bubblepos=new int[3][2];

    bubblepos[0][0]=100;

    bubblepos[0][1]=450;

    bubblepos[1][0]=300;

    bubblepos[1][1]=400;

    bubblepos[2][0]=500;

    bubblepos[2][1]=350;

    starttime=System.currentTimeMillis();  //记录游戏开始毫秒数

this.setCursor(new Cursor(Cursor.MOVE_CURSOR)); 

//设置鼠标形状为移动式

  }

  public void update(Graphics g)

  {  

    paint(g);  

  }

  public void paint(Graphics g)

  {

    /*创建后台图形对象*/

    offScreenImage=createImage(640,480);

    offScreen=offScreenImage.getGraphics();

    if(life<0)  //生命值小于0则结束游戏

    {

      offScreen.setFont(new Font("Dialog",Font.PLAIN,28));

      offScreen.setColor(Color.yellow);

      offScreen.drawString("得分:"+score,20,20);

      offScreen.setFont(new Font("Dialog",Font.PLAIN,60));

      offScreen.setColor(Color.red);

      offScreen.drawString("游戏结束",200,250);

      g.drawImage(offScreenImage,0,0,this);

      return;

    }

    //显示大鲨鱼图形   

    if(direction==1)

      offScreen.drawImage(image0z,mousex,mousey,this);

    else

      offScreen.drawImage(image0f,mousex,mousey,this);

    //显示所有的小鱼图形

    if(showfish1==1)

    if(fishpos[0][0]%50==0)

      offScreen.drawImage(image1z,fishpos[0][0],fishpos[0][1],this);

    else