[Ch10b] Examples for factory methods

package ch10b;

import java.util.*;

public class CollectionsFactoryMethods {

  public static List<String> createAListOldSchool() {

    List<String> songs = new ArrayList<>();

    songs.add("somersault");

    songs.add("cassidy");

    songs.add("$10");

    return Collections.unmodifiableList(songs);

  }

  public static void createAList() {

    List<String> strings = List.of("somersault", "cassidy", "$10");

  }

  public static void createAListOfSongs() {

    List<SongV2> songs = List.of(new SongV2("somersault", "zero 7", "50"),

                                 new SongV2("cassidy", "grateful dead", "65"),

                                 new SongV2("$10", "hitchhiker", "80"));

  }

  public static void createASet() {

    Set<Book> books = Set.of(new Book("How Cats Work"),

                             new Book("Remix your Body"),

                             new Book("Finding Emo"));

  }

  public static void createAMap() {

    Map<String, Integer> scores = Map.of("Kathy", 42,

                                         "Bert", 343,

                                         "Skyler", 420);

  }

  public static void createAMapOfSameTypes() {

    Map<String, String> favouriteStores = Map.of("Riley", "Supersports",

                                                 "Brooklyn", "Camera World",

                                                 "Jay", "Homecase");

  }

  public static void createAMapOfEntries() {

    Map<String, String> favouriteStores = Map.ofEntries(Map.entry("Riley", "Supersports"),

                                                        Map.entry("Brooklyn", "Camera World"),

                                                        Map.entry("Jay", "Homecase"));

  }

}