Java tutorial
import java.util.HashMap; import java.util.Map; class Pizza { } class CheesePizza extends Pizza { } class VeggiePizza extends Pizza { } public class Main { public static void main(String... args) { Map<String, Pizza> pizzaStock = new HashMap<String, Pizza>(); pizzaStock.put("cheese", new CheesePizza()); pizzaStock.put("veggie", new VeggiePizza()); System.out.println(pizzaStock); } }