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Re: Programming question determining two circle's relation

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On 4월30일, 오후6시08분, Patricia Shanahan <p...@acm.org> wrote:
> On 4/30/2011 1:33 AM, byhesed wrote:
> ...> - double distance = Math.sqrt(Math.pow(circle.x - getX(), 2.0) +
> > Math.pow(circle.y - getY(), 2.0));
> ...
> >    public boolean contains(double x, double y) {
> >            double distance = Math.pow(getX() - x, 2.0) + Math.pow(getY() - y,
> > 2.0);
> >            if (distance<= radius)
> >                    return true;
> >            else
> >                    return false;
> >    }
>
> ...
>
> I suggest comparing the distance calculation you actually use in the
> contains(double x, double y) method to the distance calculation you
> described.
>
> If you have a calculation you need to do a lot, why not write and test a
> separate method to do it, rather than writing the calculation in-line
> repeatedly?
>
> What is the contains(Circle2D circle) method supposed to return if
> circle contains this?
> Patricia

I know the source code I had posted is silly.
I do not perform any optimization because it is just an example.
It is an exercise from a Java book, Introduction to Java Programming 8/
e.
The reason I don't add a separate method is the author suggests not
adding any other data fields and methods.

Anyway, thank you for your advice.

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Programming question determining two circle's relation byhesed <byhesed@gmail.com> - 2011-04-30 01:33 -0700
  Re: Programming question determining two circle's relation byhesed <byhesed@gmail.com> - 2011-04-30 01:59 -0700
    Re: Programming question determining two circle's relation "Gavino" <invalid@invalid.invalid> - 2011-04-30 17:51 +0200
      Re: Programming question determining two circle's relation byhesed <byhesed@gmail.com> - 2011-04-30 09:01 -0700
        Re: Programming question determining two circle's relation "Gavino" <invalid@invalid.invalid> - 2011-04-30 18:33 +0200
    Re: Programming question determining two circle's relation byhesed <byhesed@gmail.com> - 2011-04-30 02:03 -0700
  Re: Programming question determining two circle's relation byhesed <byhesed@gmail.com> - 2011-04-30 02:50 -0700
    Re: Programming question determining two circle's relation byhesed <byhesed@gmail.com> - 2011-04-30 08:42 -0700
      Re: Programming question determining two circle's relation "Gavino" <invalid@invalid.invalid> - 2011-04-30 17:59 +0200
    Re: Programming question determining two circle's relation "John B. Matthews" <nospam@nospam.invalid> - 2011-04-30 17:25 -0400
      Re: Programming question determining two circle's relation Patricia Shanahan <pats@acm.org> - 2011-04-30 17:03 -0700
        Re: Programming question determining two circle's relation "John B. Matthews" <nospam@nospam.invalid> - 2011-05-01 03:10 -0400
  Re: Programming question determining two circle's relation Patricia Shanahan <pats@acm.org> - 2011-04-30 02:08 -0700
  Re: Programming question determining two circle's relation Roedy Green <see_website@mindprod.com.invalid> - 2011-04-30 11:49 -0700

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