JAVA编程中g.drawImage(pict, a, b, 50, 50, this);函数出错



try

 {
    src = ImageIO.read(new File(str))；
}
 catch(Exception e)
 {
    System.out.println(e);
 }
    newpic = src.getSubimage(0, 0, 50, 50);
      
    pict = newpic;
    int b=W*(i%GameSize)+W;
    int a=W*(i/GameSize)+W;
    g.drawImage(pict, a,  b, 50, 50, this);

其中确保原图像中src中长和宽都有五十，不然会出错。。。。。。。。。。。。。