client.java

java socket for client

/*
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 * and open the template in the editor.
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import java.io.*;
import java.net.*;

/**
 *
 * @author admin
 */
public class client {
   // private  String strHost;
   private static ServerSocket  servSock;
   private static InetAddress host ;
   private static final int PORT = 5000;
   private static Socket link ;
   private static BufferedReader in ;
   private static PrintWriter out ;
   private static BufferedReader keyboard ;

   public static void main(String args[]){
      try{
         //host = InetAddress.getLocalHost();
         //strHost = args[0] ;
         System.out.println("Opening Port.....\n");
         try{
            servSock = new ServerSocket(PORT);
         }catch(IOException e){
            System.out.println("Unable to attach to port");
            System.exit(1);
         }
         host = InetAddress.getByName("169.254.235.236");
         link = new Socket(host,PORT);
    
         in = new BufferedReader(new InputStreamReader(link.getInputStream()));
         out = new PrintWriter(link.getOutputStream(),true);

         keyboard = new BufferedReader(new InputStreamReader(System.in));

         String message, response;
         do{
             System.out.print("Enter message(QUIT to exit)");
             message = keyboard.readLine();
             
             Socket client = servSock.accept();
             ClientHandler handler = new ClientHandler(client);
             handler.start();
             
             out.println(message);
             response = in.readLine();
             System.out.println(response);
         }while(!message.equals("QUIT"));

      }catch(UnknownHostException e){
          System.out.println("Host ID not found!");
      }
      catch(IOException e){
         e.printStackTrace();
      }
      finally{
         try{
            if (link != null){
                System.out.println("Closing down connection");
                link.close();
            }
         }
         catch(IOException e){
             e.printStackTrace();
         }
      }

   }
   
   static class ClientHandler extends Thread{
   private Socket client ;
   private BufferedReader in ;
   private PrintWriter out ;

   public ClientHandler(Socket socket){
      client = socket ;

      try{
         in = new BufferedReader(new InputStreamReader(client.getInputStream()));
         out = new PrintWriter(client.getOutputStream(),true);
      }catch(IOException e){
         e.printStackTrace();
      }
   }
   public void run(){
      try{
         String received ;
         do{
            received = in.readLine();
            System.out.println(received);
            out.println("ECHO : " + received);
         }while(!received.equals("QUIT"));
            
      }catch(IOException e){
         e.printStackTrace();
      }
      finally{
         try{
            if (client != null){
               System.out.println("Closing down connection");
               client.close();
            }
         }catch(IOException e){
            e.printStackTrace();
         }
      }
   }
   }

}