package snake;public class SnakeNode {	private int x;	private int y;	private SnakeNode next;	private SnakeNode ahead;	public SnakeNode() {	}	public SnakeNode(int x, int y) {		super();		this.x = x;		this.y = y;	}	public int getX() {		return x;	}	public void setX(int x) {		this.x = x;	}	public int getY() {		return y;	}	public void setY(int y) {		this.y = y;	}	public SnakeNode getNext() {		return next;	}	public void setNext(SnakeNode next) {		this.next = next;	}	public SnakeNode getAhead() {		return ahead;	}	public void setAhead(SnakeNode ahead) {		this.ahead = ahead;	}}

package snake;import java.awt.BorderLayout;import java.awt.GridLayout;import java.awt.KeyEventPostProcessor;import java.awt.KeyboardFocusManager;import java.awt.event.KeyEvent;import java.util.Random;import javax.swing.ImageIcon;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JOptionPane;import javax.swing.JPanel;/** * Created by hackcoder on 15-3-11. */public class Snake extends JFrame {	private static final int rows = 60;	private static final int columns = 80;	// 方向	private static final int UP = 1;	private static final int RIGHT = 2;	private static final int DOWN = 3;	private static final int LEFT = 4;	private static int DRIECTION_NOW = RIGHT;	private static boolean isEat = false;	private static int TAILX;	private static int TAILY;	private static SnakeNode snakeHeader = new SnakeNode();	private static SnakeNode snakeTailer = snakeHeader;	private static SnakeNode food = new SnakeNode();	private static JLabel[] images = new JLabel[rows * columns];	public static void main(String args[]) {		snakeHeader.setX(new Random().nextInt(rows - 1));		snakeHeader.setY(new Random().nextInt(columns - 1));		Snake snake = new Snake();		food = getFood();		while (true) {			try {				next();				// 吃到了食物				if (food.getX() == snakeHeader.getX()						&& food.getY() == snakeHeader.getY()) {					addTail();					isEat = true;				}				//吃到食物，重新生成一個食物				if (isEat) {					food = getFood();				}				// 判斷是否結束游戲				if (judgeEND()) {					JOptionPane.showMessageDialog(null, "游戲結束！", "游戲結束！",							JOptionPane.ERROR_MESSAGE);					break;				}				SnakeNode pNow = snakeHeader;				while (pNow != null) {					images[columns * pNow.getX() + pNow.getY()]							.setIcon(new ImageIcon("image/black.jpg", ""));					pNow = pNow.getNext();				}				images[columns * food.getX() + food.getY()]						.setIcon(new ImageIcon("image/black.jpg", ""));				Thread.sleep(100);				// 清理				pNow = snakeHeader;				while (pNow != null) {					images[columns * pNow.getX() + pNow.getY()]							.setIcon(new ImageIcon("image/white.jpg", ""));					pNow = pNow.getNext();				}				images[columns * food.getX() + food.getY()]						.setIcon(new ImageIcon("image/white.jpg", ""));				isEat = false;			} catch (InterruptedException e) {				e.printStackTrace();			}		}	}	public Snake() {		init();		this.setBounds(80, 80, 400, 400);		this.setVisible(true);		setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);		// 添加全局鍵盤監聽		KeyboardFocusManager manager = KeyboardFocusManager				.getCurrentKeyboardFocusManager();		manager.addKeyEventPostProcessor((KeyEventPostProcessor) this				.getMyKeyEventHandler());	}	/**	 * 初始化地圖	 */	public void init() {		JPanel p = new JPanel(new GridLayout(rows, columns, 1, 1));		setLayout(new BorderLayout());		for (int x = 0; x < rows; x++) {			for (int y = 0; y < columns; y++) {				ImageIcon imageIcon;				if (x == 0 || x == rows - 1 || y == 0 || y == columns - 1) {					imageIcon = new ImageIcon("image/red.jpg", "");				} else {					imageIcon = new ImageIcon("image/white.jpg", "");				}				images[columns * x + y] = new JLabel(imageIcon);				p.add(images[columns * x + y]);			}		}		getContentPane().add(p, BorderLayout.CENTER);	}	/**	 * 鍵盤監聽	 * 	 * @return	 */	public KeyEventPostProcessor getMyKeyEventHandler() {		return new KeyEventPostProcessor() {			public boolean postProcessKeyEvent(KeyEvent e) {				if (e.getID() != KeyEvent.KEY_PRESSED) {					return false;				}				int keycode = e.getKeyCode();				if (keycode == KeyEvent.VK_UP) {					if (snakeHeader.getNext() != null) {						// 判斷方向是否可轉						int x1 = snakeHeader.getX();						int y1 = snakeHeader.getY();						int x2 = snakeHeader.getNext().getX();						int y2 = snakeHeader.getNext().getY();						if (y1 == y2 && x1 - x2 == 1) {							return true;						}					}					DRIECTION_NOW = UP;				} else if (keycode == KeyEvent.VK_RIGHT) {					if (snakeHeader.getNext() != null) {						int x1 = snakeHeader.getX();						int y1 = snakeHeader.getY();						int x2 = snakeHeader.getNext().getX();						int y2 = snakeHeader.getNext().getY();						if (x1 == x2 && y2 - y1 == 1) {							return true;						}					}					DRIECTION_NOW = RIGHT;				} else if (keycode == KeyEvent.VK_DOWN) {					if (snakeHeader.getNext() != null) {						int x1 = snakeHeader.getX();						int y1 = snakeHeader.getY();						int x2 = snakeHeader.getNext().getX();						int y2 = snakeHeader.getNext().getY();						if (y1 == y2 && x2 - x1 == 1) {							return true;						}					}					DRIECTION_NOW = DOWN;				} else if (keycode == KeyEvent.VK_LEFT) {					if (snakeHeader.getNext() != null) {						int x1 = snakeHeader.getX();						int y1 = snakeHeader.getY();						int x2 = snakeHeader.getNext().getX();						int y2 = snakeHeader.getNext().getY();						if (x1 == x2 && y1 - y2 == 1) {							return true;						}					}					DRIECTION_NOW = LEFT;				}				return true;			}		};	}	/**	 * 計算貪吃蛇的方向及位移	 * 	 * @param header	 */	public static void next() {		if (snakeHeader == null)			return;		TAILX = snakeTailer.getX();		TAILY = snakeTailer.getY();		SnakeNode pNow = snakeTailer;		while (pNow != null) {			if (pNow == snakeHeader) {				break;			}			pNow.setX(pNow.getAhead().getX());			pNow.setY(pNow.getAhead().getY());			pNow = pNow.getAhead();		}		if (DRIECTION_NOW == RIGHT) {			snakeHeader.setY(snakeHeader.getY() + 1);		} else if (DRIECTION_NOW == LEFT) {			snakeHeader.setY(snakeHeader.getY() - 1);		} else if (DRIECTION_NOW == UP) {			snakeHeader.setX(snakeHeader.getX() - 1);		} else if (DRIECTION_NOW == DOWN) {			snakeHeader.setX(snakeHeader.getX() + 1);		}	}	public static void addTail() {		SnakeNode tail = new SnakeNode(TAILX, TAILY);		snakeTailer.setNext(tail);		tail.setAhead(snakeTailer);		snakeTailer = snakeTailer.getNext();	}	public static SnakeNode getFood() {		SnakeNode food = new SnakeNode();		boolean flag = true;		while (true) {			int x = new Random().nextInt(rows);			int y = new Random().nextInt(columns);			if (x == 0 || x == rows - 1 || y == 0 || y == columns - 1) {				continue;			}			SnakeNode pNow = snakeHeader;			while (pNow != null) {				if (x == pNow.getX() && y == pNow.getY()) {					flag = false;				}				pNow = pNow.getNext();			}			if (flag) {				food = new SnakeNode(x, y);				break;			}		}		return food;	}	public static boolean judgeEND() {		//碰墻判斷		if (snakeHeader.getX() == 0 || snakeHeader.getX() == rows - 1				|| snakeHeader.getY() == 0 || snakeHeader.getY() == columns - 1) {			return true;		}		//碰身體判斷		SnakeNode pNow = snakeHeader.getNext();		while (pNow != null) {			if (snakeHeader.getX() == pNow.getX()					&& snakeHeader.getY() == pNow.getY()) {				System.out.println("=========碰到身體===========");				return true;			}			pNow = pNow.getNext();		}		return false;	}}