public void updateTrackLabel(Track t) {
        String result = "";

        String s;
        if ((s = t.get("title")) == null)
            s = "Unknown";
        result += s + " - ";
        if ((s = t.get("artist")) == null)
            s = "Unknown";
        result += s + " - ";
        if ((s = t.get("album")) == null)
            s = "Unknown";
        result += s;

        track_label.setText(result);
        track_label.setFont(Font.font("Arial", 14));
    }