org.jscience.computing.game.tictactoe
Class TickTackToe

java.lang.Object
  org.jscience.computing.game.AbstractGame
      org.jscience.computing.game.tictactoe.TickTackToe

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, GamePlay

public class TickTackToe
extends AbstractGame

This class implements the game TickTackToe. The board positions are represented as follows:

0 1 23 4 56 7 8

See Also:

Serialized Form

Constructor Summary

TickTackToe()
Creates a new TickTackToe object.

TickTackToe(java.lang.String name)
Creates a new TickTackToe object.

Method Summary

java.lang.Object	clone() making sure that the internal non-primitive board representation is properly cloned to allow the deep-copy required for spawnChild()
boolean	equals(java.lang.Object obj) required to allow recognizing the same game status even after serialization (to support network games, GameBooks, etc.).
int[]	getWinner() getWinner() is checking for a triple (three-in-a-row).
int	hashCode() It's just some number derived from a portion of the board; not guaranteed to be unique for every game, but guaranteed to always be the same for the same board.
protected GameMove[]	listLegalMoves() DOCUMENT ME!
int	nextPlayer() DOCUMENT ME!
protected boolean	popMove() DOCUMENT ME!
protected boolean	pushMove(GameMove move) DOCUMENT ME!
java.lang.String	toString() DOCUMENT ME!

Methods inherited from class org.jscience.computing.game.AbstractGame

clearRedoList, gameOver, getGameName, getLastMove, getLastPlayer, getLegalMoves, getLegalMoves, getMoveHistory, getNumberOfRedoMoves, getRedoList, getResult, isLegalMove, isWinner, loadFromFile, makeMove, numberOfMoves, numberOfPlayers, redoMove, resetLegalMoves, resetLists, saveToFile, spawnChild, undoLastMove, undoMoves

Methods inherited from class java.lang.Object

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

Constructor Detail

TickTackToe

public TickTackToe()

Creates a new TickTackToe object.

TickTackToe

public TickTackToe(java.lang.String name)

Creates a new TickTackToe object.

Parameters:

name - DOCUMENT ME!

Method Detail

nextPlayer

public int nextPlayer()

DOCUMENT ME!

Returns:

DOCUMENT ME!

getWinner

public int[] getWinner()

getWinner() is checking for a triple (three-in-a-row). If found, it returns an array with the player role that has the triple. If the board is full (after 9 moves) and no triple is found, an empty array is returned to represent a draw (i.e. no winner). Otherwise, null is returned (when the game is still in progress).

Returns:

DOCUMENT ME!

listLegalMoves

protected GameMove[] listLegalMoves()

DOCUMENT ME!

Specified by:

listLegalMoves in class AbstractGame

Returns:

DOCUMENT ME!

pushMove

protected boolean pushMove(GameMove move)

DOCUMENT ME!

Specified by:

pushMove in class AbstractGame

Parameters:

move - DOCUMENT ME!

Returns:

DOCUMENT ME!

popMove

protected boolean popMove()

DOCUMENT ME!

Specified by:

popMove in class AbstractGame

Returns:

DOCUMENT ME!

toString

public java.lang.String toString()

DOCUMENT ME!

Overrides:

toString in class AbstractGame

Returns:

DOCUMENT ME!

clone

public java.lang.Object clone()
                       throws java.lang.CloneNotSupportedException

making sure that the internal non-primitive board representation is properly cloned to allow the deep-copy required for spawnChild()

Specified by:

clone in interface GamePlay

Overrides:

clone in class AbstractGame

Returns:

DOCUMENT ME!

Throws:

java.lang.CloneNotSupportedException - DOCUMENT ME!

See Also:

AbstractGame.spawnChild(GameMove)

hashCode

public int hashCode()

It's just some number derived from a portion of the board; not guaranteed to be unique for every game, but guaranteed to always be the same for the same board. (trading off performance vs. effectiveness - not really an issue for TickTackToe, but just to make a point ..)

Overrides:

hashCode in class java.lang.Object

Returns:

DOCUMENT ME!

equals

public boolean equals(java.lang.Object obj)

required to allow recognizing the same game status even after serialization (to support network games, GameBooks, etc.). A call to super.equals() is not needed here, as we only care about the board status and not the move history or anything else where the AbstractGame may differ.

Overrides:

equals in class java.lang.Object

Parameters:

obj - DOCUMENT ME!

Returns:

DOCUMENT ME!