[Ch10b] Tidying up Jukebox1 and MockSongs code

package ch10b;

import java.util.ArrayList;

import java.util.Collections;

import java.util.List;

import java.util.*;

public class Jukebox1 {

  // QU: Should this be a List or ArrayList? Have we covered this?

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

  public static void main(String[] args) {

    new Jukebox1().go();

  }

  public void go() {

    Songs s = new Songs();

    songList = s.getSongs();

    List<String> songList = MockSongs.getSongStrings();

    System.out.println(songList);

    // Next step adds the following

    Collections.sort(songList);

// Below is the "mock" code. A stand in for the actual

// I/O code that the other programmer will provide later

class Songs {

  public List<String> getSongs() {

    ArrayList<String> songDB = new ArrayList<>();

    songDB.add("somersault");

    songDB.add("cassidy");

    songDB.add("$10");

    songDB.add("havana");

    songDB.add("Cassidy");

    songDB.add("50 Ways");

    return songDB;

class MockSongs {

  public static List<String> getSongStrings() {

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

    songs.add("somersault");

    songs.add("cassidy");

    songs.add("$10");

    songs.add("havana");

    songs.add("Cassidy");

    songs.add("50 Ways");

    return songs;

  }

}

 No newline at end of file

  }

  public void go() {

    Songs s = new Songs();

    List<String> songList = s.getSongs();

    MockSongs s = new MockSongs();

    List<String> songList = s.getSongStrings();

    System.out.println(songList);

    Collections.sort(songList);

    System.out.println("\n" + songList);