Socket Programming using UDP and TCP/TP--------Write an application to send “hello” message from server to client using UDP.

Aim: - Write an application to send “hello” message from server to client using UDP.

Tools: - NetBeans IDE,  jdk

Program: -

Server.java

package srvr;

import java.io.BufferedReader;

import java.io.InputStreamReader;

import java.net.DatagramPacket;

import java.net.DatagramSocket;

import java.net.InetAddress;

import java.net.UnknownHostException;

public class Srvr {

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

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

        byte data[]=new byte[100];

        int cprt=777,sprt=888;

        InetAddress xn= InetAddress.getLocalHost();

        DatagramPacket dp=new DatagramPacket(data, data.length, xn, cprt);

        DatagramSocket ds=new DatagramSocket(sprt);

        ds.receive(dp);

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

        System.out.print("String  From Client : ");

        System.out.println(s);

    }

}

Client.java

package srvr;

import java.io.BufferedReader;

import java.io.InputStreamReader;

import java.net.DatagramPacket;

import java.net.DatagramSocket;

import java.net.InetAddress;

public class clnt {

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

        byte data[]=new byte[100];

        int cprt=777,sprt=888;

        System.out.print("Enter String : ");

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

        InetAddress xn= InetAddress.getLocalHost();

        String s=br.readLine();

        data=s.getBytes();

        DatagramPacket dp=new DatagramPacket(data, data.length, xn, sprt);

        DatagramSocket ds=new DatagramSocket(cprt);

        ds.send(dp);

        System.out.println("String Sended To Server...");     

    }

}

Output