//: holding/MapOfList.java package holding; import typeinfo.pets.*; import java.util.*; import static net.mindview.util.Print.*; public class MapOfList { public static Map> petPeople = new HashMap<>(); static { petPeople.put(new Person("Dawn"), Arrays.asList(new Cymric("Molly"),new Mutt("Spot"))); petPeople.put(new Person("Kate"), Arrays.asList(new Cat("Shackleton"), new Cat("Elsie May"), new Dog("Margrett"))); petPeople.put(new Person("Marilyn"), Arrays.asList( new Pug("Louie aka Louis Snorkelstein Dupree"), new Cat("Stanford aka Stinky el Negro"), new Cat("Pinkola"))); petPeople.put(new Person("Luke"), Arrays.asList(new Rat("Fuzzy"), new Rat("Fizzy"))); petPeople.put(new Person("Isaac"), Arrays.asList(new Rat("Freckly"))); } public static void main(String[] args) { print("People: " + petPeople.keySet()); print("Pets: " + petPeople.values()); for(Person person : petPeople.keySet()) { print(person + " has:"); for(Pet pet : petPeople.get(person)) print(" " + pet); } } } /* Output: People: [Person Marilyn, Person Luke, Person Isaac, Person Kate, Person Dawn] Pets: [[Pug Louie aka Louis Snorkelstein Dupree, Cat Stanford aka Stinky el Negro, Cat Pinkola], [Rat Fuzzy, Rat Fizzy], [Rat Freckly], [Cat Shackleton, Cat Elsie May, Dog Margrett], [Cymric Molly, Mutt Spot]] Person Marilyn has: Pug Louie aka Louis Snorkelstein Dupree Cat Stanford aka Stinky el Negro Cat Pinkola Person Luke has: Rat Fuzzy Rat Fizzy Person Isaac has: Rat Freckly Person Kate has: Cat Shackleton Cat Elsie May Dog Margrett Person Dawn has: Cymric Molly Mutt Spot *///:~