Design a musical jukebox using OO principles | Runhe Tian Coding Practice

Design a musical jukebox using OO principles | Runhe Tian Coding Practice

Design a musical juke box using object oriented principles.

Apparently, you need have functionality of playlist which I didn’t come up.
I don’t understand why we need User class.
Perhaps we are thinking about two kinds of ‘jukebox’?

public class CD {

}

 

public class CDPlayer {

    private Playlist p;

    private CD c;

 

    public Playlist getPlaylist() {

        return p;

    }

 

    public void setPlaylist(Playlist p) {

        this.p = p;

    }

 

    public CD getCD() {

        return c;

    }

 

    public void setCD(CD c) {

        this.c = c;

    }

 

    public CDPlayer(Playlist p) {

        this.p = p;

    }

 

    public CDPlayer(CD c, Playlist p) {

        // TODO

    }

 

    public CDPlayer(CD c) {

        this.c = c;

    }

 

    public void playTrack(MySong s) {

        // TODO

    }

}

 

public class JukeBox {

    private CDPlayer cdPlayer;

    private User user;

    private Set<CD> cdCollection;

    private TrackSelector ts;

 

    public JukeBox(CDPlayer cdPlayer, User user, Set<CD> cdCollection,

            TrackSelector ts) { // TODO

 

    }

 

    public MySong getCurrentTrack() {

        return ts.getCurrentSong();

    }

 

    public void processOneUser(User u) {

        this.user = u;

    }

}

 

public class Playlist {

    private MySong track;

    private Queue<MySong> queue;

 

    public Playlist(MySong track, Queue<MySong> queue) { // TODO

 

    }

 

    public MySong getNextTrackToPlay() {

        return queue.peek();

    }

 

    public void queueUpTrack(MySong s) {

        queue.add(s);

    }

}

 

public class Song {

    private String songName;

}

 

public class TrackSelector {

    private MySong currentSong;

 

    public TrackSelector(MySong s) {

        currentSong = s;

    }

 

    public void setTrack(MySong s) {

        currentSong = s;

    }

 

    public MySong getCurrentSong() {

        return currentSong;

    }

}

 

public class User {

    private String name;

 

    public String getName() {

        return name;

    }

 

    public void setName(String name) {

        this.name = name;

    }

 

    public long getID() {

        return ID;

    }

 

    public void setID(long iD) {

        ID = iD;

    }

 

    private long ID;

 

    public User(String name, long iD) { // TODO

 

    }

 

    public User getUser() {

        return this;

    }

 

    public User addUser(String name, long iD) {// TODO

        return null;

    }

}

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