private void playSong(){
        if(songStatus == SONG_STOPPED){
            Song selectedSong = playerLibrary.getSongByIndex(titlesList.getSelectedIndex());
            myPlayer = new MP3Player(selectedSong);
            new Thread(myPlayer).start();
            songStatus = SONG_PLAYING;
            songInfoField.setText(selectedSong.getTitle() + " - " + selectedSong.getArtist());
        }
        else if(songStatus == SONG_PAUSED){
           myPlayer.resumePlay();
           songStatus = SONG_PLAYING;
        }
    }