Code from p535

import java.util.*;

public class Jukebox3 {

    ArrayList<SongV2> mySongs;

    MockSongV2File mockFile = new MockSongV2File();

    public static void main(String[] args) {

        new Jukebox3().go();

    }

    public void go() {

        mySongs = mockFile.getSongsV2();

        System.out.println(mySongs);

        // This line intentionally fails compilation

//        Collections.sort(mySongs);

        System.out.println(mySongs);

    }

}

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import java.util.ArrayList;

class MockSongV2File {

    public ArrayList<SongV2> getSongsV2() {

        ArrayList<SongV2> mySongs = new ArrayList<SongV2>();

        mySongs.add(new SongV2("somersault", "zero 7", "50"));

        mySongs.add(new SongV2("cassidy", "grateful dead", "65"));

        mySongs.add(new SongV2("$10", "hitchhiker", "80"));

        mySongs.add(new SongV2("havana", "cabello", "60"));

        mySongs.add(new SongV2("Cassidy", "grateful dead", "65"));

        mySongs.add(new SongV2("50 ways", "simon", "70"));

        return mySongs;

    }

}

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class SongV2 {

    String title;

    String artist;

    String bpm;

    SongV2(String t, String a, String b) {

        title = t;

        artist = a;

        bpm = b;

    }

    public String getTitle() {

        return title;

    }

    public String getArtist() {

        return artist;

    }

    public String getBpm() {

        return bpm;

    }

    public String toString() {

        return title;

    }

}