Package Game

Class Board

java.lang.Object

java.awt.Component

java.awt.Container

javax.swing.JComponent

javax.swing.JPanel

Game.Board

All Implemented Interfaces:

ImageObserver, MenuContainer, Serializable, Accessible

public class Board
extends JPanel

Manages the chess board, including piece placement, captures, movement validation, and repainting of piece images.

This class manages all 64 squares of the chess game board. It initializes pieces in their correct starting positions, handles captures of opposing pieces, validates movement logic, and repaints piece images after every valid move.

See Also:

• Piece
• Move
• Input
• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class javax.swing.JPanel

JPanel.AccessibleJPanel

Nested classes/interfaces inherited from class javax.swing.JComponent

JComponent.AccessibleJComponent

Nested classes/interfaces inherited from class java.awt.Container

Container.AccessibleAWTContainer

Nested classes/interfaces inherited from class java.awt.Component

Component.AccessibleAWTComponent, Component.BaselineResizeBehavior, Component.BltBufferStrategy, Component.FlipBufferStrategy

Field Summary

Fields

Modifier and Type	Field	Description
Input	in	Handles mouse input events and piece interaction.
Piece	selPiece	The piece currently selected by the player.
int	ts	The size (in pixels) of each tile on the board.

Fields inherited from class javax.swing.JComponent

listenerList, TOOL_TIP_TEXT_KEY, ui, UNDEFINED_CONDITION, WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, WHEN_FOCUSED, WHEN_IN_FOCUSED_WINDOW

Fields inherited from class java.awt.Component

accessibleContext, BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT

Fields inherited from interface java.awt.image.ImageObserver

ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH

Constructor Summary

Constructors

Constructor	Description
Board()	Constructs the chess board and prepares it for user interaction.

Method Summary

Modifier and Type	Method	Description
void	addPieces()	Adds all chess pieces to their standard starting positions on the board.
void	capture(Move move)	Captures an opposing piece and performs special chess logic such as promotion or game end.
Piece	getPiece(int col, int row)	Retrieve the chess piece located at the specified column and row.
void	makeMove(Move move)	Executes a player's move if it is valid; otherwise resets the piece's position.
void	paintComponent(Graphics g)	Renders the chess board and all active pieces.
void	setInfoArea(JTextArea infoArea)	Connects the chess board with the specified JTextArea.
boolean	validMove(Move move)	Validates whether a player's move is legal based on turn order and piece rules.

Methods inherited from class javax.swing.JPanel

getAccessibleContext, getUI, getUIClassID, paramString, setUI, updateUI

Methods inherited from class javax.swing.JComponent

addAncestorListener, addNotify, addVetoableChangeListener, computeVisibleRect, contains, createToolTip, disable, enable, firePropertyChange, firePropertyChange, firePropertyChange, fireVetoableChange, getActionForKeyStroke, getActionMap, getAlignmentX, getAlignmentY, getAncestorListeners, getAutoscrolls, getBaseline, getBaselineResizeBehavior, getBorder, getBounds, getClientProperty, getComponentGraphics, getComponentPopupMenu, getConditionForKeyStroke, getDebugGraphicsOptions, getDefaultLocale, getFontMetrics, getGraphics, getHeight, getInheritsPopupMenu, getInputMap, getInputMap, getInputVerifier, getInsets, getInsets, getListeners, getLocation, getMaximumSize, getMinimumSize, getNextFocusableComponent, getPopupLocation, getPreferredSize, getRegisteredKeyStrokes, getRootPane, getSize, getToolTipLocation, getToolTipText, getToolTipText, getTopLevelAncestor, getTransferHandler, getVerifyInputWhenFocusTarget, getVetoableChangeListeners, getVisibleRect, getWidth, getX, getY, grabFocus, hide, isDoubleBuffered, isLightweightComponent, isManagingFocus, isOpaque, isOptimizedDrawingEnabled, isPaintingForPrint, isPaintingOrigin, isPaintingTile, isRequestFocusEnabled, isValidateRoot, paint, paintBorder, paintChildren, paintImmediately, paintImmediately, print, printAll, printBorder, printChildren, printComponent, processComponentKeyEvent, processKeyBinding, processKeyEvent, processMouseEvent, processMouseMotionEvent, putClientProperty, registerKeyboardAction, registerKeyboardAction, removeAncestorListener, removeNotify, removeVetoableChangeListener, repaint, repaint, requestDefaultFocus, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, resetKeyboardActions, reshape, revalidate, scrollRectToVisible, setActionMap, setAlignmentX, setAlignmentY, setAutoscrolls, setBackground, setBorder, setComponentPopupMenu, setDebugGraphicsOptions, setDefaultLocale, setDoubleBuffered, setEnabled, setFocusTraversalKeys, setFont, setForeground, setInheritsPopupMenu, setInputMap, setInputVerifier, setMaximumSize, setMinimumSize, setNextFocusableComponent, setOpaque, setPreferredSize, setRequestFocusEnabled, setToolTipText, setTransferHandler, setUI, setVerifyInputWhenFocusTarget, setVisible, unregisterKeyboardAction, update

Methods inherited from class java.awt.Container

add, add, add, add, add, addContainerListener, addImpl, addPropertyChangeListener, addPropertyChangeListener, applyComponentOrientation, areFocusTraversalKeysSet, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getComponentZOrder, getContainerListeners, getFocusTraversalKeys, getFocusTraversalPolicy, getLayout, getMousePosition, insets, invalidate, isAncestorOf, isFocusCycleRoot, isFocusCycleRoot, isFocusTraversalPolicyProvider, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paintComponents, preferredSize, printComponents, processContainerEvent, processEvent, remove, remove, removeAll, removeContainerListener, setComponentZOrder, setFocusCycleRoot, setFocusTraversalPolicy, setFocusTraversalPolicyProvider, setLayout, transferFocusDownCycle, validate, validateTree

Methods inherited from class java.awt.Component

action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addMouseWheelListener, bounds, checkImage, checkImage, coalesceEvents, contains, createImage, createImage, createVolatileImage, createVolatileImage, disableEvents, dispatchEvent, enable, enableEvents, enableInputMethods, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, getBackground, getBounds, getColorModel, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeysEnabled, getFont, getForeground, getGraphicsConfiguration, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getLocale, getLocation, getLocationOnScreen, getMouseListeners, getMouseMotionListeners, getMousePosition, getMouseWheelListeners, getName, getParent, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getToolkit, getTreeLock, gotFocus, handleEvent, hasFocus, imageUpdate, inside, isBackgroundSet, isCursorSet, isDisplayable, isEnabled, isFocusable, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isMaximumSizeSet, isMinimumSizeSet, isPreferredSizeSet, isShowing, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, processComponentEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processMouseWheelEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, requestFocus, requestFocus, requestFocusInWindow, resize, resize, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setFocusable, setFocusTraversalKeysEnabled, setIgnoreRepaint, setLocale, setLocation, setLocation, setMixingCutoutShape, setName, setSize, setSize, show, show, size, toString, transferFocus, transferFocusBackward, transferFocusUpCycle

Methods inherited from class java.lang.Object

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

Field Details

ts

public int ts

The size (in pixels) of each tile on the board.

selPiece

public Piece selPiece

The piece currently selected by the player.

in

public Input in

Handles mouse input events and piece interaction.

Constructor Details

Board

public Board()

Constructs the chess board and prepares it for user interaction.

Sets the board's preferred size based on the number of rows and columns, then attaches mouse input listeners to handle click and drag events from the user.

See Also:

• for mouse handling logic

Method Details

addPieces

public void addPieces()

Adds all chess pieces to their standard starting positions on the board.

This method initializes and places all chess Piece subclasses into the internal piece list. It defines their initial row, column, and color. This prepares the board for the start of the game.

See Also:

• Knight
• Pawn
• Rook
• Bishop
• Queen
• King

setInfoArea

public void setInfoArea(JTextArea infoArea)

Connects the chess board with the specified JTextArea.

This method associates the given JTextArea to this Board, so it can be used to display game information or updates.

Parameters:

infoArea - the JTextArea info area

paintComponent

public void paintComponent(Graphics g)

Renders the chess board and all active pieces.

This method paints the checkered background of the 8x8 board and calls the paint() method of each active piece to draw them in their current positions.

Overrides:

paintComponent in class JComponent

Parameters:

g - the Graphics context used for drawing

getPiece

public Piece getPiece(int col,
 int row)

Retrieve the chess piece located at the specified column and row.

This method searches through the pieceList to find a piece that matches the given board coordinates. If no piece is found at the specified location, the method returns null.

Parameters:

col - the column of the desired piece (0-7)

row - the row of the desired piece (0-7)

Returns:

the chess Piece at the specified location, or null if none exists

makeMove

public void makeMove(Move move)

Executes a player's move if it is valid; otherwise resets the piece's position.

This method receives a Move object containing the piece's current position ("from") and target position ("to"). If the move is valid, the piece's board and screen coordinates are updated, a capture is performed if necessary, the turn is switched, and the infoArea is updated. If the move is invalid, the piece is reset to its original location.

Parameters:

move - the Move object containing coordinates for current piece location and destination location.

validMove

public boolean validMove(Move move)

Validates whether a player's move is legal based on turn order and piece rules.

This method retrieves the selected piece and the target square, checking if the move is allowed given the current player's turn. It returns false if the player attempts to move out of turn or capture their own piece. If those conditions pass, it defers to the piece’s own Piece.isValidMove(int, int, Board) method to validate subclass-specific movement logic.

Parameters:

move - the Move object containing coordinates for current piece location and destination location.

Returns:

true if the move is valid; false otherwise

capture

public void capture(Move move)

Captures an opposing piece and performs special chess logic such as promotion or game end.

This method checks if the move results in a capture, pawn promotion, or game-ending condition. If a Pawn reaches the opposite end of the board, it is promoted to a Queen. If a King is captured, the game ends and the winning team is printed to the terminal before exiting the program.

Parameters:

move - the Move object containing coordinates for current piece location and destination location.