UDP Protocol | Data Communication and Networking | Example

 Client

import java.util.*;

import java.io.*;

import java.net.*;

class Q2_Client{

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

        Scanner scan=new Scanner(System.in);

        DatagramSocket cSocket=new DatagramSocket();

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

        byte[] sdata=new byte[1024];

        byte[] rdata=new byte[1024];

        System.out.println("\nEnter Number : ");

        int st=scan.nextInt();

        String s=String.valueOf(st);

        sdata=s.getBytes();

        DatagramPacket sPacket=new DatagramPacket(sdata, sdata.length, iPAddress, 0614);

        cSocket.send(sPacket);

        DatagramPacket rPacket=new DatagramPacket(rdata, rdata.length);

        cSocket.receive(rPacket);

        String mst=new String(rPacket.getData());

        System.out.println("\nCube of "+st+" is: "+mst);

        cSocket.close();

        scan.close();

    }

}

Server

import java.io.*;

import java.net.*;

class Q2_Server {

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

        DatagramSocket sSocket=new DatagramSocket(0614);

        byte[] sdata=new byte[1024];

        byte[] rdata=new byte[1024];

        while(true){

            DatagramPacket sPacket=new DatagramPacket(rdata, rdata.length);

            sSocket.receive(sPacket);

            String str=new String(sPacket.getData());            

System.out.println("\nConnection Established!!");

            //System.out.println("\nSending Data : "+cube);

            int cube=Integer.parseInt(str.trim());

            cube=cube*cube*cube;

            str=Integer.toString(cube);

            InetAddress iAddress=sPacket.getAddress();

            int port =sPacket.getPort();

System.out.println("\nSending Data : "+cube);

            sdata=str.getBytes();

            DatagramPacket sendPacket=new DatagramPacket(sdata, sdata.length, iAddress, port);

            sSocket.send(sendPacket);

        }

    }

}

Output

TCP Protocol

Prime Number Using TCP Protocol

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