// Client.java: The client sends the input to the server and receives
// result back from the server
package Chapter16;

import java.io.*;
import java.net.*;
import java.util.*;
import Chapter2.MyInput;

public class Client
{
  // Main method
  public static void main(String[] args)
  {
    try
    {
      // Create a socket to connect to the server
      Socket connectToServer = new Socket("localhost",8000);

      // Create a buffered input stream to receive data
      // from the server
      BufferedReader isFromServer = new BufferedReader(
        new InputStreamReader(connectToServer.getInputStream()));

      // Create a buffered output stream to send data to the server
      PrintWriter osToServer =
        new PrintWriter(connectToServer.getOutputStream(), true);

      // Continuously send radius and receive area
      // from the server
      while (true)
      {
        // Read the radius from the keyboard
        System.out.print("Please enter a radius: ");
        double radius = MyInput.readDouble();

        // Send the radius to the server
        osToServer.println(radius);

        // Get area from the server
        StringTokenizer st = new StringTokenizer(
          isFromServer.readLine());

        // Convert string to double
        double area = new Double(
          st.nextToken ()).doubleValue();

        // Print area on the console
        System.out.println("Area received from the server is "
          +area);
      }
    }
    catch (IOException ex)
    {
      System.err.println(ex);
    }
  }
}