Computer Science 252
Problem Solving with Java

Spring 2014, The College of Saint Rose

SoundPlayerDemo BlueJ Project

Click here to download a BlueJ project for SoundPlayerDemo.

SoundPlayerDemo Source Code

The Java source code for SoundPlayerDemo is below. Click on a file name to download it.

import objectdraw.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;

 * Example SoundPlayerDemo: example of how to use the sound player
 * from
 * This program uses a library called ``JFugue'' from David Koelle to 
 * make music.  Much like objectdraw, this library is not part of a standard
 * Java or BlueJ installation, so you will need to add it.
 * First, visit and download the first
 * file in the list (jfugue-4.0.3.jar).  Save this to your account and then
 * add it to BlueJ's list of libraries.  You can accomplish this by going 
 * into BlueJ's preferences, choosing ``Libraries'', then adding the path to
 * the JFugue library to the list of User Libraries.  After doing this, quit
 * and restart BlueJso it can load the library correctly.
 * Jim Teresco, The College of Saint Rose, CSC 252, Fall 2014
 * $Id: 2329 2014-02-27 02:46:26Z terescoj $

// To use this library, we need an additional import:
import org.jfugue.*;

public class SoundPlayerDemo extends objectdraw.Controller implements ActionListener {

    private JButton playC, playF, playScale, playFrere;

    // The JFugue synthesizer player.
    private Player player = new Player();

    public void begin() {

        // we have no canvas in a Controller (as opposed to a WindowController)
        // so we'll use a different layout manager to get a bunch of buttons
        // we can press 
        Container contentPane = getContentPane();
        contentPane.setLayout(new GridLayout(4,1));

        // and some buttons
        playC = new JButton("Play short C on Contrabass");

        playF = new JButton("Play long F on Flute");

        playScale = new JButton("Play Scale on Piano");

        playFrere = new JButton("Play Frere Jacques");

    public void actionPerformed(ActionEvent e) {

        // see for more about what can go in the
        // "MusicString"s that get passed to these to play music.
        if (e.getSource() == playC) {
   Pattern("I[CONTRABASS] C3i"));
        else if (e.getSource() == playF) {
   Pattern("I[Flute] F4w"));
        else if(e.getSource() == playScale) {
   Pattern("I[Piano] C5w D5w E5w F5w G5w A6w B6w C6w"));
        else {
            // example from
            // "Frere Jacques"
            Pattern pattern1 = new Pattern("C5q D5q E5q C5q");

            // "Dormez-vous?"
            Pattern pattern2 = new Pattern("E5q F5q G5h");

            // "Sonnez les matines"
            Pattern pattern3 = new Pattern("G5i A5i G5i F5i E5q C5q");

            // "Ding ding dong"
            Pattern pattern4 = new Pattern("C5q G4q C5h");

            // Put all of the patters together to form the song
            Pattern song = new Pattern();
            song.add(pattern1, 2); // Adds 'pattern1' to 'song' twice
            song.add(pattern2, 2); // Adds 'pattern2' to 'song' twice
            song.add(pattern3, 2); // Adds 'pattern3' to 'song' twice
            song.add(pattern4, 2); // Adds 'pattern4' to 'song' twice

            // Play the song!