java贪吃蛇代码及详解

package worm; import java.awt.Graphics; import java.awt.event.KeyAdapter; import java.awt.event.KeyEvent; import java.util.Random; import java.util.Timer; import java.util.TimerTask; import javax.swing.JPanel; public class WormStage extends JPanel{ private Food food ; private Worm worm ; private Timer timer =new Timer() ; public WormStage(){ worm = new Worm() ; food = randomFood() ; } //重写父类中的paint方法 public void paint(Graphics g){ super.paint(g) ; //画食物 g.setColor(food.getColor()) ; g.fillRect(food.getX(), food.getY(), food.getWidth(), food.getHeight()); //画蛇 for(int i = 0 ; i<worm.getCells().length; i++){ Cell cell = worm.getCells()[i] ; g.setColor(cell.getColor()) ; //g.fillRect(cell.getX(), cell.getY(), cell.getWidth(), cell.getHeight()) ; g.fill3DRect(cell.getX(), cell.getY(), cell.getWidth(), cell.getHeight(), true) ; } } //内部类 class MyKey extends KeyAdapter{ public void keyPressed(KeyEvent e) { int c = e.getKeyCode() ; if(c == KeyEvent.VK_UP){ if(worm.headBreak(Worm.UP, Util.STAGE_ROWS, Util.STAGE_COLS)){ System.out.println("撞到上边的墙，或者吃掉自己") ; //重新开始的处理 restart() ; return ; } if(worm.stepForEat(Worm.UP, food)) { //吃掉食物 food = randomFood() ; } } if(c == KeyEvent.VK_DOWN){ if(worm.headBreak(Worm.DOWN, Util.STAGE_ROWS, Util.STAGE_COLS)){ System.out.println("撞到下边的墙或者是吃掉自己") ; restart() ; return ; } if(worm.stepForEat(Worm.DOWN, food)) { food = randomFood(); } } if(c == KeyEvent.VK_LEFT){ if(worm.headBreak(Worm.LEFT, Util.STAGE_ROWS, Util.STAGE_COLS)){ System.out.println("撞到左边的墙或者是吃掉自己"); restart() ; return ; } if(worm.stepForEat(Worm.LEFT, food)) { food = randomFood() ; } } if(c == KeyEvent.VK_RIGHT){ if(worm.headBreak(Worm.RIGHT, Util.STAGE_ROWS, Util.STAGE_COLS)){ System.out.println("撞到右边的墙或者是吃掉自己"); restart() ; return ; } if(worm.stepForEat(Worm.RIGHT, food)) { food = randomFood() ; } } //paint 系统调用的 repaint() ;//通知系统去调用paint方法 } } //定义任务 // class Runner extends TimerTask{ // public void run(){ // //1.判断走一步是否撞墙 // if(worm.headBreak(Util.STAGE_ROWS, Util.STAGE_COLS)){ // restart() ; // return ; // } // //2.走一步 // if(worm.stepForEat(food)){ // food = randomFood() ; // } // repaint() ; // } // } //定义启动游戏的方法 public void go(){ //添加定时器任务 //timer.schedule(new Runner(), 0,100) ; //匿名内部类 timer.schedule(new TimerTask(){ public void run(){ //1.判断走一步是否撞墙 if(worm.headBreak(Util.STAGE_ROWS, Util.STAGE_COLS)){ restart() ; return ; } //2.走一步 if(worm.stepForEat(food)){ food = randomFood() ; } repaint() ; } }, 0,700) ; //获取键盘的焦点 this.requestFocus() ; this.addKeyListener(new MyKey()) ; } //追加随机生成食物的方法 public Food randomFood(){ Random random = new Random() ; // while(true){ // // } int i ; int j ; for(;;){ i = random.nextInt(Util.STAGE_ROWS); j = random.nextInt(Util.STAGE_COLS); if(worm.contains(i, j)){ continue ; } return new Food(i,j) ; } } //追加重新开始的方法 public void restart(){ worm = new Worm(); food = randomFood() ; //绘制 repaint() ; } }