com.collegeboard.gridworld.actor
Class SimpleCritter

java.lang.Object
  com.collegeboard.gridworld.actor.Actor
      com.collegeboard.gridworld.actor.AbstractCritter
          com.collegeboard.gridworld.actor.SimpleCritter

public class SimpleCritter
extends AbstractCritter

A simple critter is a critter with basic implementations of the abstract methods of Critter. It does nothing to its neighbors and then moves to a random empty neighboring location.

copyright© 2005 Cay S. Horstmann (http://horstmann.com)

Author:

Cay Horstmann

Constructor Summary

SimpleCritter()

Method Summary

ArrayList<Location>	getMoveLocations() Get the possible locations for the next move.
ArrayList<Actor>	getNeighbors() Get the neighbors for processing.
void	makeMove(Location loc) Moves this critter to the given location.
void	processNeighbors(ArrayList<Actor> neighbors) Process the critter's neighbors.
Location	selectMoveLocation(ArrayList<Location> locs) Selects the location for the next move.

Methods inherited from class com.collegeboard.gridworld.actor.AbstractCritter

act

Methods inherited from class com.collegeboard.gridworld.actor.Actor

getColor, getDirection, getGrid, getLocation, moveTo, putSelfInGrid, removeSelfFromGrid, setColor, setDirection, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

SimpleCritter

public SimpleCritter()

Method Detail

getNeighbors

public ArrayList<Actor> getNeighbors()

Description copied from class: AbstractCritter

Get the neighbors for processing. Implemented to return the actors that occupy neighboring grid locations. Override this method for subclasses that look elsewhere for neighbors.

Specified by:

getNeighbors in class AbstractCritter

Returns:

a list of actors that are neighbors of this critter

processNeighbors

public void processNeighbors(ArrayList<Actor> neighbors)

Description copied from class: AbstractCritter

Process the critter's neighbors. This method is implemented to do nothing. Override it in subclasses that process neighbors, for example by examining or removing them.

Specified by:

processNeighbors in class AbstractCritter

Parameters:

neighbors - the neighbors to be processed

getMoveLocations

public ArrayList<Location> getMoveLocations()

Description copied from class: AbstractCritter

Get the possible locations for the next move. Implemented to return the empty neighboring locations. Override this method for subclasses that look elsewhere for move locations.

Specified by:

getMoveLocations in class AbstractCritter

Returns:

a list of possible locations for the next move

selectMoveLocation

public Location selectMoveLocation(ArrayList<Location> locs)

Description copied from class: AbstractCritter

Selects the location for the next move. Implemented to randomly pick one of the possible locations, or to return the current location if locs has size 0. Override this method for subclasses that have another mechanism for selecting the next move location.

Specified by:

selectMoveLocation in class AbstractCritter

Parameters:

locs - the possible locations for the next move

Returns:

the location that was selected for the next move.

makeMove

public void makeMove(Location loc)

Description copied from class: AbstractCritter

Moves this critter to the given location. Implemented to call moveTo. Override this method for subclasses that want to carry out other actions for moving (for example, turning or leaving traces).

Specified by:

makeMove in class AbstractCritter

Parameters:

loc - the location to move to (must be valid)