Basic Java Sound Example.

Hi,
Can some one give me a basic java sound application( not applet ) to play a wav file.
Thanks a lot.
zia

I did this search
http://search.java.sun.com/search/java/index.jsp?qp=&nh=10&qt=%2Bplay+%2Bsound+%2Bwav+%2Bapplication&col=jdc&x=14&y=10
looks like the answer should be there somewhere

Similar Messages

Question about Java Sound example?

Hello,
I found this example AudioPlayer, when searching for an example of how to play .wav files in Java.
The code seems quite long, and wondered if anyone could advise if this is the best way to play a wav file?
And could anyone explain if the EXTERNAL_BUFFER_SIZE should allows be set to 128000;
Thank you
import java.io.File;
import java.io.IOException;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.SourceDataLine;
public class SimpleAudioPlayer
     private static final int     EXTERNAL_BUFFER_SIZE = 128000;
     public static void main(String[] args)
            We check that there is exactely one command-line
            argument.
            If not, we display the usage message and exit.
          if (args.length != 1)
               printUsageAndExit();
            Now, that we're shure there is an argument, we
            take it as the filename of the soundfile
            we want to play.
          String     strFilename = args[0];
          File     soundFile = new File(strFilename);
            We have to read in the sound file.
          AudioInputStream     audioInputStream = null;
          try
               audioInputStream = AudioSystem.getAudioInputStream(soundFile);
          catch (Exception e)
                 In case of an exception, we dump the exception
                 including the stack trace to the console output.
                 Then, we exit the program.
               e.printStackTrace();
               System.exit(1);
            From the AudioInputStream, i.e. from the sound file,
            we fetch information about the format of the
            audio data.
            These information include the sampling frequency,
            the number of
            channels and the size of the samples.
            These information
            are needed to ask Java Sound for a suitable output line
            for this audio file.
          AudioFormat     audioFormat = audioInputStream.getFormat();
            Asking for a line is a rather tricky thing.
            We have to construct an Info object that specifies
            the desired properties for the line.
            First, we have to say which kind of line we want. The
            possibilities are: SourceDataLine (for playback), Clip
            (for repeated playback)     and TargetDataLine (for
            recording).
            Here, we want to do normal playback, so we ask for
            a SourceDataLine.
            Then, we have to pass an AudioFormat object, so that
            the Line knows which format the data passed to it
            will have.
            Furthermore, we can give Java Sound a hint about how
            big the internal buffer for the line should be. This
            isn't used here, signaling that we
            don't care about the exact size. Java Sound will use
            some default value for the buffer size.
          SourceDataLine     line = null;
          DataLine.Info     info = new DataLine.Info(SourceDataLine.class,
                                                             audioFormat);
          try
               line = (SourceDataLine) AudioSystem.getLine(info);
                 The line is there, but it is not yet ready to
                 receive audio data. We have to open the line.
               line.open(audioFormat);
          catch (LineUnavailableException e)
               e.printStackTrace();
               System.exit(1);
          catch (Exception e)
               e.printStackTrace();
               System.exit(1);
            Still not enough. The line now can receive data,
            but will not pass them on to the audio output device
            (which means to your sound card). This has to be
            activated.
          line.start();
            Ok, finally the line is prepared. Now comes the real
            job: we have to write data to the line. We do this
            in a loop. First, we read data from the
            AudioInputStream to a buffer. Then, we write from
            this buffer to the Line. This is done until the end
            of the file is reached, which is detected by a
            return value of -1 from the read method of the
            AudioInputStream.
          int     nBytesRead = 0;
          byte[]     abData = new byte[EXTERNAL_BUFFER_SIZE];
          while (nBytesRead != -1)
               try
                    nBytesRead = audioInputStream.read(abData, 0, abData.length);
               catch (IOException e)
                    e.printStackTrace();
               if (nBytesRead >= 0)
                    int     nBytesWritten = line.write(abData, 0, nBytesRead);
            Wait until all data are played.
            This is only necessary because of the bug noted below.
            (If we do not wait, we would interrupt the playback by
            prematurely closing the line and exiting the VM.)
            Thanks to Margie Fitch for bringing me on the right
            path to this solution.
          line.drain();
            All data are played. We can close the shop.
          line.close();
            There is a bug in the jdk1.3/1.4.
            It prevents correct termination of the VM.
            So we have to exit ourselves.
          System.exit(0);
     private static void printUsageAndExit()
          out("SimpleAudioPlayer: usage:");
          out("\tjava SimpleAudioPlayer <soundfile>");
          System.exit(1);
     private static void out(String strMessage)
          System.out.println(strMessage);
}

I didnot go thru the code you posted but I know that the following workstry {
        // From file
        AudioInputStream stream = AudioSystem.getAudioInputStream(new File("audiofile"));
        // From URL
        stream = AudioSystem.getAudioInputStream(new URL("http://hostname/audiofile"));
        // At present, ALAW and ULAW encodings must be converted
        // to PCM_SIGNED before it can be played
        AudioFormat format = stream.getFormat();
        if (format.getEncoding() != AudioFormat.Encoding.PCM_SIGNED) {
            format = new AudioFormat(
                    AudioFormat.Encoding.PCM_SIGNED,
                    format.getSampleRate(),
                    format.getSampleSizeInBits()*2,
                    format.getChannels(),
                    format.getFrameSize()*2,
                    format.getFrameRate(),
                    true);        // big endian
            stream = AudioSystem.getAudioInputStream(format, stream);
        // Create the clip
        DataLine.Info info = new DataLine.Info(
            Clip.class, stream.getFormat(), ((int)stream.getFrameLength()*format.getFrameSize()));
        Clip clip = (Clip) AudioSystem.getLine(info);
        // This method does not return until the audio file is completely loaded
        clip.open(stream);
        // Start playing
        clip.start();
    } catch (MalformedURLException e) {
    } catch (IOException e) {
    } catch (LineUnavailableException e) {
    } catch (UnsupportedAudioFileException e) {
    }

Berkeley DB master-slave replication basic java code example

Hi,
I am new user of berkeley db and I have limited knowledge of Java programming. Can someone help me with basic Java example code of how to do master-slave replication without elections.
Thanx,
Jani

Hello,
Please clarify a few points about your program:
1. What platform and Berkeley DB version are you using?
2. Are you planning on using the replication framework
or base replication API for your application?
3. When you say you want replication without elections,
what exactly does that mean. For example, if you are using
the replication framework elections are held transparently
without any input from your application's code. In this case,
DB will determine which environment is the master and which
are replicas. Is that what you are thinking about or
something else?
Thanks,
Sandra

4 basic java questions..

ok so I already learned Java last year (in grade 11), but my teacher didn't really teach anything, we learnt everything by ourselves from the API... so theres a lot of things I actually don't understand, but for now I want to ask 4 basic questions:
1. What does static mean?
2. Why would u "final" a constant variable? ie. If you have a variable called SIZE which is set to 5, so if u want it to be a constant, just never change its value. But what does the keyword final do to it?
3. What's super? I see it sometimes, and my teacher showed us in the applet exampls to use super.paint(g) or somethign like that for the paint method, but I never use that because I noticed it works fine without it..
4. Whats a question mark? I saw a game that was made in java and it had a lot of places where it had a question mark , which was part of the syntax. For example,
int j1 = i != 0 ? i - 1 : 199;
OR
JUMPVEL = (fSuperSlime) ? 65 : 31;
I really don't understand these lines...
feel free to answer any of these questions...

wow cool...thanks.. that question mark thing is nice
saves a few lines..
now, about super, so u mean u can access the parent
class's variables?Variables, methods, constructors, if the access level is such that it's allowed.
This will be covered in any tutorial or text though.
Sun's basic Java tutorial
Sun's New To Java Center. Includes an overview of what Java is, instructions for setting up Java, an intro to programming (that includes links to the above tutorial or to parts of it), quizzes, a list of resources, and info on certification and courses.
http://javaalmanac.com. A couple dozen code examples that supplement The Java Developers Almanac.
jGuru. A general Java resource site. Includes FAQs, forums, courses, more.
JavaRanch. To quote the tagline on their homepage: "a friendly place for Java greenhorns." FAQs, forums (moderated, I believe), sample code, all kinds of goodies for newbies. From what I've heard, they live up to the "friendly" claim.
Bruce Eckel's Thinking in Java (Available online.)
Joshua Bloch's Effective Java
Bert Bates and Kathy Sierra's Head First Java.
James Gosling's The Java Programming Language. Gosling is
the creator of Java. It doesn't get much more authoratative than this.

Using the 'java.sound.*' libraries and classes

Hello,
I am a complete noob to Java. So please forgive me if I seem a little stupid in the things I ask.
I would like to know which development kit I should download to be able to gain access to the 'java.sound.*' and midi libraries and classes.
I downloaded the Java SE 6 SDK but I could get access to these classes.
I use JCreator as my compiler and I kept getting an error along the lines of 'java.sound.* package does not exist'. I have tried compiling the code with NetBeans and also wiuth Eclipse and I still have no luck and I get the same message. I am guessing the compiler is not the problem and it is the SDK as I can access other classes such as javax.swing and java.awt etc.
If you could give me a link to the relevant SDK and maybe a good compiler, it would be greatly appreciated.
Also I am using Windows XP and Windows Vista so if you could provide me with support for either of these operating systems then that would be great.
Thank You
Lee

Here's the code for an SSCCE (Small Self Contained Compilable Example) of a working java sound application. If you don't provide a file name, It does expect you to have a wave file of Ballroom Blitz in your javatest directory, but doesn't everybody?
To build and run it do:
javac -cp . SoundPlayer.java
java -cp . SoundPlayer yourWaveFile.wav
import java.io.*;
import javax.sound.sampled.*;
import javax.sound.sampled.DataLine.*;
public class SoundPlayer implements LineListener
     private float bufTime;
     private File soundFile;
     private SourceDataLine line;
     private AudioInputStream stream;
     private AudioFormat format;
     private Info info;
     private boolean opened;
     private int frameSize;
     private long frames;
     private int bufFrames;
     private int bufsize;
     private boolean running;
     private boolean shutdown;
     private long firstFrame, lastFrame;
     private float frameRate;
     private long currentFrame;
     private float currentTime;
     private Thread playThread;
     // constructor, take a path to an audio file
     public SoundPlayer(String path)
          this(path, 2);     // use 2 second buffer
     // or a path and a buffer size
     public SoundPlayer(String path, float bt)
          this(new File(path),bt);
     public SoundPlayer(File sf)
          this(sf, 2); // use 2 second buffer
     public SoundPlayer(File sf, float bt)
          bufTime = bt;          // seconds per buffer
          soundFile = sf;
          openSound();
     private void openSound()
          System.out.println("Opening file"+soundFile.getName());
          try
               firstFrame = 0;
               currentFrame = 0;
               shutdown = false;
               running = false;
               stream=AudioSystem.getAudioInputStream(soundFile);
               format=stream.getFormat();
               if(format.getEncoding() != AudioFormat.Encoding.PCM_SIGNED)
                    System.out.println("Converting Audio stream format");
                    stream = AudioSystem.getAudioInputStream(AudioFormat.Encoding.PCM_SIGNED,stream);
                    format = stream.getFormat();
               frameSize = format.getFrameSize();
               frames = stream.getFrameLength();
               lastFrame = frames;
               frameRate = format.getFrameRate();
               bufFrames = (int)(frameRate*bufTime);
               bufsize = frameSize * bufFrames;
               System.out.println("frameRate="+frameRate);
               System.out.println("frames="+frames+" frameSize="+frameSize+" bufFrames="+bufFrames+" bufsize="+bufsize);
               info=new Info(SourceDataLine.class,format,bufsize);
               line = (SourceDataLine)AudioSystem.getLine(info);
               line.addLineListener(this);
               line.open(format,bufsize);
               opened = true;
          catch(Exception e)
               e.printStackTrace();
     public void stop()
          System.out.println ("Stopping");
          if(running)
               running = false;
               shutdown = true;
               if(playThread != null)
                    playThread.interrupt();
                    try{playThread.join();}
                    catch(Exception e){e.printStackTrace();}
          if (opened) close();
     private void close()
          System.out.println("close line");
          line.close();
          try{stream.close();}catch(Exception e){}
          line.removeLineListener(this);
          opened = false;
     // set the start and stop time
     public void setTimes(float t0, float tz)
          currentTime = t0;
          firstFrame = (long)(frameRate*t0);
          if(tz > 0)
               lastFrame = (long)(frameRate*tz);
          else lastFrame = frames;
          if(lastFrame > frames)lastFrame = frames;
          if(firstFrame > lastFrame)firstFrame = lastFrame;
     public void playAsync(float start, float end)
          setTimes(start,end);
          playAsync();
     // play the sound asynchronously */
     public void playAsync()
          System.out.println("Play async");
          if(!opened)openSound();
          if(opened && !running)
               playThread = new Thread(new Runnable(){public void run(){play();}});
               playThread.start();
     public void play(float start, float end)
          setTimes(start,end);
          play();
     // play the sound in the calling thread
     public void play()
          if(!opened)openSound();
          if(opened && !running)
               running = true;
               int writeSize = frameSize*bufFrames/2; // amount we write at a time
               byte buf[] = new byte[writeSize];     // our io buffer
               int len;
               long framesRemaining = lastFrame-firstFrame;
               int framesRead;
               currentFrame=firstFrame;
               System.out.println("playing file, firstFrame="+firstFrame+" lastFrame="+lastFrame);
               try
                    line.start();
                    if(firstFrame > 0)
                         long sa = firstFrame * frameSize;
                         System.out.println("Skipping "+firstFrame+" frames="+sa+" bytes");
                         while(sa > 0)sa -= stream.skip(sa);
                    while (running && framesRemaining > 0)
                         len = stream.read(buf,0,writeSize); // read our block
                         if(len > 0)
                              framesRead = len/frameSize;
                              framesRemaining -= framesRead;
                              currentTime = currentFrame/frameRate;
                              if(currentTime < 0)throw(new Exception("time too low"));
                              System.out.println("time="+currentTime+" writing "+len+" bytes");
                              line.write(buf,0,len);
                              currentFrame+=framesRead;
                         else framesRemaining = 0;
                    if(running)
                         line.drain();                     // let it play out
                         while(line.isActive() && running)
                              System.out.println("line active");
                              Thread.sleep(100);
                         shutdown = true;
                    running = false;
               catch(Exception e)
                    e.printStackTrace();
                    shutdown = true;
                    running = false;
               if(shutdown)
                    close();
     // return current time relative to start of sound
     public float getTime()
          return ((float)line.getMicrosecondPosition())/1000000;
     // return total time
     public float getLength()
          return (float)frames / frameRate;
     // stop the sound playback, return time in seconds
     public float pause()
          running = false;
          line.stop();
          return getTime();
     public void update(LineEvent le)
          System.out.println("Line event"+le.toString());
     // play a short simple PCM encoded clip
     public static void playShortClip(String fnm)
          java.applet.AudioClip clip=null;
          try
               java.io.File file = new java.io.File(fnm);     // get a file for the name provided
               if(file.exists())                    // only try to use a real file
                    clip = java.applet.Applet.newAudioClip(file.toURL()); // get the audio clip
               else
                    System.out.println("file="+fnm+" not found");
          catch(Exception e)
               System.out.println("Error building audio clip from file="+fnm);
               e.printStackTrace();
          if(clip != null)     // we may not actually have a clip
               final java.applet.AudioClip rclip = clip;
               new Thread
               (new Runnable()
                         public void run()
                              rclip.play();
               ).start();
     public boolean isOpened()
          return opened;
     public boolean isRunning()
          return running;
    public void showControls() {
        Control [] controls = line.getControls();
        for (Control c :controls) {
            System.out.println(c.toString());
    public void setGain(float gain) {
        FloatControl g = (FloatControl) line.getControl(FloatControl.Type.MASTER_GAIN);
        g.setValue(gain);
    public static void main(String [] args) {
        float gain = 0;
        String file = "c:\\javatest\\BallroomBlitz.wav";
          for(String arg : args) {
            for(int i = 0; i < arg.length(); i++) {
                char c = arg.charAt(i);
                if (c == '-') {
                    gain -= 1;
                } else if (c == '+') {
                    gain += 1;
                } else {
                         file = arg;
        SoundPlayer sp = new SoundPlayer(file);
        sp.showControls();
        System.out.println("setting gain to " + gain);
        sp.setGain(gain);
        sp.play();
}

Making some basic Java games

Can anyone help on how to make some basic java games for my website if you could that would be helpful
thanks,
Louie

Well, first of all you program the Framework, add Graphics / sounds / Data , then you put it in your HP - There you are!

Basic Java Class with prints records out of the DEPT table

Can some one show a basic java class which will query the DEPT table, and print them out?

Nagarjuna,
the Oracle DBMS JDBC Developer's Guide is full of code examples.
http://download.oracle.com/docs/cd/B19306_01/java.102/b14355/toc.htm
--olaf

Audio capture delayed with Java Sound and JWS

Hi.
I am experiencing quite a strange problem with Java Sound in my Java Web Start application. I am acquiring sound from the microphone through Java Sound, using a code which looks like this:
==============================
AudioFormat audioFormat = new AudioFormat(11025, 8, 1, true, false);
// Get a TargetDataLine from the appropriate mixer
DataLine.Info dataLineInfo = new DataLine.Info(TargetDataLine.class, audioFormat);
TargetDataLine targetDataLine = (TargetDataLine) AudioSystem.getLine(dataLineInfo);
// Prepare the line for use
targetDataLine.open(audioFormat);
targetDataLine.start();
targetDataLine.addLineListener(myLineListener);
// Build an input stream from the line
AudioInputStream audioInStream = new AudioInputStream(targetDataLine);
// Create the output file
File outputFile = new File("C:\\MySampleAudioFile.wav");
// Start the actual audio file-writing operation
AudioFileFormat.Type targetFileFormatType = AudioFileFormat.Type.WAVE;
AudioSystem.write(audioInStream, targetFileFormatType, outputFile);
==============================
This code is executed in an independent thread. As you can see from the code reported above, I add a LineListener to my TargetDataLine.
The problem is that in my JWS application several seconds (about 5-6 seconds) elapse from the call to AudioSystem.write() and the reception of the START LineEvent on my LineListener. This delay only occurs when my JWS application is downloaded from my public internet website, while it is not present when I test my JWS application on my local LAN server.
It looks like the call to AudioSystem.write() causes some kind of network connection to the remote web server of the JWS app, and this operation takes some time. In fact, if I download my JWS app to my client from the public web server, then I disable all network connections on my client, then the START event is received immediately after the call to AudioSystem.write()... This is STRANGE, isn't it???
Do you believe the call to AudioSystem.write(), or any other Java Sound call, may cause a network connection to the server from which the JWS application has been downloaded?
A final addition to the above picture: I also have a "Java Applet" version of this application, which is exactly identical to the JWS version and uses the same exact code to do audio acquisition from the microphone. But, in this case the delay is not present, even when running the applet from the public web server!
Any help / suggestion would be highly appreciated.
Best regards,
Marco.

Hi
Just Visit the following link and download sample source code for rtp in java
http://javasolution.blogspot.com/2007/04/rtp-using-java.html
if u want know basic simple java voice chat then visit
http://javasolution.blogspot.com/2007/04/voice-chat-using-java.html

Simple Java Sound Question...

Can I draw waveforms while capturing data? If yes, how. If no, why.
Thanks. I need the answer ASAP, please help.

Hi nfactorial,
Can I draw waveforms while capturing data?If you would like to do that in Java you would need to know about how to use the Java language in general and especially about the Java Sound and Java2D APIs.
If yes, how.It would be too much to explain to answer such a general question. A general answer is, you need to use the Java Sound API to capture the data for which a waveform should be drawn. The Sound API delivers data as a stream of bytes typically encoded in pulse coded modulation (PCM) format. The data stream has digital samples each representing a level of sound pressure for a certain point in time. The stream of samples in the amplitude/time domain need to be transformed to a spectrum of samples in the amplitude/frequency domain, i.e. a number of PCM samples need to be mapped to the frequencies that should be displayed. This is done with the fast fourier transformation algorithm. Each set of amplitude/frequency values can then be displayed as a waveform by using some line drawing logic. The entire process would need to run constantly, i.e. as bytes are received from the sound data stream transformation and drawing is triggered.
Related readings:
Java Tutorial
http://java.sun.com/docs/books/tutorial/
Java Sound Documentation
http://java.sun.com/j2se/1.5.0/docs/guide/sound/index.html
Java Sound API Programmer's Guide
http://java.sun.com/j2se/1.5.0/docs/guide/sound/programmer_guide/contents.html
Java Sound Resources
http.//www.jsresources.org
Java 2D Graphics Tutorial
http://java.sun.com/docs/books/tutorial/2d/index.html
Wikipedia on fast fourier transformation
http://en.wikipedia.org/wiki/Fast_fourier_transform
HTH
Ulrich

How to implement effects in java sound

I have read the programmer's guide in java sound and it said there that it can generate effects such as distortion, delay and others. I would like to implement some of those, I can already capture and play sound from a microphone but I don't know how to manipulate the data to get my desired effect. Can someone explain the content of the array of bytes? I also hope you can give me some hints or anything that could help me implement my own effect. Thanks in advance!

going_infinity wrote:
The contents of the double array do not exceed the range. They are mostly of -0.07 o 0.07.
I forgot to post this code, this is how byte was transformed to a double array. I am just extending an existing codeAh, yes...that makes a lot more sense. I assumed you were reading from the line as double, and that wouldn't work. But you're already converting it, which is why everything stays in the range you'd expect.
"Weirdness" solved.
If I use the double array or the byte array, how can I implement some effects like echo or reverb? I understand that since the "raw data" provides amplitude, I can get it's frequency and there is some FFT involved. All I can see here is determining the pitch of the sound but still, no effects. I'm still confused on where to start. Well, it depends on the effect. I'm not an effects expert, so you'll probably want to go do some Google-ing for what all of the affects are...but I think I can explain an echo.
Echo is a function of a variable, decay, which is how quickly an echo will fade away. From a physics perspective, think of decay as friction, it'll eventually stop a moving object.
So, you might implement an echo kinda like the following
for (int i = 0; i < buffer.length; i++) {
     double threshhold = 0.01;
     double decay = 0.5;
     double echo = sample;
     int j = i+1;
     while((Math.abs(echo) > threshhold) && (j < buffer.length)) {
          buffer[j++] += echo;
          echo *= decay;
Where some decreasing-fraction of a sample is added to all samples in the future until it drops below some threshhold.
That may or may not be an "echo" effect, necessarily, as I think that a "true" echo also has a peroid (the delay between the sound and its echo) that I'm not taking into effect, so that effect is probably more like overdrive...but it illistrates the point. You'll have to figure out what each effect "adds" or "subtracts" from the sound, and then loop-through the sound data sequentially adding the effects of the effect.

Simple Java DB example

I am using Java 1.6 and Eclipse Galelio on Vista, Do I need to configure anything is there any story of setting path?
How to check my Java DB is working or not or everything is fine or not?
I found many totorial with simple Java DB example but they seem dealing with previous version of JDK, I guess SUN too on http://java.sun.com/developer/technicalArticles/J2SE/Desktop/javadb/ , kindly provide me the simplest example which uses Java DB.
I am not able to figure out the whole thing of JAVA DB , how it works, in plain language I want to know is there any way of interacting with database from Command prompt? If so how?

When I am running a simpleApp.java
I am getting this error:
Unable to load the JDBC driver org.apache.derby.jdbc.EmbeddedDriver
Please check your CLASSPATH.
java.lang.ClassNotFoundException: org.apache.derby.jdbc.EmbeddedDriver
     at java.net.URLClassLoader$1.run(Unknown Source)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.net.URLClassLoader.findClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at java.lang.Class.forName0(Native Method)
     at java.lang.Class.forName(Unknown Source)
     at SimpleApp.loadDriver(SimpleApp.java:414)
     at SimpleApp.go(SimpleApp.java:125)
     at SimpleApp.main(SimpleApp.java:93)
----- SQLException -----
SQL State: 08001
Error Code: 0
Message: No suitable driver found for jdbc:derby:derbyDB;create=true
SimpleApp starting in embedded mode
SimpleApp finished

Basic java comparision

Hi..
I have a basic JAVA problem..can anyone help on this.
I have a constant declared in a EMPConstanta.java
public static String HISTORICAL = "historical";
In another java class..i need to compare 2 strings..
String statusType = req.getParameter("historical"); //this vale comes from JSP hidden parameter and the value of statusType is historical
Now I want to compare with constant vale.. and I am doing like this..
if(statusType.equals( ASMConstants.HISTORICAL)){
statusType = ASMConstants.CURRENT;
Problem is both the values are historical�but it is not entering to if condition..any suggestions

http://forum.java.sun.com/thread.jspa?threadID=5203921&tstart=0
avoid multi post

How to get / view Java Sound source code

Hi All,
I'm curious to view the Java Sound source code, is that possible? Let me know what I have done so far,
1. In eclipse I have mapped the src.zip from the JDK directory, now I am able to view most of the source code.
2. When I try to view AudioSystem.getProviders method it returns value from JDK13Services.getProviders
But I dont have source code for JDK13Services class, indeed i don't have com.sun.media package source code, in the src.zip
Do anyone know how to get com.sun.media package source code?
Thanks in advance,
Karthikeyan R

It appears that the 3rd entry of this search
[http://www.google.com/search?q=JDK13Services]
give both the javadoc and source for JDK13Services, as follows:
[http://www.docjar.org/docs/api/com/sun/media/sound/JDK13Services.html]
The other search listings appear to contain useful information, also.

Where can i get a e-book on java sound?

I want to know where i can download a ebook on java sound.

[http://java.sun.com/j2se/1.5.0/docs/guide/sound/programmer_guide/contents.html]

UML diagrams for Java petstore example

Hi,
In this forum and elsewhere I've notice requests for the UML diagrams for the java petstore example. I've posted some uml diagrams at
http://weblog.neeraj.name/weblog/2004/9/9/java-petstore-uml-diagrams.html
Your comments are welcome.
thanks.
- Neeraj
http://weblog.neeraj.name

Hi,
I browsed through some of your UML. Its a great start! Would you be interested in starting a project on java.net and hosting your uml there? We now have the BluePrints projects out on java.net https://blueprints.dev.java.net/ and would like to encourage others to add their projects as well.
Lots of people have done cool stuff with Java Petstore and other blueprints projects, and lots of people have created additions to these projects. These UML diagrams would seem to be a great addition to the J2EE community on java.net http://community.java.net/java-enterprise/.
Its easy to join java.net and to create a new project. They give you a cvs repository where you can store your uml diagrams. We could include a reference to it from the blueprints since it is really useful supplemental material. By making it a project as part of the J2EE community on java.net it makesd it accessible to a larger audience of people. Not everyone will read this forum, and lots more people might find your project useful. So if you wish we had more UML for the Petstore, ....then now is your chance to make a difference :-) Maybe a project called UML4Petstore?
This page has some explanations of how to add a project if interested.
https://java-enterprise.dev.java.net/
hope that helps,
Sean

Basic Java Sound Example.

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