java连连看程序中的一部分，请求牛人帮忙注释一下

private void delete(Point p1,final Point p2 , boolean bDelete){   
  ArrayList points=new ArrayList();
  if(corner1==null){
   points.add(p1);
   points.add(p2);
  }
  else if(corner2==null){
   points.add(p1);
   points.add(corner1);
   points.add(p2);
  }
  else{
   if(p1.x!=corner1.x&&p1.y!=corner1.y){
    Point pt=corner1;
    corner1=corner2;
    corner2=pt;
   }
   points.add(p1);
   points.add(corner1);
   points.add(corner2);
   points.add(p2);
  }
  if(bDelete){
   delete(p1); delete(p2); 
  }
  notifyEffect(points);
 }
 public int getCols() {
  return cols;
 }

 private ArrayList getHSpaces(Point p,Point pg){
  ArrayList ps=new ArrayList();
  //左
  for(int dif=1; ;dif++){
   int col=p.y-dif;
   int row=p.x;
   if(col<0||(data[row][col]!=0&&!pg.equals(new Point(row,col)))) break;
   ps.add(new Point(row,col));
  }
  //右
  for(int dif=1; ;dif++){
   int col=p.y+dif;
   int row=p.x;
   if(col>=cols||(data[row][col]!=0&&!pg.equals(new Point(row,col)))) break;
   ps.add(new Point(row,col));
  }
  return ps;
 }

 public int[][] getMaps(){
  return data;
 }

 public int getRows() {
  return rows;
 }

 public Point getSltMatrix() {
  return sltMatrix;
 }

 /*
  * p 原点
  *纵向空白点(包括与原点等值的点)
  */
 private ArrayList getVSpaces(Point p,Point pg)//获得脚步
 {
  ArrayList ps=new ArrayList();
  //左
  for(int dif=1; ;dif++){
   int col=p.y;
   int row=p.x-dif;
   if(row<0||(data[row][col]!=0&&!pg.equals(new Point(row,col)))) break;
   ps.add(new Point(row,col));
  }
  //右
  for(int dif=1; ;dif++){
   int col=p.y;
   int row=p.x+dif;
   if(row>=rows||(data[row][col]!=0&&!pg.equals(new Point(row,col)))) break;

   ps.add(new Point(row,col));
  }
  return ps;
 }