Download Playing Audio (Application Example) Java programs can play audio

Playing Audio (Application Example)
Java programs can play audio that is stored in a variety sound file formats.
.aif or .aiff (Macintosh Audio File)
.au (Sun Audio File)
.mid or .rmi (MIDI File)
.wav (Windows Wave File)
Playing audio in a Application differs from playing it in an Applet
AudioClip:
If you need to load a sound file to be played multiple times, use an AudioClip object.
a. The AudioClip interface specifies the following three methods:
 play – plays a sound one time.
 loop – repeatedly plays a sound.
 stop – causes a sound to stop playing.
b. The Applet static method newAudioClip (URL url) – returns an audio clip from the given URL
c. Use URI and URL objects found in java.net package to create the base location
d. If a valid URL cannot be formed a MalformedURLException is thrown. This is found in java.net package.
Notice the constructor and the main method must throw the MalformedURLException if it is not
caught.
import java.applet.*;
import java.net.*;
import java.io.*;
//AudioClip, Applet
// MalformedURLException, URI, URL
//File
try
{
File file = new File("step.wav");
URI uri = file.toURI();
URL url = uri.toURL();
// Create a file object for the step.wav file.
// Get a URI object for the audio file.
// Get a URL for the audio file.
AudioClip sound;
sound = Applet.newAudioClip(url);
//Get an AudioClip object for the sound file
sound.play();
}
catch (MalformedURLException e)
{
System.out.println(“Error playing sound”);
e.printStackTrace();
}
/** This application uses the AudioClip class to play a sound. */
import java.awt.* ; // FlowLayout
import java.applet.*; //AudioClip, Applet
import java.awt.event.*; //ActionListener, ActionEvent
import javax.swing.*; //JFrame, JLabel, JButton;
import java.io.*; //File
import java.net.*; // MalformedURLException, URI, URL
public class AudioFrame extends JFrame
{ private JLabel credit;
// Displays NASA credit
private JButton playButton; // Plays the sound clip
private JButton loopButton; // Loops the clip
private JButton stopButton; // Stops the clip
private AudioClip sound;
// Holds the sound clip
public AudioFrame() throws MalformedURLException
{ setTitle("JFrame Audio Demo");
setDefaultCloseOperation(EXIT_ON_CLOSE);
// Make the credit label and PlayLoop and Stop buttons.
credit = new JLabel("Audio source: NASA");
playButton = new JButton("Play");
loopButton = new JButton("Loop");
stopButton = new JButton("Stop");
// Register an action listener with each button.
playButton.addActionListener(new ButtonListener());
loopButton.addActionListener(new ButtonListener());
stopButton.addActionListener(new ButtonListener());
// Add the buttons to the content pane in a flowLayout
setLayout(new FlowLayout());
add(credit);
add(playButton);
add(loopButton);
add(stopButton);
File file = new File("step.wav");
// Create a file object for the step.wav file.
URI uri = file.toURI();
// Get a URI object for the audio file.
URL url = uri.toURL();
// Get a URL for the audio file.
sound = Applet.newAudioClip(url); //Get an AudioClip object for the sound file
pack();
setVisible(true);
}
private class ButtonListener implements ActionListener
{ public void actionPerformed(ActionEvent e)
{ if (e.getSource() == playButton)
sound.play();
else if (e.getSource() == loopButton)
sound.loop();
else if (e.getSource() == stopButton)
sound.stop();
}
}
public static void main(String[] args) throws MalformedURLException
{ new AudioFrame(); }
}