physics

Class Circle

java.lang.Object

physics.Circle

public final class Circle
extends java.lang.Object

Circle is an immutable abstract data type which models the mathematical notion of a circle in Cartesian space.

Constructor Summary

Constructors

Constructor and Description
Circle(double cx, double cy, double r) Creates a new circle with the specified size and location.
Circle(java.awt.geom.Point2D center, double r) Creates a new circle with the specified size and location.
Circle(Vect center, double r) Creates a new circle with the specified size and location.

Method Summary

Modifier and Type	Method and Description
boolean	equals(java.lang.Object o)
Vect	getCenter()
double	getRadius()
int	hashCode()
java.awt.geom.Ellipse2D	toEllipse2D()
java.lang.String	toString()

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

Circle

public Circle(Vect center,
              double r)

Creates a new circle with the specified size and location.

Parameters:

center - the center point of the circle; requires that center != null

r - the radius of the circle; requires that r >= 0

Circle

public Circle(double cx,
              double cy,
              double r)

Creates a new circle with the specified size and location.

Parameters:

cx - the x coordinate of the center point of the circle

cy - the y coordinate of the center point of the circle

r - the radius of the circle; requires that r >= 0

Circle

public Circle(java.awt.geom.Point2D center,
              double r)

Creates a new circle with the specified size and location.

Parameters:

center - the center point of the circle; requires that center != null

r - the radius of the circle; requires that r >= 0

Method Detail

getCenter

public Vect getCenter()

Returns:

the center point of this circle.

getRadius

public double getRadius()

Returns:

the radius of this circle.

toEllipse2D

public java.awt.geom.Ellipse2D toEllipse2D()

Returns:

a new Ellipse2D which is the same as this circle

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object