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Practical No 17

The document contains a program to demonstrate the use of DatagramPacket and DatagramSocket to create a chat application. The program contains a server side and client side code. The server side code creates a DatagramSocket to listen on port 2019 and receives and sends DatagramPackets. The client side code creates a DatagramSocket and sends and receives DatagramPackets to communicate with the server. The programs allow sending messages between the client and server in a loop.

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958 views4 pages

Practical No 17

The document contains a program to demonstrate the use of DatagramPacket and DatagramSocket to create a chat application. The program contains a server side and client side code. The server side code creates a DatagramSocket to listen on port 2019 and receives and sends DatagramPackets. The client side code creates a DatagramSocket and sends and receives DatagramPackets to communicate with the server. The programs allow sending messages between the client and server in a loop.

Uploaded by

nstrnsdtn
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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Name:- Ayush Maroti Wadje class:-CO5I

Roll No:-76

PRACTICAL 17: WRITE A PROGRAM TO DEMONSTRATE USE


OF DATAGRAMSOCKET AND DATAGRAM PACKET

1) Write a program using DatagramPacket and DatagramSocket to create chat application


Ans:
ServerSideData.java:
import java.net.*;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class ServerSideData


{
public static void main(String[] args) throws IOException {
DatagramSocket ds = new DatagramSocket(2019);

byte[] receiveData = new byte[512];


byte[] sendData = new byte[512];

BufferedReader br = new BufferedReader(


new InputStreamReader(System.in)
);

System.out.println(" UDP Server Socket is created, waiting for client ");

do
{
DatagramPacket receiveDP = new DatagramPacket(receiveData,receiveData.length);
ds.receive(receiveDP);

String clientMessage = new String(receiveDP.getData(),0,receiveDP.getLength());


System.out.println("Client Message:"+clientMessage);

InetAddress ip = receiveDP.getAddress();

System.out.print("\n\nEnter Server Message:");


String serverMessage = br.readLine();
sendData = serverMessage.getBytes();
DatagramPacket sendDP = new DatagramPacket(sendData, sendData.length, ip,
receiveDP.getPort());
ds.send(sendDP);
receiveData = new byte[512];
}while(true);
}
}

ClientSideData:-
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.*;

public class ClientSideData


{
public static void main(String[] args) throws IOException {
DatagramSocket ds = new DatagramSocket();

byte[] receiveData = new byte[512];


byte[] sendData = new byte[512];

BufferedReader br = new BufferedReader(


new InputStreamReader(System.in)
);

System.out.println(" UDP Client Socket is created, waiting for server ");

InetAddress ip = InetAddress.getLocalHost();

do
{
System.out.print("\nEnter Client Message:");
String clientMessage = br.readLine();
sendData = clientMessage.getBytes();

DatagramPacket sendDP = new DatagramPacket(sendData, sendData.length, ip, 2019);

ds.send(sendDP);

DatagramPacket receiveDP = new DatagramPacket(receiveData,receiveData.length);


ds.receive(receiveDP);

String serverMessage = new String(receiveDP.getData(),0,receiveDP.getLength());

System.out.println("\n\nServer Message:"+serverMessage);
}while(true);

}
}

Output:-
`
2) Write a program using DatagramPacket and DatagramSocket to copy the contents of one
file into other.

Ans:-
ServerFile.java:

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