here is my main program:

 

 for (int i = 0; i < shots.size(); i++) // This "something" is the number of objects in the "shots" arraylist.
    {

        Shot shot = (Shot) shots.get(i);
       
        shot.display();
        shot.move();
       
        // This will be another for-loop nested inside of the above for-loop.
        // This new for-loop will test and resolve collisions between the
        // asteroids and the bullets.
        for (int j = 0; j < 12; j++) // This "something" is the number of asteroids that exist in your asteroids array.
        {
            // if the shot collides with the asteroid...
            if(shot.shape.isInside(asteroid[i].shape))
            {
               
                shots.remove(j);

                asteroid[j].reset();

                score+=5;
            }
        }
    }
   
   
}

 

 

 

 

here is the shot class:

 

 

class Shot
{

    Shape shape;

    Shot(Loc center, float direction, AudioSample player) {

        Loc shotCenter = new Loc(center.x, center.y);
       

        Loc[] points = new Loc[3];

        points[0]= new Loc(center.x, center.y-1);
        points[1]= new Loc(center.x+1, center.y-1);
        points[2]=new Loc(center.x-1, center.y+1);

        shape = new Shape(shotCenter, points, direction);
        shape.restart=false;
       
    }
    //display shot 
    void display() {
        shape.display();
    }

    //advance shot
    void move() {
        shape.move(10);
    }
   
    boolean isInside(Shape s) {
      return shape.isInside(s);
    }
}