UDP CHAT SERVER

CLIENT

import java.net.*;

import java.io.*;

class DatagramClient

{

public static DatagramSocket serversocket;

public static DatagramPacket dp;

public static BufferedReader dis;

public static InetAddress ia;

public static byte buffer[]=new byte[1024];

public static int clientport=789,serverport=790;

public static void main(String args[])throws IOException

{

serversocket=new DatagramSocket(clientport);

dp=new DatagramPacket(buffer,buffer.length);

dis=new BufferedReader(new InputStreamReader(System.in));

ia=InetAddress.getLocalHost();

System.out.println(“client is running\ntype’end’ to quit”);

while(true);

{

String str=dis.readLine();

if(str.equals(“end”))

{

System.out.println(“terminated”);

buffer=str.getBytes();

serversocket.send(new DatagramPacket(buffer,str.length(),ia,serverport));

break;

}

buffer=str.getBytes();

serversocket.send(new DatagramPacket(buffer,str.length(),ia,serverport);

serversocket.receive(dp);

String psx=new String(dp.getData(),0,dp.getLength());

System.out.println(“server:”+psx);

}

}

}

SERVER

import java.net.*;

import java.io.*;

class DatagramServer

{

public static DatagramSocket serversocket;

public static DatagramPacket dp;

public static BufferedReader dis;

public static InetAddress ia;

public static byte buffer[]=new byte[1024];

public static int clientport=789,serverport=790;

public static void main(String args[])throws IOException

{

serversocket=new DatagramSocket(clientport);

dp=new DatagramPacket(buffer,buffer.length);

dis=new BufferedReader(new InputStreamReader(System.in));

ia=InetAddress.getLocalHost();

System.out.println(“client is running\ntype’end’ to quit”);

while(true);

{

serversocket.receive(dp);

String psx=new String(dp.getData(),0,dp.getLength());

if(psx.equals(“end”))

{

System.out.println(“client:”+psx);

String str=dis.readLine();

buffer=str.getBytes();

serversocket.send(new DatagramPacket(buffer,str.length(),ia,clientport));

}

}

}