How to play an audio mp3 and others in Java

Using JavaFX the most common method is through the class MediaPlayer

This is an example, simply define the path of your .mp3 file and you can play the audio without problem:

String path = "C:/Mi Musica/AC_DC/Back in Black/06 Back in Black.mp3";
Media media = new Media(new File(path).toURI().toString());
MediaPlayer mediaPlayer = new MediaPlayer(media);
mediaPlayer.setAutoPlay(true);
MediaView mediaView = new MediaView(mediaPlayer);

There is this way:

import java.io.File;
import java.io.IOException;

import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.DataLine.Info;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.SourceDataLine;
import javax.sound.sampled.UnsupportedAudioFileException;

import static javax.sound.sampled.AudioSystem.getAudioInputStream;
import static javax.sound.sampled.AudioFormat.Encoding.PCM_SIGNED;

public class AudioFilePlayer {

    public static void main(String[] args) {
        final AudioFilePlayer player = new AudioFilePlayer ();
        player.play("something.mp3");
        player.play("something.ogg");
    }

    public void play(String filePath) {
        final File file = new File(filePath);

        try (final AudioInputStream in = getAudioInputStream(file)) {

            final AudioFormat outFormat = getOutFormat(in.getFormat());
            final Info info = new Info(SourceDataLine.class, outFormat);

            try (final SourceDataLine line =
                     (SourceDataLine) AudioSystem.getLine(info)) {

                if (line != null) {
                    line.open(outFormat);
                    line.start();
                    stream(getAudioInputStream(outFormat, in), line);
                    line.drain();
                    line.stop();
                }
            }

        } catch (UnsupportedAudioFileException 
               | LineUnavailableException 
               | IOException e) {
            throw new IllegalStateException(e);
        }
    }

    private AudioFormat getOutFormat(AudioFormat inFormat) {
        final int ch = inFormat.getChannels();

        final float rate = inFormat.getSampleRate();
        return new AudioFormat(PCM_SIGNED, rate, 16, ch, ch * 2, rate, false);
    }

    private void stream(AudioInputStream in, SourceDataLine line) 
        throws IOException {
        final byte[] buffer = new byte[4096];
        for (int n = 0; n != -1; n = in.read(buffer, 0, buffer.length)) {
            line.write(buffer, 0, n);
        }
    }
}

and here this is the reference: