Hi guys,
thanks to everybody for answering my previous question.
Can anybody help me out with this. it might be a bit off
topic but has images in it.
I am in urgent need of a solution to my problem. I am
working on a multicast project wherein the sender is
sending an image file and the receiver(client) is
downloading bytes from the multicastsocket and displaying
it on a JFrame. I am not working with applets here because
i would initially be developing it as an application. My
sender is in C. it is successfully sending frames(256) of
the image. on the receiving i have written a Java client,
the code for which has been pasted below. I am able to
build the socket but not able to receive packets. somebody
please help me. I can post the C code also if u want. I
have posted comments where the problem lies.
import java.awt.*;
import java.awt.image.*;
import javax.swing.*;
import java.io.*;
import java.net.*;
public class SecondTest extends JFrame {
MulticastSocket msocket;
InetAddress addr;
final static int PORT=12345;
DatagramPacket packet;
Image image;
public SecondTest(String tes) {
setTitle(tes);
byte[] buffer = new byte[256];
try {
addr = InetAddress.getByName("225.0.0.37");
System.out.println("address is" + addr);
msocket = new MulticastSocket(PORT);
msocket.joinGroup(addr);
System.out.println("Created Socket" + msocket);
/* The code does not work beyond this.*/
packet = new DatagramPacket (buffer, buffer.length);
msocket.receive(packet);
/* no packets are being received and hence the following
statement is not printed*/
System.out.println("receiving packet. Size = " +
packet.getLength());
}
catch (Exception e) {
System.out.println("Error!");
e.printStackTrace();
}
System.out.println("The length of buffer is = " +
buffer.length);
image =
Toolkit.getDefaultToolkit().createImage(packet.getData());
MediaTracker tracker = new MediaTracker(this);
tracker.addImage(image, 1);
try {
tracker.waitForAll();
} catch (Exception e) {
image = null;
System.err.println("Can't load image");
}
setSize(500, 400);
setBackground(Color.yellow);
setVisible(true);
}
public void paint(Graphics g) {
if (image != null) {
g.drawImage(image, 50, 50, null);
}
}
}
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