Implementing a Simple Client/Server Application

import java.net.*;
import java.io.*;
public class  server
{
 public static void main(String args[]) throws Exception
 {
  ServerSocket ss=new ServerSocket(2000);
  Socket s=ss.accept();
  BufferedReader br=new BufferedReader(newInputStreamReader(s.getInputStream()));
  double rad,area;
  String result;
  rad=Double.parseDouble(br.readLine());
  System.out.println("From Client : "+rad);
  area=Math.PI*rad*rad;
  result="Area is "+area; 
  PrintStream ps=new PrintStream(s.getOutputStream());
  ps.println(result);
  br.close();
  ps.close();
  s.close();
  ss.close();
 }
}
public class  client
{
 public static void main(String args[]) throws Exception
 {

  Socket s=new Socket("192.168.0.19",2000);
  BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
  String rad;
  System.out.println("Enter radius of the circle ");
  rad=br.readLine();
  PrintStream ps=new PrintStream(s.getOutputStream());
  ps.println(rad);
  BufferedReader fs=new BufferedReader(new InputStreamReader(s.getInputStream()));
  String result=fs.readLine();
  System.out.println("From Server : "+result);
  br.close();
  fs.close(); 
  ps.close();
  s.close();

 }
}