Help Me to make playlist song

Question

how to add the new song from jfilechooser but the older playlist is saved in table or another.
so how to add many song in playlist, i want to make a media player with javaFX.
thanks i need help for my study

Answer 1

Hi,
I did it in my app: adding songs to a table. The first thing to do is to create a JavaBean that contains the information you want inside your table. When doing this you have to respect the conventions defined by JFX for properties (you can find them here: http://docs.oracle.com/javafx/2/binding/jfxpub-binding.htm)
For example I created a Song class:
public class Song implements Serializable {
    private ReadOnlyObjectProperty<Media> media;
    private ReadOnlyStringProperty artist;
    private ReadOnlyStringProperty album;
    private ReadOnlyStringProperty title;
    private ReadOnlyStringProperty duration;
    public Song(URI uri) {
        if (uri == null) {
            throw new NullPointerException("Can not create the song with a null URI");
        this.media = new SimpleObjectProperty<>(new Media(uri.toString()));
        this.artist = new SimpleStringProperty("Unknown");
        this.album = new SimpleStringProperty("Unknown");
        this.title = new SimpleStringProperty("Unknow");
        this.duration = new SimpleStringProperty("--:--:--");
        this.media.get().getMetadata().addListener(new MapChangeListener<String, Object>() {
            @Override
            public void onChanged(Change<? extends String, ? extends Object> change) {
                if (change.getKey().equals("title")) {
                    if (change.wasAdded()) {
                        ((SimpleStringProperty) Song.this.titleProperty()).set(change.getValueAdded().toString());
                    } else {
                        ((SimpleStringProperty) Song.this.titleProperty()).set("Unknown");
                } else if (change.getKey().equals("artist")) {
                    if (change.wasAdded()) {
                        ((SimpleStringProperty) Song.this.artistProperty()).set(change.getValueAdded().toString());
                    } else {
                        ((SimpleStringProperty) Song.this.artistProperty()).set("Unknown");
                } else if (change.getKey().equals("album")) {
                    if (change.wasAdded()) {
                        ((SimpleStringProperty) Song.this.albumProperty()).set(change.getValueAdded().toString());
                    } else {
                        ((SimpleStringProperty) Song.this.albumProperty()).set("Unknown");
        this.media.get().durationProperty().addListener(new InvalidationListener() {
            @Override
            public void invalidated(Observable o) {
                if(media.get().durationProperty().get() == Duration.UNKNOWN) {
                    ((SimpleStringProperty) duration).set("--:--:--");
                } else {
                    double initialTime = media.get().durationProperty().get().toSeconds();
                    int numberOfHour = (int) initialTime / 3600;
                    int numberOfMinutes;
                    int numberOfSeconds;
                    double remainingTime = initialTime % 3600;
                    if (remainingTime == 0) {
                        numberOfMinutes = 0;
                        numberOfSeconds = 0;
                    } else {
                        numberOfMinutes = (int) remainingTime / 60;
                        numberOfSeconds = (int) remainingTime % 60;
                    ((SimpleStringProperty) duration).set(String.format("%1$02d:%2$02d:%3$02d", numberOfHour, numberOfMinutes, numberOfSeconds));
    public final String getArtist() {
        return this.artistProperty().get();
    public ReadOnlyStringProperty artistProperty() {
        return this.artist;
    public final String getAlbum() {
        return this.albumProperty().get();
    public ReadOnlyStringProperty albumProperty() {
        return this.album;
    public final String getTitle() {
        return this.titleProperty().get();
    public ReadOnlyStringProperty titleProperty() {
        return this.title;
    public final String getDuration() {
        return this.durationProperty().get();
    public ReadOnlyStringProperty durationProperty() {
        return this.duration;
    public final Media getMedia() {
        return this.mediaProperty().get();
    public ReadOnlyObjectProperty<Media> mediaProperty() {
        return this.media;
}And then, when you have your TableView, you can do something like this:
public class MusicController implements Initializable {
    TableView<Song> songsTableView;
    @FXML
    private TableColumn<Song, String> titleColumn;
    @FXML
    private TableColumn<Song, String> albumColumn;
    @FXML
    private TableColumn<Song, String> artistColumn;
    @FXML
    private TableColumn<Song, Duration> durationColumn;
    @Override
    public void initialize(URL arg0, ResourceBundle arg1) {
        this.artistColumn.setCellValueFactory(new PropertyValueFactory<Song, String>("artist"));
        this.albumColumn.setCellValueFactory(new PropertyValueFactory<Song, String>("album"));
        this.titleColumn.setCellValueFactory(new PropertyValueFactory<Song, String>("title"));
        this.durationColumn.setCellValueFactory(new PropertyValueFactory<Song, Duration>("duration"));
}And to add a song to the table, you just need to do something like this:
this.songsTableView.getItems().add(new Song(file.toURI()));And the rest is done for you :)
I didn't implement a double-click event yet.