Slip 3 - A) Write a socket program in Java to check whether given number is prime or not. Display result on client terminal.

Solution:

Server code:

package IshaPro;

import java.io.DataInputStream;

import java.io.DataOutputStream;

import java.net.ServerSocket;

import java.net.Socket;

class IshaPrimeServer    

{

public static void main(String args[])      

{

  try{

      ServerSocket ss = new ServerSocket(8420);   

      //Print server is started

      System.out.println("Server Started...............");

      //Accept method

      Socket s = ss.accept();

      //For accepting characters take information

      DataInputStream in = new DataInputStream(s.getInputStream()); 

      //Store the number in x variable

      int x = in.readInt(); 

      //To print information Characters UTC Encoded

      DataOutputStream otc = new DataOutputStream(s.getOutputStream());

      int flag=0;    //store in y variable

      

      for(int i = 2; i < x; i++)

      { 

        if(x % i == 0)  

        { 

          flag=1;

          //otc.writeUTF(x + " is Prime");

        }

      } 

      if(flag==0) {

        otc.writeUTF(x + " is Prime");

      }

      else

      {

        otc.writeUTF(x + " is not Prime");

      }

    } catch(Exception e)  //Catch your exception

    {

      System.out.println(e.toString());

    }

  }

}

Client code:

package IshaPro;

import java.io.BufferedReader;

import java.io.DataInputStream;

import java.io.DataOutputStream;

import java.io.InputStreamReader;

import java.net.Socket;

class IshaPrimeClient 

{

    public static void main(String args[])   

    {

        try

        {

            Socket cs = new Socket("LocalHost", 8420); 

            

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

            System.out.println("Enter a number : ");

            int a = Integer.parseInt(infu.readLine());  

            DataOutputStream out = new DataOutputStream(cs.getOutputStream());   

            out.writeInt(a);

            DataInputStream in = new DataInputStream(cs.getInputStream()); 

            

            System.out.println(in.readUTF());

            

            cs.close();          }

        catch(Exception e)

        {

            System.out.println(e.toString()); 

        }

    }

}