Java SE (Java Platform, Standard Edition)

Hello to All ,

I attached the following code :

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Date;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextArea;
import javax.swing.JTextField;

public class ServerProg extends JFrame{
	
	Date date=new Date();
	ServerSocket serversocket;
	Socket socket;
	DataInputStream fromClient;
	DataOutputStream toClient;
	
	JTextArea jta=new JTextArea(20,20);
	JButton buttonSend=new JButton ("Send");
	JTextField jtf=new JTextField (20);
	JPanel panel=new JPanel();
	
	
	String dataFromClient=null;
	String dataToClient=null;
	//int num;
	public ServerProg ()
	{
		
		this.setLayout(new BorderLayout());
		
		panel.add(buttonSend);
		panel.add(jtf);
		this.add(BorderLayout.NORTH,panel);
		
		this.add(BorderLayout.SOUTH,jta);
		jta.append("Server started at :"+date.toString()+"\n");
		
		this.setVisible(true);
		this.pack();
		this.addWindowListener(new WindowAdapter ()
		{
			public void windowClosing (WindowEvent e)
			{
				System.exit(0);
			}
			
		}
		
		
		);
		
		
		
		try 
		{
			serversocket=new ServerSocket(8787);
			socket=serversocket.accept();
			
			//get data from client 
			
			fromClient=new DataInputStream (socket.getInputStream());
			dataFromClient=fromClient.readUTF();
			jta.append("Received from Client at "+" :"+dataFromClient+"\n");
			
			toClient=new DataOutputStream (socket.getOutputStream());
			
			buttonSend.addActionListener(new ActionListener ()
			{
				public void actionPerformed (ActionEvent e)
				{
					System.out.println ("Click on Button:");
					if (e.getActionCommand().equals("Send"))
					{
						dataToClient=jta.getText();
						try {
							toClient.writeUTF(dataToClient);
						} catch (IOException e1) {
							// TODO Auto-generated catch block
							e1.printStackTrace();
						}
						jta.append("Send to Client :"+dataToClient+"\n");
				
						
					}
				}
			}
			);	
			
		
			
		} 
		catch (IOException e) {
			
			System.out.println("IOException :"+e.getMessage());
		}
		
		
		
		
	}
	
	public static void main (String[] args)
	{
		ServerProg server=new ServerProg();
	}

}

the main problem is the buttonSend when i clicked on the button i don't see any event , i don't understand why , maybe it's something that related to the network code.

Waiting for yours answers urgently...