@nospam.nospam> |
|---|---|
| Newsgroups | comp.lang.java.programmer |
| Subject | Re: Design Patterns |
| Date | 2013-02-05 13:56 -0800 |
| Organization | A noiseless patient Spider |
| Message-ID | <kerv5k$90n$1@dont-email.me> (permalink) |
| References | (2 earlier) <singleton-20130204174059@ram.dialup.fu-berlin.de> <51106eff$0$293$14726298@news.sunsite.dk> <singleton-20130205050434@ram.dialup.fu-berlin.de> <1g6plnhx9njxt$.bx5mrpbwc6mi$.dlg@40tude.net> <m4qdnYiC9pPVSY3MnZ2dnUVZ8jSdnZ2d@bt.com> |
On 2/5/2013 1:43 AM, lipska the kat wrote:
> OK, I know I'm probably still being ignored because I've upset some
> people but can someone please explain to me exactly what a 'static
> class' is (WRT Java of course)
Part of the reason I'm generally ignoring your posts is that you don't
look obvious stuff up with Google. If you had said "I searched for
'static Java class' but didn't really understand the results," that
would a bit different. But at least trying to look stuff up is pretty
basic.
That said, I think people are using the term loosely and expecting the
reader to fill in the gaps. A real static class is a nested class that
has no (implied) reference to its enclosing instance.
<http://docs.oracle.com/javase/tutorial/java/javaOO/nested.html>
What's being referred to up-thread is just a class with all static
methods which also has no public constructor. (I think, I'm not really
reading this discussion closely.) It's a standard pattern in Java which
is used to make "utility classes." c.f. java.lang.Math, which does
exactly this.
The standard pattern is:
public class UsefulUtils {
private UsefulUtils() {}
... public static methods here
}
This class is effectively final because without a public ctor it cannot
be extended. If this class is stateless or has no mutable state, then
it is also thread safe, absent some other use of globals.
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Design Patterns dougmmika@gmail.com - 2013-02-02 16:17 -0800
Re: Design Patterns Arne Vajhøj <arne@vajhoej.dk> - 2013-02-02 19:39 -0500
Re: Design Patterns Marcel Müller <news.5.maazl@spamgourmet.org> - 2013-02-03 18:52 +0100
Re: Design Patterns Lew <lewbloch@gmail.com> - 2013-02-03 14:23 -0800
Re: Design Patterns Arne Vajhøj <arne@vajhoej.dk> - 2013-02-08 23:57 -0500
Re: Design Patterns Lew <lewbloch@gmail.com> - 2013-02-09 11:10 -0800
Re: Design Patterns Arne Vajhøj <arne@vajhoej.dk> - 2013-02-09 19:36 -0500
Re: Design Patterns Lew <lewbloch@gmail.com> - 2013-02-09 23:44 -0800
Re: Design Patterns Lew <lewbloch@gmail.com> - 2013-02-09 23:47 -0800
Re: Design Patterns "John B. Matthews" <nospam@nospam.invalid> - 2013-02-10 12:28 -0500
Re: Design Patterns Arne Vajhøj <arne@vajhoej.dk> - 2013-02-10 13:35 -0500
Re: Design Patterns Arne Vajhøj <arne@vajhoej.dk> - 2013-02-10 13:36 -0500
Re: Design Patterns Lew <lewbloch@gmail.com> - 2013-02-10 23:12 -0800
Re: Design Patterns "John B. Matthews" <nospam@nospam.invalid> - 2013-02-09 19:45 -0500
Re: Design Patterns Arne Vajhøj <arne@vajhoej.dk> - 2013-02-02 20:17 -0500
Re: Design Patterns Doug Mika <dougmmika@gmail.com> - 2013-02-02 19:43 -0800
Re: Design Patterns markspace <markspace@nospam.nospam> - 2013-02-02 20:54 -0800
Re: Design Patterns Doug Mika <dougmmika@gmail.com> - 2013-02-02 21:11 -0800
Re: Design Patterns markspace <markspace@nospam.nospam> - 2013-02-03 08:24 -0800
Re: Design Patterns Arne Vajhøj <arne@vajhoej.dk> - 2013-02-08 23:41 -0500
Re: Design Patterns Lew <lewbloch@gmail.com> - 2013-02-02 21:57 -0800
Re: Design Patterns Roedy Green <see_website@mindprod.com.invalid> - 2013-02-03 06:38 -0800
Re: Design Patterns Joerg Meier <joergmmeier@arcor.de> - 2013-02-04 17:06 +0100
Re: Design Patterns Lew <lewbloch@gmail.com> - 2013-02-04 12:38 -0800
Re: Design Patterns Arne Vajhøj <arne@vajhoej.dk> - 2013-02-04 21:31 -0500
Re: Design Patterns Peter Duniho <NpOeStPeAdM@NnOwSlPiAnMk.com> - 2013-02-04 21:03 -0800
Re: Design Patterns Lew <lewbloch@gmail.com> - 2013-02-04 21:25 -0800
Re: Design Patterns Arne Vajhøj <arne@vajhoej.dk> - 2013-02-05 19:54 -0500
Re: Design Patterns Lew <lewbloch@gmail.com> - 2013-02-05 17:51 -0800
Re: Design Patterns Arne Vajhøj <arne@vajhoej.dk> - 2013-02-05 20:54 -0500
Re: Design Patterns lipska the kat <"nospam at neversurrender dot co dot uk"> - 2013-02-05 09:43 +0000
Re: Design Patterns Lew <lewbloch@gmail.com> - 2013-02-05 13:03 -0800
Re: Design Patterns Arne Vajhøj <arne@vajhoej.dk> - 2013-02-05 20:09 -0500
Re: Design Patterns markspace <markspace@nospam.nospam> - 2013-02-05 13:56 -0800
Re: Design Patterns markspace <markspace@nospam.nospam> - 2013-02-05 14:30 -0800
Re: Design Patterns Peter Duniho <NpOeStPeAdM@NnOwSlPiAnMk.com> - 2013-02-05 14:33 -0800
Re: Design Patterns lipska the kat <"nospam at neversurrender dot co dot uk"> - 2013-02-06 09:03 +0000
Re: Design Patterns Arne Vajhøj <arne@vajhoej.dk> - 2013-02-05 20:07 -0500
Re: Design Patterns Eric Sosman <esosman@comcast-dot-net.invalid> - 2013-02-05 09:10 -0500
Re: Design Patterns Eric Sosman <esosman@comcast-dot-net.invalid> - 2013-02-05 13:20 -0500
Re: Design Patterns Lew <lewbloch@gmail.com> - 2013-02-05 13:10 -0800
Re: Design Patterns Arne Vajhøj <arne@vajhoej.dk> - 2013-02-05 20:11 -0500
Re: Design Patterns Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2013-02-05 09:53 -0800
Re: Design Patterns Arved Sandstrom <asandstrom2@eastlink.ca> - 2013-02-05 20:17 -0400
Re: Design Patterns Arne Vajhøj <arne@vajhoej.dk> - 2013-02-05 19:50 -0500
Re: Design Patterns Arne Vajhøj <arne@vajhoej.dk> - 2013-02-05 20:34 -0500
Re: Design Patterns Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2013-02-06 08:40 -0800
Re: Design Patterns Arne Vajhøj <arne@vajhoej.dk> - 2013-02-08 23:38 -0500
Re: Design Patterns Arne Vajhøj <arne@vajhoej.dk> - 2013-02-04 21:41 -0500
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