Java Socket Programming

 

To implement communication between Client and Server using the UDP protocol and datagrams

TServer

import java.net.*;

import java.io.*;

import java.util.*;

public class TServer {

public static void main(String[] args) throws Exception{

DatagramSocket ss = new DatagramSocket(1234);

while(true){

System.out.println("Server is up....");

byte[] rd=new byte[100];

byte[] sd=new byte[100];

DatagramPacket rp = new DatagramPacket(rd,rd.length);

ss.receive(rp);

InetAddress ip= rp.getAddress();

int port=rp.getPort();

Date d=new Date(); // getting system time

String time= d + ""; // converting it to String

sd=time.getBytes(); // converting that String to byte

System.out.println(port);

System.out.println(ip);

DatagramPacket sp=new DatagramPacket(sd,sd.length,ip,port);

ss.send(sp);

rp=null;

System.out.println("Done !! ");

}

}

}

 

TClient

import java.net.*;

import java.io.*;

public class TClient {

public static void main(String[] args) throws Exception{

System.out.println("Server Time >>>>");

DatagramSocket cs = new DatagramSocket();

InetAddress ip=InetAddress.getByName("localhost");

byte[] rd=new byte[100];

byte[] sd=new byte[100];

DatagramPacket sp=new DatagramPacket(sd,sd.length,ip,1234);

DatagramPacket rp=new DatagramPacket(rd,rd.length);

System.out.println(ip);

 

cs.send(sp);

cs.receive(rp);

data=new String(rp.getData());

System.out.println(data);

cs.close();

}

}