Class Snake

java.lang.Object

java.awt.Component

java.awt.Container

javax.swing.JComponent

javax.swing.JPanel

uno.anahata.asi.swing.games.Snake

All Implemented Interfaces:

ActionListener, ImageObserver, MenuContainer, Serializable, EventListener, Accessible

public class Snake
extends JPanel
implements ActionListener

A classic Snake game implementation with a Mapacho theme.

Features grid-based movement, randomized "cigar" spawning, and a score tracking system. Optimized for execution as a standalone easter egg from the support panel.

Author:

anahata

See Also:

• Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
class	Snake.MyKeyAdapter	Inner class for handling directional input.

Nested classes/interfaces inherited from class JPanel

JPanel.AccessibleJPanel

Nested classes/interfaces inherited from class JComponent

JComponent.AccessibleJComponent

Nested classes/interfaces inherited from class Container

Container.AccessibleAWTContainer

Nested classes/interfaces inherited from class Component

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

Field Summary

Fields

Modifier and Type	Field	Description
private final int	ALL_TILES	The maximum possible tiles fitting onto the board.
private int	bodyParts	The current length of the snake.
private int	cigarsEaten	The number of cigars eaten during this round.
private int	cigarX	The current grid X coordinate of the cigar target.
private int	cigarY	The current grid Y coordinate of the cigar target.
private char	direction	The active snake movement direction (U, D, L, R).
private final int	HEIGHT	The height of the game board in pixels.
private Random	random	Random generator used to spawn new cigars.
private boolean	running	Flag indicating if the game loop is active.
private final int	TILE_SIZE	The size of a single grid square in pixels.
private Timer	timer	The animation and tick update timer.
private final int	WIDTH	The width of the game board in pixels.
private final int[]	x	Array tracking the horizontal coordinates of all snake segments.
private final int[]	y	Array tracking the vertical coordinates of all snake segments.

Fields inherited from class JComponent

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

Fields inherited from class Component

accessibleContext, BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT

Fields inherited from interface ImageObserver

ABORT, ALLBITS, ERROR, FRAMEBITS, PROPERTIES, SOMEBITS

Constructor Summary

Constructors

Constructor	Description
Snake()	Constructs a new Snake game panel, initializing keyboard events and starting the game.

Method Summary

Modifier and Type	Method	Description
void	actionPerformed(ActionEvent e)
void	checkCigar()	Checks if the head has collided with a cigar.
void	checkCollisions()	Checks for collisions with walls or the snake's own body.
void	draw(Graphics g)	Renders the game elements.
void	gameOver(Graphics g)	Renders the game over screen.
static void	main(String[] args)	Launcher for the Mapacho Snake game.
void	move()	Updates the snake's position based on the current direction.
void	newCigar()	Randomly positions a new cigar on the grid.
void	paintComponent(Graphics g)
void	startGame()	Initializes the game state and starts the animation timer.

Methods inherited from class JPanel

getAccessibleContext, getUI, getUIClassID, paramString, setUI, updateUI

Methods inherited from class 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 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 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 Object

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

Field Details

TILE_SIZE

private final int TILE_SIZE

The size of a single grid square in pixels.

See Also:

• Constant Field Values

WIDTH

private final int WIDTH

The width of the game board in pixels.

See Also:

• Constant Field Values

HEIGHT

private final int HEIGHT

The height of the game board in pixels.

See Also:

• Constant Field Values

ALL_TILES

private final int ALL_TILES

The maximum possible tiles fitting onto the board.

See Also:

• Constant Field Values

x

private final int[] x

Array tracking the horizontal coordinates of all snake segments.

y

private final int[] y

Array tracking the vertical coordinates of all snake segments.

bodyParts

private int bodyParts

The current length of the snake.

cigarsEaten

private int cigarsEaten

The number of cigars eaten during this round.

cigarX

private int cigarX

The current grid X coordinate of the cigar target.

cigarY

private int cigarY

The current grid Y coordinate of the cigar target.

direction

private char direction

The active snake movement direction (U, D, L, R).

running

private boolean running

Flag indicating if the game loop is active.

timer

private Timer timer

The animation and tick update timer.

random

private Random random

Random generator used to spawn new cigars.

Constructor Details

Snake

public Snake()

Constructs a new Snake game panel, initializing keyboard events and starting the game.

Method Details

startGame

public void startGame()

Initializes the game state and starts the animation timer.

paintComponent

public void paintComponent(Graphics g)

Handles the visual rendering of the mapacho-snake, the cigars, and the HUD (score and status messages).

Overrides:

paintComponent in class JComponent

draw

public void draw(Graphics g)

Renders the game elements.

Parameters:

g - the graphics context.

newCigar

public void newCigar()

Randomly positions a new cigar on the grid.

move

public void move()

Updates the snake's position based on the current direction.

checkCigar

public void checkCigar()

Checks if the head has collided with a cigar.

checkCollisions

public void checkCollisions()

Checks for collisions with walls or the snake's own body.

gameOver

public void gameOver(Graphics g)

Renders the game over screen.

Parameters:

g - the graphics context.

actionPerformed

public void actionPerformed(ActionEvent e)

The primary game loop triggered by the timer.

Specified by:

actionPerformed in interface ActionListener

main

public static void main(String[] args)

Launcher for the Mapacho Snake game.

Parameters:

args - command line arguments (ignored).