Java MP3 Player Source Code

[Nipuna]

Description:
This example shows how to create a MP3 Player in Java. It uses JMF (Java Media Framework) to do this.


Example Code:
Following code plays MP3 files. Please make sure you have jmf.jar file in your classpath.

Code: Select all

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.File;

import javax.media.ControllerEvent;
import javax.media.ControllerListener;
import javax.media.Manager;
import javax.media.Player;
import javax.media.RealizeCompleteEvent;
import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JOptionPane;

public class MediaPlayerDemo extends JFrame {
    private Player player;

    private File file;

    public MediaPlayerDemo() {
        super("Demonstrating the Java Media Player");

        JButton openFile = new JButton("Open file to play");
        openFile.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                openFile();
                createPlayer();
            }
        });
        getContentPane().add(openFile, BorderLayout.NORTH);

        setSize(300, 300);
        show();
    }

    private void openFile() {
        JFileChooser fileChooser = new JFileChooser();

        fileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY);
        int result = fileChooser.showOpenDialog(this);

        // user clicked Cancel button on dialog
        if (result == JFileChooser.CANCEL_OPTION)
            file = null;
        else
            file = fileChooser.getSelectedFile();
    }

    private void createPlayer() {
        if (file == null)
            return;

        removePreviousPlayer();

        try {
            // create a new player and add listener
            player = Manager.createPlayer(file.toURL());
            player.addControllerListener(new EventHandler());
            player.start(); // start player
        } catch (Exception e) {
            JOptionPane.showMessageDialog(this, "Invalid file or location",
                    "Error loading file", JOptionPane.ERROR_MESSAGE);
        }
    }

    private void removePreviousPlayer() {
        if (player == null)
            return;

        player.close();

        Component visual = player.getVisualComponent();
        Component control = player.getControlPanelComponent();

        Container c = getContentPane();

        if (visual != null)
            c.remove(visual);

        if (control != null)
            c.remove(control);
    }

    public static void main(String args[]) {
        MediaPlayerDemo app = new MediaPlayerDemo();

        app.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
    }

    // inner class to handler events from media player
    private class EventHandler implements ControllerListener {
        public void controllerUpdate(ControllerEvent e) {
            if (e instanceof RealizeCompleteEvent) {
                Container c = getContentPane();
                c.setBackground(new Color(255, 255, 204));

                // load Visual and Control components if they exist
                Component visualComponent = player.getVisualComponent();

                if (visualComponent != null)
                    c.add(visualComponent, BorderLayout.CENTER);
                c.setBackground(new Color(255, 255, 204));
                Component controlsComponent = player.getControlPanelComponent();

                if (controlsComponent != null)
                    c.add(controlsComponent, BorderLayout.SOUTH);

                c.doLayout();
            }
        }
    }
}