[Ch10c] Pool puzzle

package ch10c;

import java.util.Comparator;

import java.util.List;

import java.util.Optional;

import java.util.stream.Collectors;

public class StreamPuzzle {

  public static void main(String[] args) {

    List<Song> songs = new JukeboxData.Songs().getSongs();

    List<String> topFive = songs.stream()

                                .sorted(Comparator.comparingInt(Song::getTimesPlayed))

                                .map(song -> song.getTitle())

                                .limit(5)

                                .collect(Collectors.toList());

    System.out.println("Top 5 songs: " + topFive);

    searchForArtist(songs, "The Beatles");

    searchForArtist(songs, "The Beach Boys");

  }

  private static void searchForArtist(List<Song> songs, String artist) {

    Optional<Song> result = songs.stream()

                                 .filter(song -> song.getArtist().equals(artist))

                                 .findFirst();

    if (result.isPresent()) {

      System.out.println(result.get().getTitle());

    } else {

      System.out.println("No songs found by: " + artist);

    }

  }

}