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Groups > comp.lang.java.programmer > #8305

Re: borrowing Constants

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On 9/23/11 6:39 PM, Roedy Green wrote:
> On Fri, 23 Sep 2011 22:10:28 -0300, Arved Sandstrom
> <asandstrom3minus1@eastlink.ca>  wrote, quoted or indirectly quoted
> someone who said :
>
>> Which logical place is not in the code at all. Granted, I don't know
>> that Roedy's example is doing anything more than using "VERSION" as a
>> generic variable name (I hope).
>
> I chose it as an easy-to-understand example.  In my example, VERSION
> is something you might display in a an About box.
>
> The question is really about accidentally dragging in some giant class
> when you had no intention of using its code.

If you are using a field from it, you *are* using its code.

Imagine the following scenario:

public class MyConstants {
    public static final String VERSION;
    public static final int ZERO;
    static {
	 ZERO = 0;
          VERSION = SomeOtherClass.calculateVersionNumber();
    }
}

public class UsesOtherClass {
    public static final VERSION = MyConstants.VERSION;
}

When UsesOtherClass is initialized, it requires MyConstants *and* 
SomeOtherClass to be initialized.

In general, if you use some code, you are transiently using its 
dependencies as well.

Although, I thought I read somewhere that constants can sometimes be 
inlined (which can lead to other surprising behaviors if you recompile 
only some of your classes on make).

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borrowing Constants Roedy Green <see_website@mindprod.com.invalid> - 2011-09-23 17:40 -0700
  Re: borrowing Constants Arne Vajhøj <arne@vajhoej.dk> - 2011-09-23 20:44 -0400
    Re: borrowing Constants Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2011-09-23 22:10 -0300
      Re: borrowing Constants Roedy Green <see_website@mindprod.com.invalid> - 2011-09-23 18:39 -0700
        Re: borrowing Constants Arne Vajhøj <arne@vajhoej.dk> - 2011-09-23 22:17 -0400
        Re: borrowing Constants Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2011-09-25 11:25 -0700
          Re: borrowing Constants Lew <lewbloch@gmail.com> - 2011-09-25 11:36 -0700
      Re: borrowing Constants Arne Vajhøj <arne@vajhoej.dk> - 2011-09-23 22:30 -0400
  Re: borrowing Constants Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-09-23 21:15 -0400
    Re: borrowing Constants Roedy Green <see_website@mindprod.com.invalid> - 2011-09-23 18:43 -0700
  Re: borrowing Constants markspace <-@.> - 2011-09-23 18:44 -0700
    Re: borrowing Constants Lew <lewbloch@gmail.com> - 2011-09-23 19:19 -0700
    Re: borrowing Constants Arne Vajhøj <arne@vajhoej.dk> - 2011-09-23 22:32 -0400
  Re: borrowing Constants Lew <lewbloch@gmail.com> - 2011-09-23 19:11 -0700
    Re: borrowing Constants Lew <lewbloch@gmail.com> - 2011-09-23 19:26 -0700
  Re: borrowing Constants v_borchert@despammed.com (Volker Borchert) - 2011-09-24 09:44 +0000
  Re: borrowing Constants Roedy Green <see_website@mindprod.com.invalid> - 2011-09-24 15:38 -0700
  Re: borrowing Constants Roedy Green <see_website@mindprod.com.invalid> - 2011-09-24 17:09 -0700
    Re: borrowing Constants Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-09-24 20:14 -0400
    Re: borrowing Constants markspace <-@.> - 2011-09-24 18:18 -0700
      Re: borrowing Constants Arne Vajhøj <arne@vajhoej.dk> - 2011-09-25 22:36 -0400
    Re: borrowing Constants Arne Vajhøj <arne@vajhoej.dk> - 2011-09-25 22:35 -0400
  Re: borrowing Constants Daniele Futtorovic <da.futt.news@laposte-dot-net.invalid> - 2011-09-26 01:22 +0200

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