Socket Programming(From Client to Server)

Socket Programming:

 From Client to Server


Server End:


import java.net.*;
import java.util.*;
import java.io.*;

public class Server
{
 public static void main(String arr[]) throws Exception
 {
 ServerSocket ss=new ServerSocket(12345);
 Socket s=ss.accept();
 DataInputStream din=new DataInputStream(s.getInputStream());
 DataOutputStream dout=new DataOutputStream(s.getOutputStream());
 String str=din.readUTF();
 System.out.println("From Client: "+str);

 str=str.toUpperCase();
 dout.writeUTF(str);
 dout.flush();

 din.close();
 dout.close();
 s.close();
 ss.close();
 }
}


Client End:

import java.net.*;
import java.util.*;
import java.io.*;
import java.util.*;

public class Client
{
 public static void main(String arr[]) throws Exception
 {
 Socket s=new Socket("localhost",12345);
 Scanner sc=new Scanner(System.in);
 DataInputStream din=new DataInputStream(s.getInputStream());
 DataOutputStream dout=new DataOutputStream(s.getOutputStream());
 System.out.print("Enter text: ");
 String str=sc.nextLine();
 dout.writeUTF(str);
 dout.flush(); 

 str=din.readUTF();
 System.out.println("From Server: "+str);
 
 din.close();
 dout.close();
 s.close();
 }
}


Output:


Client end:

$ javac Client.java
$ java Client 
Enter text: Hello Server..! :)

From Server: HELLO SERVER..! :)


Server End:

$ java Server.java
$ java Server
From Client: Hello Server..! :)