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


import javax.swing.JOptionPane;


public class TemperatureServer
{
    //String[] temperatureList =

                          //{"Take smaller bites",
                          // "Go for the tight jeans. No they do NOT make you look fat,",
                          // "One word: inappropriate",
                          // "Just for today be honest. Tell your boss what you *really* think",
                          // "You might want to rethink that haircut"
                          //};

{
     double celsiusValue = 0.0; //declares celsiusValue as a double variable
     double kelvinValue = 0.0; //declares kelvinValue as a double variable
     String userInput = JOptionPane.showInputDialog("Enter the Fahrenheit temperature:");
}


    public void go()
    {
        try
        {
            System.out.println("Started Temperature server....");
            System.out.println("Creating a server socket....");
            ServerSocket serverSocket = new ServerSocket(4242);
            System.out.println("Server READY to go....");

            while(true)
            {
                Socket sock = serverSocket.accept();
                PrintWriter writer = new PrintWriter(sock.getOutputStream());
                String temperature = userInput();
                writer.println(userInput);
                writer.close();
                System.out.println(userInput);
            }
        }
        catch(IOException ex)
        {
            ex.printStackTrace();
        }
    }
    private String userInput()
    {
        //int random = (int) (Math.random()* adviceList.length);
        //return adviceList[random];
    }
    public static void main(String args[])
    {
        TemperatureServer server = new TemperatureServer();
        server.go();
    }
}

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


import javax.swing.JOptionPane;


public class TemperatureServer
{
    //String[] temperatureList =

                          //{"Take smaller bites",
                          // "Go for the tight jeans. No they do NOT make you look fat,",
                          // "One word: inappropriate",
                          // "Just for today be honest. Tell your boss what you *really* think",
                          // "You might want to rethink that haircut"
                          //};

{
     double celsiusValue = 0.0; //declares celsiusValue as a double variable
     double kelvinValue = 0.0; //declares kelvinValue as a double variable
     String userInput = JOptionPane.showInputDialog("Enter the Fahrenheit temperature:");
}


    public void go()
    {
        try
        {
            System.out.println("Started Temperature server....");
            System.out.println("Creating a server socket....");
            ServerSocket serverSocket = new ServerSocket(4242);
            System.out.println("Server READY to go....");

            while(true)
            {
                Socket sock = serverSocket.accept();
                PrintWriter writer = new PrintWriter(sock.getOutputStream());
                String temperature = userInput();
                writer.println(userInput);
                writer.close();
                System.out.println(userInput);
            }
        }
        catch(IOException ex)
        {
            ex.printStackTrace();
        }
    }
    private String userInput()
    {
        //int random = (int) (Math.random()* adviceList.length);
        //return adviceList[random];
    }
    public static void main(String args[])
    {
        TemperatureServer server = new TemperatureServer();
        server.go();
    }
}

.....................................................................................

import java.io.*;
import java.net.*;
//class Socket is in java.net

public class TemperatureClient
{
    public void go()
    {
        try
        {
            Socket s = new Socket("127.0.0.1",4242);

            InputStreamReader streamReader = new InputStreamReader(s.getInputStream());
            BufferedReader reader = new BufferedReader(streamReader);

            String advice = reader.readLine();
            System.out.println("Receiving following message from Server...");
            System.out.println("The temperature is"+userInput);

            reader.close();
        }
        catch(IOException ex)
        {
            ex.printStackTrace();
        }
    }
    public static void main(String args[])
    {
        TemperatureClient client = new TemperatureClient();
        client.go();
    }
}