How to speed up or slow down music tempo?

Question

hi all, I am hoping someone could do me a favor like telling me how to adjust music tempo by java...I mean how to speed up or slow down music tempo by Java programming?
Thx a lot :-)

Answer 1

Actually, I want to change the speed of songs with formats like .wav and mp3. But I can't find the correct way to do that, and even it seems not to play all kinds of .wav music when I use the code as below. Sometimes when I play some other .wav music ,it just generates some fuzzy sounds.
import java.io.FileInputStream;
import sun.audio.AudioStream;
import sun.audio.AudioPlayer;
public class Main {
public Main() throws Exception {
FileInputStream fileInputStream = new FileInputStream("C:\\WINDOWS\\Media\\tada.wav");
AudioStream audioStream = new AudioStream(fileInputStream);
AudioPlayer.player.start(audioStream);
Thread.sleep(5000);
fileInputStream = new FileInputStream("C:\\WINDOWS\\Media\\tada.wav");
audioStream = new AudioStream(fileInputStream);
AudioPlayer.player.start(audioStream);
public static void main(String[] args) throws Exception {
     new Main();
}