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From: byhesed <byhesed@gmail.com>
Newsgroups: comp.lang.java.programmer
Subject: Re: Programming question determining two circle's relation
Date: Sat, 30 Apr 2011 02:50:34 -0700 (PDT)
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On 4=BF=F930=C0=CF, =BF=C0=C8=C46=BD=C308=BA=D0, Patricia Shanahan <p...@ac=
m.org> wrote:
> On 4/30/2011 1:33 AM, byhesed wrote:
> ...> - double distance =3D 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 =3D Math.pow(getX() - x, 2.0) + Math.pow(get=
Y() - y,
> > 2.0);
> >            if (distance<=3D 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.