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Re: Programming question determining two circle's relation

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Here is the correct answer.


public class Circle2D {
	private double x;
	private double y;
	private double radius;

	public Circle2D() {
		x = 0;
		y = 0;
		radius = 1;
	}

	public Circle2D(double x, double y, double radius) {
		this.x = x;
		this.y = y;
		this.radius = radius;
	}

	public double getX() {
		return x;
	}

	public double getY() {
		return y;
	}

	public double getArea() {
		return radius * radius * Math.PI;
	}

	public double getPerimeter() {
		return 2 * radius * Math.PI;
	}

	public boolean contains(double x, double y) {
		double distance = Math.pow(getX() - x, 2.0) + Math.pow(getY() - y,
2.0);
		if (distance <= Math.pow(radius, 2.0))
			return true;
		else
			return false;
	}

	public boolean contains(Circle2D circle) {
		double distance = Math.pow(circle.x - getX(), 2.0) +
Math.pow(circle.y - getY(), 2.0);
		if (distance <= (Math.pow(radius, 2.0) - Math.pow(circle.radius,
2.0)))
			return true;
		else
			return false;

	}

	public boolean overlaps(Circle2D circle) {
		double distance = Math.pow(circle.x - getX(), 2.0) +
Math.pow(circle.y - getY(), 2.0);
		if (distance < Math.abs(Math.pow(radius, 2.0) -
Math.pow(circle.radius, 2.0)))
			return true;

		else
			return false;
	}
}

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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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