element
Class Circle

java.lang.Object
  |
  +--element.Rect
        |
        +--element.Oval
              |
              +--element.Circle

public class Circle

extends Oval

Copyright (c) 1997 McGraw-Hill All Rights Reserved.

Permission to use, copy, modify, and distribute this software and its documentation for NON-COMMERCIAL purposes and without fee is hereby granted provided that this copyright notice appears in all copies. Please refer to the file "copyright.html" for further important copyright and licensing information.

MCGRAW-HILL MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. MCGRAW-HILL SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.

Fields inherited from class element.Rect

height, left, top, width

Constructor Summary

Circle()
post: constructs a trivial circle at origin

Circle(Drawable d)
post: constructs a Circle from a drawable

Circle(int x, int y, int r)
pre: r >= 0
post: constructs circle with center at (x,y), radius r

Circle(Pt p, int r)
pre: r >= 0 post: constructs circle with center p, radius r

Method Summary

void	clearOn(DrawingWindow d) Erase oval from the drawing window d.
java.lang.Object	clone() post: returns a distinct copy of the Object
boolean	contains(Pt p) post: return true iff point p is within this circle
void	drawOn(DrawingWindow d) Draw (in the current mode) the oval on the drawing window
boolean	equals(java.lang.Object other) post: returns true if two rects are equal
void	fillOn(DrawingWindow d) Draw a filled oval (in the current mode) on drawing window d.
int	hashCode() post: returns suitable hash code
int	radius() post: returns radius of circle
void	radius(int r) pre: r >= 0 post: sets radius of the circle
java.lang.String	toString() post: returns a string representation of Object

Methods inherited from class element.Rect

bottom, bottom, center, center, extend, height, height, left, left, move, moveTo, moveTo, Rectangle, right, right, top, top, width, width

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

Circle

public Circle()

post: constructs a trivial circle at origin

Circle

public Circle(Drawable d)

post: constructs a Circle from a drawable

Parameters:

r -

Circle

public Circle(int x,
              int y,
              int r)

pre: r >= 0
post: constructs circle with center at (x,y), radius r

Parameters:

x -

y -

r -

Circle

public Circle(Pt p,
              int r)

pre: r >= 0 post: constructs circle with center p, radius r

Parameters:

p -

r -

Method Detail

contains

public boolean contains(Pt p)

post: return true iff point p is within this circle

Overrides:

contains in class Oval

Parameters:

p - a point possibly within a circle

Returns:

true iff p is within circle

radius

public int radius()

post: returns radius of circle

Returns:

radius of circle

radius

public void radius(int r)

pre: r >= 0
post: sets radius of the circle

Parameters:

r - new circle radius

fillOn

public void fillOn(DrawingWindow d)

Description copied from class: Oval

Draw a filled oval (in the current mode) on drawing window d.

Overrides:

fillOn in class Oval

Parameters:

d -

clearOn

public void clearOn(DrawingWindow d)

Description copied from class: Oval

Erase oval from the drawing window d.

Overrides:

clearOn in class Oval

Parameters:

d -

drawOn

public void drawOn(DrawingWindow d)

Description copied from class: Oval

Draw (in the current mode) the oval on the drawing window

Overrides:

drawOn in class Oval

Parameters:

d -

hashCode

public int hashCode()

post: returns suitable hash code

Overrides:

hashCode in class Oval

Returns:

equals

public boolean equals(java.lang.Object other)

post: returns true if two rects are equal

Overrides:

equals in class Oval

Parameters:

other -

Returns:

clone

public java.lang.Object clone()

post: returns a distinct copy of the Object

Overrides:

clone in class Oval

Returns:

toString

public java.lang.String toString()

post: returns a string representation of Object

Overrides:

toString in class Oval

Returns: