This post will teach you how to manipulate ID3 tags of MP3 files using Java Jid3Lib Tag Library. First, download the jar file from http://javamusictag.sourceforge.net/.

The code below will show you how to get any information of MP3 file:

try {
    MP3File mp3 = new MP3File("D:\\Musics\\MP3\\ACDC\\ACDC - Back In Black.mp3");
    System.out.println("Album:" + mp3.getID3v2Tag().getAlbumTitle());
    System.out.println("Band:" + mp3.getID3v2Tag().getLeadArtist());
    System.out.println("Composer:" + mp3.getID3v2Tag().getAuthorComposer());
    System.out.println("Year:" + mp3.getID3v2Tag().getYearReleased());
} catch (Exception e) {
	e.printStackTrace();
}

The result:

Album: Back in Black
Band: AC/DC
Composer: Angus Young/Brian Johnson/Malcolm Young
Year:

To change any information of any ID3 tags, try the code bellow:

mp3.getID3v2Tag().setYearReleased("1980");
mp3.save();

This library has many methods that help you to customize any MP3 file.