Computer Network Lab | VTU | Program 8 - UDP Socket Programming

[@roopamam7005]

//UDP Sever
import java.net.*;
import java.net.InetAddress;
class UDPServer
{
public static void main(String args[])throws Exception
{
DatagramSocket serverSocket = new DatagramSocket(9876);
byte[] receiveData=new byte[1024];
byte[] sendData=new byte[1024];
while(true)
{
System.out.println("Server is Up");
DatagramPacket receivePacket=new DatagramPacket(receiveData,receiveData.length);
serverSocket.receive(receivePacket);
String sentence=new String(receivePacket.getData());
System.out.println("RECEIVED:"+sentence);
InetAddress IPAddress=receivePacket.getAddress();
int port=receivePacket.getPort();
String capitalizedSentence=sentence.toUpperCase();
sendData=capitalizedSentence.getBytes();
DatagramPacket sendPacket=new
DatagramPacket(sendData,sendData.length,IPAddress,port);
serverSocket.send(sendPacket);
}
}
}
//UDP Client
import java.io.*;
import java.net.*;
import java.net.InetAddress;
class UDPClient
{
public static void main(String[] args)throws Exception
{
BufferedReader inFromUser=new BufferedReader(new InputStreamReader(System.in));
DatagramSocket clientSocket=new DatagramSocket();
InetAddress IPAddress=InetAddress.getByName("localhost");
byte[] sendData=new byte[1024];
byte[] receiveData=new byte[1024];
System.out.println("Enter the sting to be converted in to Upper case");
String sentence=inFromUser.readLine();
sendData=sentence.getBytes();
DatagramPacket sendPacket=new
DatagramPacket(sendData,sendData.length,IPAddress,9876);
clientSocket.send(sendPacket);
DatagramPacket receivePacket=new DatagramPacket(receiveData,receiveData.length);
clientSocket.receive(receivePacket);
String modifiedSentence=new String(receivePacket.getData());
System.out.println("FROM SERVER:"+modifiedSentence);
clientSocket.close();
}
}

[@gouthamir1807]

While executing on eclipse, I get an error when I run server code saying address already in use, line number 9
Can you help me out mam

[@roopamam7005]

change your Port number!

[@pranav288]

@@gouthamir1807 you my college senior

[@sangeetag7684]

Mam did my exam very well coz of ur videos Thanks :)

[@manjunathsmanju3857]

ಮೇಡಂ transformation of sentence ಬಗ್ಗೆಯೂ ಸ್ವಲ್ಪ ಹೇಳಿಕೊಡಿ, ನೀವು ತುಂಬಾ ಚೆನ್ನಾಗಿ ಅರ್ಥ ಮಾಡುಸ್ತಿರಿ it's my request also 🙏

[@abcdeftanutanu2187]

thank you so much i learnt udp socket programming

[@nirishab8016]

Thank you for this video ma'am.It helped me a lot.
Ma'am can upload the computer networks theory video also...

[@Deemastories]

Thanks a Lot ❤❤🙏🙏🙏mam Really I was in Need With it.

[@archanac2411]

Thank you very much madam its helps me a lots madam

[@VijayKumar-br7ow]

I really appreciate it 👍.

[@chandansharma6849]

Thankyou so much mam😊😊

[@gouthamir1807]

Thanks a lot ma'am

[@captain_8231]

Thank you soo much... Helps a lot✌️

[@hemagowda3313]

Thank you mam pls upload program 9 Tcp/Ip.

[@roopamam7005]

Sure!

[@chandana.bchandana.b8981]

Please put a 5th standered computer lesson mam

[@Dinesh_Kumar23]

Thanks mam

[@jaideeplobo6096]

Mam so much headache for the exam 😭😭😭

[@roopamam7005]

😜

[@jaideeplobo6096]

Mam wether execution is compulsory to pass the exam?
Please reply

[@roopamam7005]

:) According to rules YES! but ofcourse depends on your examiner

[@jaideeplobo6096]

@@roopamam7005 Mam I both program executed in the lab, I'm very happy now, thanks for these videos :)

[@roopamam7005]

Thats great :)