How to connect 2 different computers on a network using a chat application in Java?

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I have a simple pair of client and server programs. Client connects to server and when it does connect, the server replies with a "Hello there" message. How should I modify the program if I want the client and server programs to run on different systems?

Here is the code for the client side..

package practice;

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

public class DailyAdviceClient
{
    public static void main(String args[])
    {
        DailyAdviceClient dac = new DailyAdviceClient();
        dac.go();
    }

    public void go()
    {
        try
        {
            Socket incoming = new Socket("127.0.0.1",4242);
            InputStreamReader stream = new InputStreamReader(incoming.getInputStream());
            BufferedReader reader = new BufferedReader(stream);
            String advice = reader.readLine();
            reader.close();
            System.out.println("Today's advice is "+advice);
        }
        catch(Exception e)
        {
            System.out.println("Client Side Error");
        }
    }
}

and here is the code for the server

package practice;

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

public class DailyAdviceServer
{
    public static void main(String args[])
    {
        DailyAdviceServer das = new DailyAdviceServer();
        das.go();
    }

    public void go()
    {
        try
        {
            ServerSocket serversock = new ServerSocket(4242);

            while(true)
            {
                Socket outgoing = serversock.accept();
                PrintWriter writer = new PrintWriter(outgoing.getOutputStream());
                writer.println("Hello there");
                writer.close();

            }
        }
        catch(Exception e)
        {
            System.out.println("Server Side Problem");
        }
    }
}

asked 55 secs ago

user3760100

18