/**
* Determines whether or not two points are equal. Two instances of <code>Point2D</code> are equal
* if the values of their <code>x</code> and <code>y</code> member fields, representing their
* position in the coordinate space, are the same.
*
* @param obj an object to be compared with this <code>Point2D</code>
* @return <code>true</code> if the object to be compared is an instance of <code>Point2D</code>
* and has the same values; <code>false</code> otherwise.
* @since 1.2
*/
public boolean equals(Object obj) {
if (obj instanceof Point2D) {
Point2D p2d = (Point2D) obj;
return (getX() == p2d.getX()) && (getY() == p2d.getY());
}
return super.equals(obj);
}
/**
* Returns the distance from this <code>Point2D</code> to a specified <code>Point2D</code>.
*
* @param pt the specified point to be measured against this <code>Point2D</code>
* @return the distance between this <code>Point2D</code> and the specified <code>Point2D</code>.
* @since 1.2
*/
public double distance(Point2D pt) {
double px = pt.getX() - this.getX();
double py = pt.getY() - this.getY();
return Math.sqrt(px * px + py * py);
}
/**
* Sets the location of this <code>Point2D</code> to the same coordinates as the specified <code>
* Point2D</code> object.
*
* @param p the specified <code>Point2D</code> to which to set this <code>Point2D</code>
* @since 1.2
*/
public void setLocation(Point2D p) {
setLocation(p.getX(), p.getY());
}