Do they stamp your passport on cruises to other countries?

Question

I am going on a cruise to three different countries (Italy, Greece, and Croatia) and I wondered if they stamp your passport when you get off the ship and enter those countries.

Answer 1

no they don't, only when you enter a country via air travel

Answer 2

They probably wont in Greece and Italy but I would of thought that you would still get a stamp in Croatia.