How to convert Mp3 to Amr Audio Format in Java

I'm writing a Java application and I'd like to convert Mp3 to Amr audio format. So, I could'nt success since there are no documentations or libraries to help. if possible, could you any hint about how to process, with examples.

Thanks.

I have found this library called jave you can convert a media format to another format. you can see the library here

Here is a sample code that I did using the said plugin

Encoder encoder = new Encoder();
    EncodingAttributes attributes = new EncodingAttributes();
    attributes.setFormat("wav");
    AudioAttributes audio = new AudioAttributes();
    audio.setBitRate(new Integer(64000));
    audio.setChannels(new Integer(1));
    audio.setSamplingRate(new Integer(22050));
    attributes.setAudioAttributes(audio);

    File source = new File("mysong.mp3");
    File target = new File("mysong.wav");
    try {
        encoder.encode(source, target, attributes);
    } catch (IllegalArgumentException e1) {
        // TODO Auto-generated catch block
        e1.printStackTrace();
    } catch (InputFormatException e1) {
        // TODO Auto-generated catch block
        e1.printStackTrace();
    } catch (EncoderException e1) {
        // TODO Auto-generated catch block
        e1.printStackTrace();
    }

The code I posted basically converts the mp3 to wav