Socket Programming in Java

Here is a simple implementation of Client-Server in java programming (Code Snippet):

For client:

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

public class SimpleClient {

    public static void main(String[] args) throws IOException {
       
        //Open your connection to a server, at port 1234
        Socket s1 = new Socket("", 1234);
        //Get an input file handle from the socket and read the input
        InputStream s1in = s1.getInputStream();
        DataInputStream dis = new DataInputStream(s1in);
        String st = new String(dis.readUTF());
        System.out.println(st);
        //When done just close the connection and exit
        dis.close();
        s1in.close();
        s1.close();
       
       
    }
}


For Server:

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


public class SimpleServer {

   
    public static void main(String[] args) throws IOException{
        
         //Register service on port 1234
        ServerSocket s = new ServerSocket(1234);
        Socket s1 = s.accept();//wait and accept a connection
        //Get a connection stream associated with the socket
        OutputStream s1out = s1.getOutputStream();
        DataOutputStream dos = new DataOutputStream(s1out);
        //Send a string
        dos.writeUTF("Hi there");
        //close the connection but not the server socket
        dos.close();
        s1out.close();
        s1.close();
    }

}