Package Piece

Class Piece

java.lang.Object

Piece.Piece

Direct Known Subclasses:

Bishop, King, Knight, Pawn, Queen, Rook

public abstract class Piece
extends Object

Represents an abstract chess piece, providing shared functionality for all specific piece types.

This class defines common fields and methods used by all chess pieces, such as position, sprite rendering, movement status, and access to the associated Board. Subclasses are expected to implement their own movement validation logic via isValidMove(int, int, Board).

See Also:

• Board
• PieceColor

Field Summary

Fields

Modifier and Type	Field	Description
int	col	The column and row position of the piece on the board.
protected PieceColor	color	The color of the piece (white or black).
String	name	The name of the piece (e.g., "Bishop", "Knight").
int	row	The column and row position of the piece on the board.
int	sTScale	The width and height of a single piece graphic within the sprite sheet.
int	xpos	The on-screen pixel coordinates used for rendering.
int	ypos	The on-screen pixel coordinates used for rendering.

Constructor Summary

Constructors

Constructor	Description
Piece(Board board)	Constructs a chess piece and associates it with the specified board.

Method Summary

Modifier and Type	Method	Description
PieceColor	getColor()	Returns the color of the piece (white or black).
abstract boolean	isValidMove(int toCol, int toRow, Board board)	Determines whether a move to the specified destination is valid for this piece.
void	paint(Graphics2D g2)	Draws the piece sprite on the screen at its current pixel position.
boolean	readMadeMove()	Returns whether the piece has previously moved.
void	switchMadeMove()	Sets the madeMove flag to true, indicating the piece has moved at least once.

Methods inherited from class java.lang.Object

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

Field Details

col

public int col

The column and row position of the piece on the board.

row

public int row

The column and row position of the piece on the board.

xpos

public int xpos

The on-screen pixel coordinates used for rendering.

ypos

public int ypos

The on-screen pixel coordinates used for rendering.

color

protected PieceColor color

The color of the piece (white or black).

name

public String name

The name of the piece (e.g., "Bishop", "Knight").

sTScale

public int sTScale

The width and height of a single piece graphic within the sprite sheet.

Constructor Details

Piece

public Piece(Board board)

Constructs a chess piece and associates it with the specified board.

Parameters:

board - the chess board this piece belongs to

Method Details

paint

public void paint(Graphics2D g2)

Draws the piece sprite on the screen at its current pixel position.

Parameters:

g2 - the graphics context used to render the piece

getColor

public PieceColor getColor()

Returns the color of the piece (white or black).

Returns:

the color of this piece

switchMadeMove

public void switchMadeMove()

Sets the madeMove flag to true, indicating the piece has moved at least once.

readMadeMove

public boolean readMadeMove()

Returns whether the piece has previously moved.

Returns:

true if the piece has moved; false otherwise

isValidMove

public abstract boolean isValidMove(int toCol,
 int toRow,
 Board board)

Determines whether a move to the specified destination is valid for this piece.

This method must be implemented by subclasses such as Bishop, Rook, etc., and defines the Piece subclass movement logic.

Parameters:

toCol - the destination column

toRow - the destination row

board - the board on which the move is evaluated

Returns:

true if the move is valid; false otherwise