creating a server and client in java

[charleyjoyce]

here's an example of a client /server

import java.io.*;
import java.net.*;
public class Client {
        private static Socket client;
    private static ObjectInputStream input;
    private static ObjectOutputStream output;
        public static void main(String[] args) throws IOException, EOFException{
                        System.out.println("connecting to server..");
                        client = new Socket(InetAddress.getByName("127.0.0.1"), 12345);
                        System.out.println("connected to : " + client.getInetAddress().getHostName() );
                        output = new ObjectOutputStream( client.getOutputStream() );
                        output.flush();
                        output.writeObject( args[0] );
                        output.flush();
                        output.close();
                        client.close();
        }
}

import java.net.*;
import java.io.*;
public class Server {
    private static ObjectInputStream input;
        private static ObjectOutputStream output;
        private static ServerSocket server;
        private static Socket connection;
        public static void main(String[] args) throws Exception{
                        server =  new ServerSocket(12345,100);
                        while (true){
                                        System.out.println("waiting for connection..");
                                        connection = server.accept();
                                        System.out.println("Connection received: " + connection.getInetAddress().getHostName());
                                        output = new ObjectOutputStream( connection.getOutputStream() );
                                        output.flush();
                                        input = new ObjectInputStream(connection.getInputStream() );
                                        System.out.println("Recv'd stream");
                                        String message = (String) input.readObject() ;
                                        System.out.println(message);
                                        output.close();
                                        input.close();
                                        connection.close();
                        }
        }
}

[JosAH]

here's an example of a client /server

Please don't give it all away and leave some work to be done for the OP; spoonfeeding is considered not done in this forum and the OP doesn't learn anything when you supply boilerplate code.

kind regards,

Jos

[krishforever]

thanks for everyone.

[user0]

Hi Krish - its advisable that you read some client server tutorials just as Fubarable mentioned in the earlier post. JosAH's code base is also a good starting point.

I learned socket programming using the Java tutorials, so here is a link to them for your reference: Reading from and Writing to a Socket (The Java™ Tutorials > Custom Networking > All About Sockets)

Have a thorough read through and see if it helps in your solution. If not, post back here, lets try to debug your code.

Best,

[danborgir]

Server:

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

public class SimpleServer {
public static void main(String args[]) {

ServerSocket s = null;
Socket s1;
String sendString ="Hello network world!!!!";
OutputStream os;
DataOutputStream dos;

try {
s = new ServerSocket(5432);
} catch (IOException e) { }
while (true) {
try {
// wait here and listen for a connection
s1 = s.accept();
//Get a communication stream associated with the socket
os = s1.getOutputStream();
dos = new DataOutputStream (os);
//Send your string! (UTF provides machine independence)
dos.writeUTF(sendString);
// close the connection, but not the server socket
dos.close();
os.close();
s1.close();
} catch (IOException e) {
// ignore 
  } } }
}

Client:

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

public class SimpleClient {
public static void main(String args[]) throws IOException {

Socket s1;
InputStream s1In;
DataInputStream dis;

s1 = new Socket("127.0.0.1", 5432);
s1In = s1.getInputStream();
dis = new DataInputStream(s1In);
String st = new String(dis.readUTF( ));
System.out.println(st);

dis.close(); s1In.close(); s1.close();
   }
 }

Hope that helps as a template.

[krishforever]

thanks for everyone. i could complete my assignment base on your support.thanks again.