I'm trying to figure out how to port J.Tarbells substrate to another language

When it comes to type declarations, what does this mean in Processing:

SandPainter[] sands;

I think [] means declaring an array, but what the tag "sands" afterwards means, and its single usage in the source code besides the declaration:

...
    }
    // draw sand painter
    sp.render(rx,ry,x,y);
  }
}
sands

class SandPainter {....

what is it doing outside the {} ?