ช่วยหน่อยติดปัญหาโปรแกรม ภาษาจาวา client/server
คือปัญหา ในการรันฝั่งไคลเอ้น ในรูป GUI ไม่ส่งข้อมูลไปยัง server
รบกวนผู้มีความรู้ ช่วยหน่อย นะคับ 
...ขอบคุณมากๆ...นะคับ สำหรับ...คำแนะ

//GuiTCPClientConvert.java
import java.io.*;
import java.net.*;
import java.util.Scanner;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class GuiTCPClientConvert extends JFrame implements ActionListener
{
      
       public static String message;
      public static String response;
      private static InetAddress host;
      private static int PORT = 1234;
        private static JTextArea display;
      private static JLabel f1;
      private static JLabel f2;
      private static JTextField inField;
       private static JTextField outField;
      private static JButton con;
      //private DatagramSocket socket;
      public GuiTCPClientConvert()
      {
       super("[Client] Conver Kilomate to Mile");

      Container c = getContentPane();
      c.setLayout( new FlowLayout());

      con = new JButton("Convert");
      f1 = new JLabel("Kilomate");
      inField  = new JTextField(20);
      f2 = new JLabel("Mile");
        outField = new JTextField(20);
        display = new JTextArea("test");
      
      c.add(f1);
      c.add(inField);
        c.add(con);
      c.add(f2);
      c.add(outField);
        //c.add(new JScrollPane( display),BorderLayout.SOUTH);
      con.addActionListener(this);

      setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      setSize(700,100);
      //pack();
      setLocationRelativeTo(null);
      setVisible(true);

       try
      {
         host = InetAddress.getLocalHost();
      }
      catch(UnknownHostException uhEx)
      {
      System.out.println("Host ID not found!");
      System.exit(1);
      }
      accessServer();
     } // end of GuiTCPClientConvert
      
      private static void accessServer()
      {
      Socket link = null; //Step 1.
      try
      {         
      link = new Socket(host,PORT); //Step 1.
      DataInputStream is = new DataInputStream( link.getInputStream() );
      PrintWriter output =new PrintWriter(link.getOutputStream(),true); //Step 2.
      DataInputStream input = new DataInputStream( System.in );
      //String message, response;
      do
      {
         
         System.out.print("\n### PROGRAM CONVERT KILOMATE TO MILE ###\n");
         System.out.print("Enter Number Kilomate : ");
         message = input.readLine();
         output.println(message); //Step 3.
         response = is.readLine(); //Step 3.
         System.out.println("\nSERVER> "+response);
         GuiTCPClientConvert.inField.setText(message);
         GuiTCPClientConvert.outField.setText(response);

      }while (!message.equals("***CLOSE***")); 
      }
      catch(IOException ioEx)
      {
      ioEx.printStackTrace();
      }
      finally
      {
      try
      {
      System.out.println("\n [client] Closing connection... ");
      link.close(); //Step 4.
      }
      catch(IOException ioEx)
      {
      System.out.println("Unable to disconnect!");
      System.exit(1);
      }
      }
      }
      
      public void actionPerformed(ActionEvent e)
        {     
         //System.out.println("Use actionperform!!!");
         message = inField.getText();
         //System.out.println(message);
         //System.out.println(response);
         outField.setText(response);

         
        } 
      
      
      public static void main( String args[] )
        {   
         new GuiTCPClientConvert();  }

}
---------------------------------------------------
//GuiTCPServerConvert.java
import java.io.*;
import java.net.*;
import java.util.Scanner;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class GuiTCPServerConvert extends JFrame
{
   private static ServerSocket servSock;
   private static int PORT = 1234;
   private static JTextField outField;
   private static JTextArea display;
   
   public GuiTCPServerConvert()
   {
      super("[Server] Convert Kilomate to Mile");
      Container c = getContentPane();
      display = new JTextArea();
      outField = new JTextField(20);
      c.add(new JScrollPane( display),BorderLayout.CENTER );
      //c.add(new JScrollPane( outField ),BorderLayout.SOUTH );
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(400, 300);
        show();
      //System.out.println("Opening port.....\n");
      display.append("Opening port.....\n");
        try
      {
      servSock = new ServerSocket(PORT); //Step 1.
      }
      catch(IOException ioEx)
      {
      //System.out.println("Unable to attach to port!");
      display.append("Unable to attach to port!");
      //System.exit(1);
      }
      do
      {
         handleClient();
      }
      while (true);
   } //end GuiTCPServerConvert
   
   private static void handleClient()
   {
      Socket link = null; //Step 2.
      try
      {
         link = servSock.accept(); //Step 2.
         DataInputStream is = new DataInputStream( link.getInputStream() ); //Step3.
         PrintWriter output = new PrintWriter(link.getOutputStream(),true); //Step3.
         
         int numMessages = 0;
         String message = is.readLine(); //Step 4.
         //String message = input.nextLine().toUpperCase(); //แปลงตัวเล็กเปงตัวใหญ่
         while (!message.equals("***CLOSE***"))
         {
            //System.out.println("Message received.");
            GuiTCPServerConvert.display.setText("Message received");
            numMessages++;
            String msg1 = message;
            double k2m = 0.621; 
            double msg2 = Integer.parseInt(msg1);
            double msg = msg2*k2m;
            output.println("Message[" + numMessages +"] = " + msg + "  Mile");
            message = is.readLine();
            
         } //end of while
            
         output.println(numMessages + " messages received.");//Step 4.
         
      } //end of try
      catch(IOException ioEx)
      {
         ioEx.printStackTrace();
      }
   finally
   {
      try
      {
         //System.out.println("\n[server]Closing connection... ");
         GuiTCPServerConvert.display.setText("\n [server]Closing connection... ");
         link.close(); //Step 5.
      }
      catch(IOException ioEx)
      {
         //System.out.println("Unable to disconnect!");
         GuiTCPServerConvert.display.setText("Unable to disconnect!");
         System.exit(1);
      }
   } //end finally
   } //end of handleClient()
      
   public static void main( String args[] )
       {   new GuiTCPServerConvert();  }
}