Question

I need to create a JavaFx media player "code" with a "10 song" playlist and a cover to each song. ("I am using Net beans and Eclipse to write my codes) The codes will need pause/stop/play buttons. All the bells and whistles to make a outstanding final project.

Answer 1

1. Create an object of AudioInputStream by using AudioSystem.getAudioInputStream(File file). AudioInputStream converts an audio file into stream.
2. Get a clip reference object from AudioSystem.
3. Stream an audio input stream from which audio data will be read into the clip by using open() method of Clip interface.
4. Set the required properties to the clip like frame position, loop, microsecond position.
5. Start the clip

code:

// Java program to play an Audio

// file using Clip Object

import java.io.File;

import java.io.IOException;

import java.util.Scanner;

  

import javax.sound.sampled.AudioInputStream;

import javax.sound.sampled.AudioSystem;

import javax.sound.sampled.Clip;

import javax.sound.sampled.LineUnavailableException;

import javax.sound.sampled.UnsupportedAudioFileException;

  

public class SimpleAudioPlayer

{

  

    // to store current position

    Long currentFrame;

    Clip clip;

      

    // current status of clip

    String status;

      

    AudioInputStream audioInputStream;

    static String filePath;

  

    // constructor to initialize streams and clip

    public SimpleAudioPlayer()

        throws UnsupportedAudioFileException,

        IOException, LineUnavailableException

    {

        // create AudioInputStream object

        audioInputStream =

                AudioSystem.getAudioInputStream(new File(filePath).getAbsoluteFile());

          

        // create clip reference

        clip = AudioSystem.getClip();

          

        // open audioInputStream to the clip

        clip.open(audioInputStream);

          

        clip.loop(Clip.LOOP_CONTINUOUSLY);

    }

  

    public static void main(String[] args)

    {

        try

        {

            filePath = "Your path for the file";

            SimpleAudioPlayer audioPlayer =

                            new SimpleAudioPlayer();

              

            audioPlayer.play();

            Scanner sc = new Scanner(System.in);

              

            while (true)

            {

                System.out.println("1. pause");

                System.out.println("2. resume");

                System.out.println("3. restart");

                System.out.println("4. stop");

                System.out.println("5. Jump to specific time");

                int c = sc.nextInt();

                audioPlayer.gotoChoice(c);

                if (c == 4)

                break;

            }

            sc.close();

        }

          

        catch (Exception ex)

        {

            System.out.println("Error with playing sound.");

            ex.printStackTrace();

          

          }

    }

      

    // Work as the user enters his choice

      

    private void gotoChoice(int c)

            throws IOException, LineUnavailableException, UnsupportedAudioFileException

    {

        switch (c)

        {

            case 1:

                pause();

                break;

            case 2:

                resumeAudio();

                break;

            case 3:

                restart();

                break;

            case 4:

                stop();

                break;

            case 5:

                System.out.println("Enter time (" + 0 +

                ", " + clip.getMicrosecondLength() + ")");

                Scanner sc = new Scanner(System.in);

                long c1 = sc.nextLong();

                jump(c1);

                break;

      

        }

      

    }

      

    // Method to play the audio

    public void play()

    {

        //start the clip

        clip.start();

          

        status = "play";

    }

      

    // Method to pause the audio

    public void pause()

    {

        if (status.equals("paused"))

        {

            System.out.println("audio is already paused");

            return;

        }

        this.currentFrame =

        this.clip.getMicrosecondPosition();

        clip.stop();

        status = "paused";

    }

      

    // Method to resume the audio

    public void resumeAudio() throws UnsupportedAudioFileException,

                                IOException, LineUnavailableException

    {

        if (status.equals("play"))

        {

            System.out.println("Audio is already "+

            "being played");

            return;

        }

        clip.close();

        resetAudioStream();

        clip.setMicrosecondPosition(currentFrame);

        this.play();

    }

      

    // Method to restart the audio

    public void restart() throws IOException, LineUnavailableException,

                                            UnsupportedAudioFileException

    {

        clip.stop();

        clip.close();

        resetAudioStream();

        currentFrame = 0L;

        clip.setMicrosecondPosition(0);

        this.play();

    }

      

    // Method to stop the audio

    public void stop() throws UnsupportedAudioFileException,

    IOException, LineUnavailableException

    {

        currentFrame = 0L;

        clip.stop();

        clip.close();

    }

      

    // Method to jump over a specific part

    public void jump(long c) throws UnsupportedAudioFileException, IOException,

                                                        LineUnavailableException

    {

        if (c > 0 && c < clip.getMicrosecondLength())

        {

            clip.stop();

            clip.close();

            resetAudioStream();

            currentFrame = c;

            clip.setMicrosecondPosition(c);

            this.play();

        }

    }

      

    // Method to reset audio stream

    public void resetAudioStream() throws UnsupportedAudioFileException, IOException,

                                            LineUnavailableException

    {

        audioInputStream = AudioSystem.getAudioInputStream(

        new File(filePath).getAbsoluteFile());

        clip.open(audioInputStream);

        clip.loop(Clip.LOOP_CONTINUOUSLY);

    }

  

}

In above program we have used AudioInputStream which is a class in Java to read audio file as a stream. Like every stream of java if it is to be used again it has to be reset.

• To pause the playback we have to stop the player and store the current frame in an object. So that while resuming we can use it. When resuming we just have to play again the player from the last position we left.
  clip.getMicrosecondPosition() method returns the current position of audio and clip.setMicrosecondPosition(long position) sets the current position of audio.
• To stop the playback, you must have to close the clip otherwise it will remain open. I have also used clip.loop(Clip.LOOP_CONTINOUSLY) for testing. Because wav files are generally small so I have played mine in a loop.