SpaceInvaders
Class Star

java.lang.Object
  |
  +--SpaceInvaders.Point
        |
        +--SpaceInvaders.Pixel
              |
              +--SpaceInvaders.Star

public class Star

extends Pixel

Encapsulates star behavior.

Version:

1.1, 10 November 2001

Author:

Susan B. Cavanaugh

Field Summary

private Point

prevPos previous screen position

Fields inherited from class SpaceInvaders.Pixel

c

Fields inherited from class SpaceInvaders.Point

x, y

Constructor Summary

Star(Point p, java.awt.Color c)
Accepts a star's screen position and color.

Method Summary

void	draw(java.awt.Graphics g) Draws the star on the screen.
int	getX() Gets x coordinate.
int	getY() Gets y coordinate.
void	move() Advances star straight downward 1 pixel per move, restarting the screen position to the top of the screen when the star moves off the bottom of the screen.

Methods inherited from class SpaceInvaders.Pixel

getColor, setColor

Methods inherited from class SpaceInvaders.Point

setX, setXY, setY

Methods inherited from class java.lang.Object

, clone, equals, finalize, getClass, hashCode, notify, notifyAll, registerNatives, toString, wait, wait, wait

Field Detail

prevPos

private Point prevPos

previous screen position

Constructor Detail

Star

public Star(Point p,
            java.awt.Color c)

Accepts a star's screen position and color.

Parameters:

p - screen position

c - the RGB color

Method Detail

getX

public int getX()

Gets x coordinate.

Overrides:

getX in class Point

Returns:

x coordinate of screen position.

getY

public int getY()

Gets y coordinate.

Overrides:

getY in class Point

Returns:

y coordinate of screen position.

draw

public void draw(java.awt.Graphics g)

Draws the star on the screen.

Parameters:

g - Graphics context to draw in.

move

public void move()

Advances star straight downward 1 pixel per move, restarting the screen position to the top of the screen when the star moves off the bottom of the screen.