Google Groups

Re: Help : I want the sound to sound at the left and right of the screen..I also want it to continue forever....but the sound plays 4 times and stop...kindly help


John B. Matthews Nov 7, 2011 9:01 AM
Posted in group: comp.lang.java.help
In article
<bd906c49-fab3-47b0-ad80-82dbdcc3cf9f@g1g2000vbd.googlegroups.com>,
 Michael Adedeji <yank...@gmail.com> wrote:

Consider playing the Clip on another thread, as shown below. Once the
clip is initialized, it's easy to play repeatedly. A Swing Timer may be
convenient, as it's action is called on the event dispatch thread, on
which you have prudently constructed your GUI.

As an aside, watch your indents and line wrap. Also, don't try to put
the entire question in the title.

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Formatter;
import javax.swing.*;
import java.io.File;
import javax.sound.sampled.*;

public class AnimationSound extends JPanel {

    private static final int BOX_WIDTH = 640;
    private static final int BOX_HEIGHT = 480;
    private static final int RATE = 30;
    private File soundFile = new File("beep.wav");
    private Clip clip;
    private float ballRadius = 50;
    private float ballX = 250 - ballRadius;
    private float ballY = 250 - ballRadius;
    private float ballSpeedX = 10;

    public AnimationSound() {
        this.setPreferredSize(new Dimension(BOX_WIDTH, BOX_HEIGHT));
        // Prepare a Clip
        try {
            AudioInputStream audioInputStream =
                AudioSystem.getAudioInputStream(soundFile);
            AudioFormat audioFormat = audioInputStream.getFormat();
            DataLine.Info dataLineInfo =
                new DataLine.Info(Clip.class, audioFormat);
            clip = (Clip) AudioSystem.getLine(dataLineInfo);
            clip.open(audioInputStream);
        } catch (Exception e) {
            e.printStackTrace(System.err);
        }
        Timer timer = new Timer(1000 / RATE, new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e) {
                ballX += ballSpeedX;
                if (ballX - ballRadius < 0) {
                    ballSpeedX = -ballSpeedX;
                    ballX = ballRadius;
                    playSound();
                } else if (ballX + ballRadius > BOX_WIDTH) {
                    ballSpeedX = -ballSpeedX;
                    ballX = BOX_WIDTH - ballRadius;
                    playSound();
                }
                repaint();
            }
        });
        timer.start();
    }

    // Play the sound in a separate thread.
    private void playSound() {
        Runnable soundPlayer = new Runnable() {

            @Override
            public void run() {
                try {
                    clip.setMicrosecondPosition(0);
                    clip.start();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        };
        new Thread(soundPlayer).start();
    }

    @Override
    public void paintComponent(Graphics g) {
        super.paintComponent(g); // Paint background
        g.setColor(Color.BLACK);
        g.fillRect(0, 0, BOX_WIDTH, BOX_HEIGHT);
        g.setColor(Color.GREEN);
        g.fillOval(
            (int) (ballX - ballRadius),
            (int) (ballY - ballRadius),
            (int) (2 * ballRadius), (int) (2 * ballRadius));
        g.setColor(Color.WHITE);
        g.setFont(new Font("Dialog", Font.PLAIN, 12));
        StringBuilder sb = new StringBuilder();
        Formatter formatter = new Formatter(sb);
        formatter.format(
            "Ball @(%3.0f) Speed=(%2.0f)", ballX, ballSpeedX);
        g.drawString(sb.toString(), 20, 30);
    }

    public static void main(String[] args) {
        javax.swing.SwingUtilities.invokeLater(new Runnable() {

            @Override
            public void run() {
                JFrame frame = new JFrame("A Moving Ball");
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.setContentPane(new AnimationSound());
                frame.pack();
                frame.setVisible(true);
            }
        });
    }
}

--
John B. Matthews
trashgod at gmail dot com
<http://sites.google.com/site/drjohnbmatthews>