贪食蛇 java写的

package gui; import java.awt.Canvas; import java.awt.Color; import java.awt.Dimension; import java.awt.Graphics; import java.awt.event.KeyEvent; import java.awt.event.KeyListener; import java.util.Random; import java.util.Vector; import model.Block; import model.Body; import model.Food; import model.Snake; import model.Tail; import util.Direction; public class SnakeCanvas extends Canvas implements KeyListener { /** * */ private static final long serialVersionUID = -4989895601085448933L; public static final int BOX_LENGTH = 10; public static final int FOODSCOUNT = 3; private Snake snake; private Block[][] blocks; private Food[] foods; private int width; private int height; int count = 0; int max = 0; Vector<Tail> body = new Vector<Tail>(); public void setSnake(Snake snake) { this.snake = snake; } public Snake getSnake() { return snake; } public int getWidth() { return width; } public void setWidth(int width) { this.width = width / BOX_LENGTH; } public int getHeight() { return height; } public void setHeight(int height) { this.height = height / BOX_LENGTH; } private void initBlock() { blocks = new Block[getWidth()][getHeight()]; for (int i = 0; i < getWidth(); i++) { for (int j = 0; j < getHeight(); j++) { blocks[i][j] = new Block(); blocks[i][j].setX(BOX_LENGTH*i); blocks[i][j].setY(BOX_LENGTH*j); } } } private void initFood() { foods = new Food[FOODSCOUNT]; for (int i = 0; i < FOODSCOUNT; i++) { foods[i] = new Food(); setFood(i); } } private void setFood(int index) { int x, y; Random r = new Random(); r.setSeed(index*r.nextLong()); x = Math.abs(r.nextInt()%getWidth()); y = Math.abs(r.nextInt()%getHeight()); if (snake != null) { Snake s = snake; do { if (s.getX() == x && s.getY() == y) { setFood(index); } s = s.getNext(); } while (s.hasNext()); } foods[index].setX(x); foods[index].setY(y); } /** * 初始化大小 * @param x 横向px * @param y 纵向px */ public SnakeCanvas(int x, int y) { setWidth(x); setHeight(y); setSize(new Dimension(getWidth()*BOX_LENGTH, getHeight()*BOX_LENGTH)); setBackground(Color.BLACK); addKeyListener(this); initBlock(); initFood(); } public void paint(Graphics g) { count--; Snake block = getSnake(); for (Food f : foods) { if (block.getX() == f.getX() && block.getY() == f.getY()) { body.add(eatFood(f)); break; } f.draw(g, blocks); } for (;;) { block.draw(g, blocks); if (block.hasNext()) { block.getNext().setMoveFlag(block.getOldMoveFlag()); block.setOldMoveFlag(block.getMoveFlag()); block = block.getNext(); } else { if (body.size() != 0 && block.getX() == body.get(0).getX() && block.getY() == body.get(0).getY()) { if (count < 0) { count = 0; } max += 2; count += 2; } if (body.size() != 0 && count >= 0 && count != max && count%2 == 0) { Body b = new Body(block.getX(), block.getY()); b.setMoveFlag(block.getMoveFlag()); b.setOldMoveFlag(block.getOldMoveFlag()); b.setNext(body.get(0)); block.getPrevious().setNext(b); body.get(0).setPrevious(b); body.get(0).setMoveFlag(b.getOldMoveFlag()); b.setOldMoveFlag(b.getMoveFlag()); body.get(0).draw(g, blocks); body.get(0).setOldMoveFlag(body.get(0).getMoveFlag()); body.remove(0); max -= 2; break; } block.setOldMoveFlag(block.getMoveFlag()); break; } } } /** * 是否可变向，上<->下，左<->右,不能直接变向 */ private void canMove(int moveFlag) { if (Math.abs(moveFlag - snake.getOldMoveFlag()) != 2) { snake.setMoveFlag(moveFlag); } } @Override public void keyPressed(KeyEvent e) { // TODO Auto-generated method stub int key = e.getKeyCode(); if (key == KeyEvent.VK_UP) { canMove(Direction.UP); } else if (key == KeyEvent.VK_DOWN) { canMove(Direction.DOWN); } else if (key == KeyEvent.VK_LEFT) { canMove(Direction.LEFT); } else if (key == KeyEvent.VK_RIGHT) { canMove(Direction.RIGHT); } repaint(); e.consume(); } private Tail eatFood(Food f) { int x = f.getX(), y = f.getY(); Tail tail = new Tail(x, y); f.setX(-1); f.setY(-1); return tail; } @Override public void keyReleased(KeyEvent e) { // TODO Auto-generated method stub } @Override public void keyTyped(KeyEvent e) { // TODO Auto-generated method stub } }