playing sound using java

**sdhilipan89** · March 22nd, 2010, 08:30 AM

hi friends,

i am a beginner in java.i am working on a program to play a sound file.
i used the following code snippet.

import java.applet.*;
import java.awt.event.*;
import java.awt.*;
class SoundExample extends Applet 
{
AudioClip soundFile1;
SoundExample()
{
soundFile1=getAudioClip(getDocumentBase(),"1.au");
soundFile1.play();
}
}
public  class sound_eg
{
public static void main(String args[])
{
SoundExample s=new SoundExample();
System.out.println("Completed");
}
}

the program is compiling successfully.i am getting the following run time errors.
"Exception in thread "main" java.lang.NullPointerException
at java.applet.Applet.getDocumentBase(Applet.java:141 )
at SoundExample.(init)(sound_eg.java:10)
at sound_eg.main(sound_eg.java:18)

i even tried by using a function "init" instead of a constructor.

kindly help me!!![/COLOR]

**helloworld922** · March 22nd, 2010, 07:16 PM

Applets come pre-supplied with a main method. You shouldn't be trying to create an applet separately. Applets also should be initialized in the init() method, not the applet constructor. Try running just your SoundExample class.

**Darryl.Burke** · March 23rd, 2010, 06:35 AM

Or, if all you want is to play a sound in a non-Applet application, use the static method Applet#newAudioClip(URL)

db

**sdhilipan89** · March 23rd, 2010, 07:01 AM

Originally Posted by helloworld922

Applets come pre-supplied with a main method. You shouldn't be trying to create an applet separately. Applets also should be initialized in the init() method, not the applet constructor. Try running just your SoundExample class.

Sir,
i tried as u said,with the following snippet.

import java.applet.*;
import java.awt.event.*;
import java.awt.*;
class SoundExample extends Applet 
{
AudioClip soundFile1;
public void init()
{
soundFile1=getAudioClip(getDocumentBase(),"1.au");
soundFile1.play();
}
}

but i get a runtime error "Exception in thread "main" java.lang.NoSuchMethodError:main

**Darryl.Burke** · March 23rd, 2010, 12:45 PM

First of all, make up your mind whether you want an applet or an application.

Note that Applets/JApplets are NOT executed by invoking java classname.
Lesson: Applets (The Java™ Tutorials > Deployment)

db

**helloworld922** · March 23rd, 2010, 04:16 PM

You must run applets differently than Java applications. If you're using an IDE (such as Eclipse), you have the choice to run a program as an applet or as a Java application.

Otherwise, create a simple HTML that will launch your applet (replace "A" with the name of your applet):

 <html>
 <p> This file launches the 'A' applet: A.class! </p>  
 <applet code="A.class" height=200 width=320>
 No Java?!
 </applet>
 </html>

**sdhilipan89** · March 25th, 2010, 08:59 AM

Originally Posted by Darryl.Burke

First of all, make up your mind whether you want an applet or an application.

Note that Applets/JApplets are NOT executed by invoking java classname.
Lesson: Applets (The Java™ Tutorials > Deployment)

db

sorry to trouble u further brother. Its an application. actually i'm doing my project in java .i want a sound to be played when my output is being displayed. i want a piece of code that could be added in my project to play a sound.its a normal java program using jdk. kindly help me or if u could, pls send me a sample code.

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