Problems with juava juices

[Mystic]

Trying to send a message gets a lot of mistakes. Here's Client:

import java.awt.Color;
import java.awt.BorderLayout;
import java.awt.event.*;
import javax.swing.*;
import java.io.;

import java.net.;
class SocketClient extends JFrame implements ActionListener

{
JLabel text, clicked;
JButton button;
JPanel panel;
JTextField textField;
Socket socket = null;
PrintWriter out = null;
BufferedReader in = null;

SocketClient()
{   //Начало конструктора
    text = new JLabel("Текст для отправки через сокет:");
    textField = new JTextField(20);
    button = new JButton("Отправить");
    button.addActionListener(this);

    panel = new JPanel();
    panel.setLayout(new BorderLayout());
    panel.setBackground(Color.white);
    getContentPane().add(panel);
    panel.add("North", text);
    panel.add("Center", textField);
    panel.add("South", button);
} //Конец конструктора

public void actionPerformed(ActionEvent event)
{
    Object source = event.getSource();

    if(source == button)
    {
        //Передача данных через сокет
        String text = textField.getText();
        System.out.println(text);
        textField.setText(new String(""));

        //Получить текст с сервера
        try
        {
            String line = in.readLine();
            System.out.println("Text received :" + line);
        }

        catch (IOException e)
        {
            System.out.println("Read failed");
            System.exit(1);
        }
    }
}

public void listenSocket()
{
    //Создать сокет
    try
    {
        socket = new Socket("localhost", 4444);
        out = new PrintWriter(socket.getOutputStream(), true);
        in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
    }

    catch (UnknownHostException e)
    {
        System.out.println("Unknown host: localhost");
        System.exit(1);
    }

    catch  (IOException e)
    {
        System.out.println("Nowdced I/O");
        System.exit(1);
    }
}

public static void main(String[] args)
{
    SocketClient frame = new SocketClient();
    frame.setTitle("Client");
    WindowListener l = new WindowAdapter()
    {
        public void windowClosing(WindowEvent e)
        {
            System.exit(0);
        }
    };

    frame.addWindowListener(l);
    frame.pack();
    frame.setVisible(true);
    frame.listenSocket();
}

}

Added.

Mistakes:

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException at SocketClient.actionPerformed(SocketClient.java:50) at javax.swing.AbstractButton.fireActionPerformed(Unknown Source) at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source) at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source) at javax.swing.DefaultButtonModel.setPressed(Unknown Source) at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source) at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source) at java.awt.Component.processEvent(Unknown Source) at java.awt.Container.processEvent(Unknown Source) at java.awt.Component.dispatchEventImpl(Unknown Source) at java.awt.Container.dispatchEventImpl(Unknown Source) at java.awt.Component.dispatchEvent(Unknown Source) at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source) at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source) at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source) at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source) at java.awt.Window.dispatchEventImpl(Unknown Source) at java.awt.Component.dispatchEvent(Unknown Source) at java.awt.EventQueue.dispatchEventImpl(Unknown Source) at java.awt.EventQueue.access$000(Unknown Source) at java.awt.EventQueue$3.run(Unknown Source) at java.awt.EventQueue$3.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source) at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source) at java.awt.EventQueue$4.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source) at java.awt.EventQueue.dispatchEvent(Unknown Source) at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.run(Unknown Source)

[Kadir]

On my running view of this.

button.addActionListener(this);

The object tries to use itself (not yet created). I'm not even saying that I don't understand what the object of this class is, Freim, the Processor of Events or the Protocol of Sokette.

And there's a code here that's collected. at least 3 classes: GUI, Main and Protocol.