Заедает JButton

import java.io.*;
import java.net.*;
 import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
 
public class client extends JFrame {
String d = "";
private JLabel jLabel = null;
private JTextField jTextField = null;
private JButton jButton = null;
public client()
   {
      super();
      this.setSize(300, 300);
 this.getContentPane().setLayout(null);
this.getContentPane().add(getJLabel(), null);  
this.getContentPane().add(getJTextField(), null);  
this.getContentPane().add(getJButton(), null);  
this.setTitle("Регистрация");
   }
   private javax.swing.JLabel getJLabel() {
      if(jLabel == null) {
         jLabel = new javax.swing.JLabel();
         jLabel.setBounds(34, 49, 53, 18);
         jLabel.setText("Имя:");
      }
      return jLabel;
   }
   private javax.swing.JTextField getJTextField() {
      if(jTextField == null) {
         jTextField = new javax.swing.JTextField();
         jTextField.setBounds(96, 49, 160, 20);
      }
      return jTextField;
   }
   private javax.swing.JButton getJButton() {
      if(jButton == null) {
          jButton = new javax.swing.JButton();
         jButton.setBounds(103, 110, 71, 27);
         jButton.setText("OK");
jButton.addActionListener(new java.awt.event.ActionListener(){
   public void actionPerformed(java.awt.event.ActionEvent ae) {
d = jTextField.getText();
String fuser = d;
 
try {
Socket fromserver = null;
fromserver = new Socket("localhost",4444);
BufferedReader in  = new BufferedReader(new InputStreamReader(fromserver.getInputStream()));
   PrintWriter    out = new PrintWriter(fromserver.getOutputStream(),true);
BufferedReader inu = new BufferedReader(new InputStreamReader(System.in));
out.println(fuser);
String fserver;
   
    fserver = in.readLine();
System.out.println(fserver);
 
} catch(IOException e) {System.out.println("error");};
}
return();}  
);
}
      return jButton;
   }
public static void main(String[] args)
   {
client w = new client();
      w.setVisible(true);  
}
}

import java.io.*;
 
import java.net.*;
 
 
public class Server 
{
 
  public static void main(String[] args) throws IOException 
{
    System.out.println("Welcome to Server side");
 
    BufferedReader in = null;
 
    PrintWriter    out= null;
 
 
    ServerSocket servers = null;
 
   Socket       fromclient = null;
 
    // create server socket
 
    try {
      servers = new ServerSocket(4444);
    } 
catch (IOException e) 
{
      System.out.println("Couldn't listen to port 4444");
 
      System.exit(-1);
    }
 
 
    try {
      System.out.print("Waiting for a client...");
 
     fromclient= servers.accept();
 
      System.out.println("Client connected");
 
    } catch (IOException e)
 {
      System.out.println("Can't accept");
   
   System.exit(-1);
    }
 
 
   in  = new BufferedReader(new InputStreamReader(fromclient.getInputStream()));
 
    out = new PrintWriter(fromclient.getOutputStream(),true);
    
String         input,output;
 
 
    System.out.println("Wait for messages");
 
    while ((input = in.readLine()) != null)
 {
     if (input.equalsIgnoreCase("exit")) break;
   
  out.println("S ::: "+input);
  
   System.out.println(input);
    }
 
   out.close();
    in.close();
   
 fromclient.close();
    servers.close();
  }
}