Java

Re: Can a Java application call a DotNet WCF service? Pin

24-Jan-10 18:14

Will give you a general overview
Read 1
Read 2

Richard MacCutchan24-Jan-10 22:23

Audio Files in socket programming. [modified]

24-Jan-10 22:23

You posted this question in three other forums. Please use one forum only for your queries.

MVP 2010 - are they mad?

vidzdas24-Jan-10 2:08

vidzdas

24-Jan-10 2:08

Hello..
I am trying to write a code in socket programming using java that would transfer audio files from 1 destination to another.
I am able to read the audio file successfully using AudioInputStream and AudioSystem methods.
However, i am unable to write back the same file to the destination. The client side does not receive the audio file properly.
Please can u help me? Smile | :)

I was able to successfully transfer a simple text file..but it just doesn't seem to work for audio files..

Thanks n regards..
here is my source code..

Server code

 public class UdpSend1
   {
	   private DatagramSocket socket = null; 
       private DatagramPacket recvPacket, sendPacket; 
       private int hostPort;
    
       public static void main(String args[]) 
       {
    	   
           DatagramSocket socket = null;
           DatagramPacket recvPacket, sendPacket;
           try
           {
               socket = new DatagramSocket();
               InetAddress hostAddress = InetAddress.getLocalHost();
               
               
               File fr = new File("C:\\Taal_Theme.wav");
               AudioInputStream aio = AudioSystem.getAudioInputStream(fr);
               int totalFramesRead = 0;
   			
            	while (socket != null)
            	{ 
            		int bytesPerFrame = aio.getFormat().getFrameSize();
            		if (bytesPerFrame == AudioSystem.NOT_SPECIFIED) 
            		{
            	   
            	    //bytesPerFrame = 1;
            		} 
            	            		int numBytes = 1024 * bytesPerFrame; 
            		byte[] audioBytes = new byte[numBytes];
            	
            		try
            		{
            		    int numBytesRead = 0;
            		    int numFramesRead = 0;
            		    // Try to read numBytes bytes from the file.
            		    while ((numBytesRead = aio.read(audioBytes)) != -1) 	
            	    {
            	      // Calculate the number of frames actually read.
            	      numFramesRead = numBytesRead / bytesPerFrame;
            	      totalFramesRead += numFramesRead;
            	      
            	      
            	      sendPacket = new DatagramPacket(audioBytes, numFramesRead, hostAddress, numFramesRead);
            	      //sendPacket = new DatagramPacket(audioBytes, audioBytes.length, hostAddress, 4545 );
                      socket.send( sendPacket );  
                      recvPacket= new DatagramPacket(new byte[512], 512, hostAddress, 0);
                      socket.receive(recvPacket); 
                      
                      System.out.write(recvPacket.getData(), 0,recvPacket.getLength());
                      System.out.print("\n"); 
            	    }
            	
            	}
            	            	      
                catch (SocketException se)
                {
                	System.out.println("Error in SimpleDatagramClient: " + se);
                }
            }
           }
           catch (IOException ioe)
           {
               System.out.println("Error in SimpleDatagramClient: " + ioe);
           }
           catch (UnsupportedAudioFileException e) 
           {
        	   System.out.println("Error!!! "+e);
			e.printStackTrace();
		}
       }
}

The Client code

   public class UdpReceive1
   {
       public static void main(String args[]) 
       {
           DatagramSocket socket = null;
           DatagramPacket recvPacket, sendPacket;
           
           try
           {
        	   InetAddress hostAddress = InetAddress.getLocalHost();
        	   FileOutputStream fout = new FileOutputStream("C:\\f.wav");
        	   

        	   AudioInputStream aio;
        	   socket = new DatagramSocket(4545);
               while (socket != null)
               { 
            	   System.out.println("HELLO!!!");
            	   recvPacket= new DatagramPacket(new byte[512], 512, 

hostAddress, 0);
                   socket.receive(recvPacket); 
                   System.out.println("HELLO!!!");
                   byte[] str = new byte[512];
                   str = recvPacket.getData();
                   
                   System.out.println(str);
                  
                   ByteArrayInputStream bis = new ByteArrayInputStream(str);
                   System.out.println(bis);
                   aio = new AudioInputStream(bis, null, 512);
                   AudioSystem.write(aio, AudioFileFormat.Type.WAVE, fout);
                   
                   
                  
                   //System.out.write(recvPacket.getData(), 

0,recvPacket.getLength());
                   System.out.print("\n");
                   
                   sendPacket = new DatagramPacket(recvPacket.getData(), 

recvPacket.getLength(),recvPacket.getAddress(),recvPacket.getPort());
                   socket.send( sendPacket );
                   
                  
               } 
           }
           catch (SocketException se)
           {
               System.out.println("Error in DatagramClient: " + se);
           }
           catch (IOException ioe)
           {
               System.out.println("Error in DatagramServer: " + ioe);
           }
       }
   }

modified on Monday, January 25, 2010 9:58 AM

Richard MacCutchan24-Jan-10 2:30

24-Jan-10 2:30

vidzdas wrote:
However, i am unable to write back the same file to the destination. The client side does not receive the audio file properly.

Perhaps you could explain exactly what happens when you try this. There is no real difference in sending a text file or an audio file from one computer to another; a file is just a stream of bytes. It may be that you should read the file as a simple BufferedInputStream rather than using the AudioSystem object.

MVP 2010 - are they mad?

vidzdas24-Jan-10 6:19

vidzdas

24-Jan-10 6:19

Hey thanks..but i already tried that.
A file is created on the other computer but only garbage is displayed. The audio comes as only bytes.
Can u please suggest something else.??

Richard MacCutchan24-Jan-10 9:19

24-Jan-10 9:19

vidzdas wrote:
Hey thanks..but i already tried that.

Uh, tried what?

vidzdas wrote:
A file is created on the other computer but only garbage is displayed. The audio is comes as only bytes.

I don't understand, there is nothing to display from an audio file.

MVP 2010 - are they mad?

427748024-Jan-10 18:15

24-Jan-10 18:15

lol garbage. Try this

Richard MacCutchan24-Jan-10 22:07

24-Jan-10 22:07

4277480 wrote:
Try this

That's what I was suggesting. I wish I had a £ for every time I have tried to get people to understand that a file is merely a stream of bytes, and transferring from one place to another without the need to understand the content is what keeps the entire world running these days.

MVP 2010 - are they mad?

427748024-Jan-10 22:20

24-Jan-10 22:20

haha I know but the thought of sending stream of garbage which is supposed to be an audio file really is an interesting theory Laugh | :laugh:

Richard MacCutchan24-Jan-10 23:10

24-Jan-10 23:10

4277480 wrote:
the thought of sending stream of garbage which is supposed to be an audio file really is an interesting theory

It fits the model of so many issues posted here these days!

btw welcome back, haven't seen input from you for some time.

MVP 2010 - are they mad?

427748024-Jan-10 23:27

24-Jan-10 23:27

Thank you, now I am back to idle mode until the next project, so from time to time I will be referencing here.

san-shiro{701}10-Feb-10 11:43

san-shiro{701}

10-Feb-10 11:43

hey
try to use ObjectInputStream and ObjectOutputStream
am always use it to transfer any type of files.

/*********************************************
* simple FTP(Client Side/upload) *
* Written By : Salah I. Qasem *
* E-mail: tormentor701@hotmail.com *
*********************************************/
import java.io.*;
import java.net.*;

public class Client
{
public static void main(String args[])
{
try{
InputStream file = new FileInputStream("fileName.xxx");
Socket socket = new Socket("127.0.0.1" , 2008);
byte[] bfrArray = new byte[file.available()];
file.read(bfrArray);
ObjectOutputStream obj = new ObjectOutputStream(socket.getOutputStream());
obj.writeObject(bfrArray);
}
catch(Exception ex){System.err.println(ex);}
}
}

/*********************************************
* simple FTP(Server Side/receive) *
* Written By : Salah I. Qasem *
* E-mail: tormentor701@hotmail.com *
*********************************************/
import java.io.*;
import java.net.*;

public class Server
{
public static void main(String args[])
{
try{
ServerSocket serverSocket = new ServerSocket(2008);
Socket socket= serverSocket.accept();
ObjectInputStream input = new ObjectInputStream(socket.getInputStream());
byte[] bfrArray = (byte[])input.readObject();
OutputStream file = new FileOutputStream("newFileName.xxx");
DataOutputStream writer = new DataOutputStream(file);
writer.write(bfrArray);
}
catch(Exception ex)
{
System.err.println(ex);
}
}
}

REG: SSH

sangeethanarayan22-Jan-10 2:08

sangeethanarayan

22-Jan-10 2:08

Hi,
I have to create ssh window.And i've mindterm.jar and following code

<APPLET CODE="com.mindbright.application.MindTerm.class" ARCHIVE="mindterm312.jar?r1" WIDTH=800 HEIGHT=600>

<PARAM NAME="line-space-delta" value="0">
<PARAM NAME="local-echo" value="false">
<PARAM NAME="rev-video" value="false">
<PARAM NAME="ignore-null" value="true">
<PARAM NAME="crlf" value="false">
<PARAM NAME="font-size" value="12">

<PARAM NAME="autowrap" value="true">
<PARAM NAME="delete-send" value="bs">
<PARAM NAME="ascii-line" value="false">
<PARAM NAME="local-pgkeys" value="false">

<PARAM NAME="font-name" value="Monospaced">
<PARAM NAME="visual-bell" value="false">
<PARAM NAME="geometry" value="80x24">
<PARAM NAME="backspace-send" value="del">

<PARAM NAME="paste-button" value="middle">
<PARAM NAME="rev-autowrap" value="false">
<PARAM NAME="passthru-prn-enable" value="true">
<PARAM NAME="copy-select" value="true">

<PARAM NAME="save-lines" value="512">
<PARAM NAME="term-type" value="xterm">
<PARAM NAME="key-mappings" value="">
<PARAM NAME="insert-mode" value="false">

<PARAM NAME="username" value="">
<PARAM NAME="copy-crnl" value="false">
<PARAM NAME="bg-color" value="white">
<PARAM NAME="server" value="apps0.toronto.edu">

<PARAM NAME="print-font-size" value="8">
<PARAM NAME="input-charset" value="none">
<PARAM NAME="repos-output" value="true">
<PARAM NAME="resizable" value="true">

<PARAM NAME="repos-input" value="true">
<PARAM NAME="map-ctrl-space" value="true">
<PARAM NAME="print-font-name" value="Courier">
<PARAM NAME="encoding" value="iso-8859-1">

<PARAM NAME="virtual-kbd" value="">
<PARAM NAME="cursor-color" value="i_blue">
<PARAM NAME="scrollbar" value="right">
<PARAM NAME="auto-linefeed" value="false">

<PARAM NAME="select-delim" value="\"\"">
<PARAM NAME="visible-cursor" value="true">
<PARAM NAME="fg-color" value="black">

</APPLET>

When i run this html, i got ssh window but this following error will occur.

Error connecting to apps0.toronto.edu, reason:
-> access denied (java.net.SocketPermission apps0.toronto.edu resolve)

Is there any bug in applet code? please help me.........

Re: REG: SSH

Richard MacCutchan22-Jan-10 3:59

Problem in SetBoundaryModes with Option Clamp

22-Jan-10 3:59

sangeethanarayan wrote:
Error connecting to apps0.toronto.edu, reason:
-> access denied

Take a look at the message; it would appear that the server at apps0.toronto.edu does not trust you.

MVP 2010 - are they mad?

002comp20-Jan-10 20:32

002comp

20-Jan-10 20:32

Hello Friends
I am applying texture to a object with clamp option means no repetition of that texture to object.

My code is below:

TextureLoader textureLoader = new TextureLoader(textureImage, TextureLoader.GENERATE_MIPMAP);
Texture texture = textureLoader.getTexture();
texture.setBoundaryModeS(Texture.CLAMP);                                    texture.setBoundaryModeT(Texture.CLAMP);
texture.setBoundaryColor(1.0f,0.0f,0.0f,1.0f);

First of all I mapplying a color to opject suppose red then I am applying texture Image without repetition of yellow color.Then I am setting boundary color(red) too as I read in some Docs.
After that the color of that object doesnt remain red.It becomes light yeloow.
Any Ideas??
Thanks In Advance.
Yogesh

implementing term frequency and inverse document frequency in java

Abiodun Modupe19-Jan-10 12:46

Abiodun Modupe

19-Jan-10 12:46

I need to implement the TF-IDF and calculate the cosine value of a document from a file.Please help urgently.

Re: implementing term frequency and inverse document frequency in java

Richard MacCutchan19-Jan-10 22:39