Class FlyManager

java.lang.Object
  |
  +--FlyManager

public class FlyManager

extends java.lang.Object

CLASS: FlyManager
PURPOSE: This class is the monitor of where the flies are and to manage them
IMPORT: java.util.Vector, java.awt.Image, java.awt.Graphics, java.awt.image.ImageObserver, Fly
EXPORT: New Class|FlyManager
New Method| FlyManager, createFly, eatFly moveAllFly, paintAllFly

Field Summary

private java.util.Vector	flyList Keep track of the list of flies
private int	height height of the box where the fly is allow to go
private int	maxFly Maximum number of flies alive at any given time
private int	maxMovement how far the flies can move
private int	width width of the box where the fly is allow to go

Constructor Summary

FlyManager(int max, int w, int h)

PRE: NONE
POST: Save the configuration information

Method Summary

boolean	createFly() PRE: NONE POST: A fly is created if the maximum number of fly has not been reach yet
boolean	eatFly(int x, int y) PRE: NONE POST: Try to eat the fly, if fail return false, otherwise, return true and the fly will be removed
void	moveAllFly() PRE: NONE POST: move all the flies' position randomly
void	paintAllFly(java.awt.Graphics g, java.awt.Image flyImage, java.awt.image.ImageObserver appletRef) PRE: Valid instance of Graphics, Image, and ImageObserver POST: Paint all the flies available onto the Graphics object

Methods inherited from class java.lang.Object

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

Field Detail

flyList

private java.util.Vector flyList

Keep track of the list of flies

width

private int width

width of the box where the fly is allow to go

height

private int height

height of the box where the fly is allow to go

maxFly

private int maxFly

Maximum number of flies alive at any given time

maxMovement

private int maxMovement

how far the flies can move

Constructor Detail

FlyManager

public FlyManager(int max,
                  int w,
                  int h)

PRE: NONE
POST: Save the configuration information

Method Detail

createFly

public boolean createFly()

PRE: NONE
POST: A fly is created if the maximum number of fly has not been reach yet

eatFly

public boolean eatFly(int x,
                      int y)

PRE: NONE
POST: Try to eat the fly, if fail return false, otherwise, return true and the fly will be removed

paintAllFly

public void paintAllFly(java.awt.Graphics g,
                        java.awt.Image flyImage,
                        java.awt.image.ImageObserver appletRef)

PRE: Valid instance of Graphics, Image, and ImageObserver
POST: Paint all the flies available onto the Graphics object

moveAllFly

public void moveAllFly()

PRE: NONE
POST: move all the flies' position randomly