How to implemet ABAP with ALV

I have encountered a problem in ABAP. I am trying to use ALV grid with object oriented concept, but facing issue while assigning object to Grid Class. It is also not allowing me to use Submit Clause for background memory usage. Is there any other simple way to use ALV? Can someone explain the concept of oops with ALV grid by some examples? It will be helpful if you can show some snippet of working code and describe the same.