public class ServerChat extends Thread implements ActionListener {

private Frame mainFrame;
private Panel controlPanel;
private Button sendButton;
private JTextArea resultArea;
private JTextField writeMessage;
PersonList personList = new PersonList();
String name ;

private static int port = 9000;
private static ServerSocket server;
private static Socket conn;

public ServerChat() throws UnknownHostException, IOException {
    // The programme recognize the user who's logged in and get his name
    name=personList.getPersonFromIndex(personList.getPersonLogged()).getName() +" "+personList.getPersonFromIndex(personList.getPersonLogged()).getSurname() ;

    mainFrame = new Frame("Chat - SERVER area");
    mainFrame.setSize(500, 500);
    mainFrame.setLayout(new GridLayout(1, 2));
    mainFrame.addWindowListener(new WindowAdapter() {
        public void windowClosing(WindowEvent windowEvent) {
            System.exit(0);
        }
    });
    Border border = BorderFactory.createLineBorder(Color.BLACK);
    Dimension d = new Dimension();
    d.equals(mainFrame);
    resultArea = new JTextArea(20,40);

    JScrollPane scrollingArea = new JScrollPane(resultArea);
    JLabel lblMessage = new JLabel("MESSAGE: ");
    lblMessage.setForeground(Color.BLACK);
    writeMessage = new JTextField(40);
    writeMessage.setBackground(Color.white);
    writeMessage.setBorder(new LineBorder(Color.BLACK, 1));

    sendButton = new Button();
    sendButton.setLabel("SEND");
    sendButton.setFont(new Font("Tahoma", 1, 13));


    controlPanel = new Panel();
    controlPanel.setLayout(new FlowLayout());

    controlPanel.add(scrollingArea, border);
    controlPanel.add(lblMessage);
    controlPanel.add(writeMessage);
    controlPanel.add(sendButton);

    mainFrame.add(controlPanel);
    mainFrame.setResizable(false);
    mainFrame.setVisible(true);

    sendButton.setActionCommand("SEND");
    sendButton.addActionListener(this);

    server = new ServerSocket(port, 1, InetAddress.getLocalHost());

    conn = server.accept();

    while (true) {
        try {
            DataInputStream dis = new DataInputStream(conn.getInputStream());
            String string = dis.readUTF();

            if (string != " " && string != null && !string.isEmpty()) {
                resultArea.append(string + "n");
            }
        } catch (Exception e1) {
            try {
                Thread.sleep(3000);
                System.exit(0);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
}

public static void main(String[] args) throws IOException {
    // TODO code application logic here
    ServerChat swingControlDemo = new ServerChat();
}

public void actionPerformed(ActionEvent e) {
    String comand = sendButton.getActionCommand();

    if ((comand == "SEND") && (writeMessage.getText() != " ")) {
        try {
            DataOutputStream dos = new DataOutputStream(conn.getOutputStream());
            dos.writeUTF(name + " : "+writeMessage.getText());
              resultArea.append(name +" : "+ writeMessage.getText());
        } catch (Exception e1) {
            writeMessage.setText("There is an error in connection.");
            JOptionPane.showMessageDialog(null, "There is error in something...");

            try {
                Thread.sleep(3000);
                System.exit(0);
            } catch (InterruptedException e2) {
                e2.printStackTrace();
            }
        }
        writeMessage.setText("");
    }
}

public class ClientChat implements ActionListener {
private Frame mainFrame;
private Panel controlPanel;
private Button sendButton;
private JTextArea resultArea;
private JTextField writeMessage;

private static int port = 9000;
private String sName = "localhost";
private Socket conn;
PersonList personList = new PersonList();
String name ;


public ClientChat() throws IOException {
    name= personList.getPersonFromIndex(personList.getPersonLogged()).getName() +" "+personList.getPersonFromIndex(personList.getPersonLogged()).getSurname() ;
    mainFrame = new Frame("Chat - CLIENT area");
    mainFrame.setSize(500, 500);
    mainFrame.setLayout(new GridLayout(1, 2));
    mainFrame.addWindowListener(new WindowAdapter() {
        public void windowClosing(WindowEvent windowEvent) {
            System.exit(0);
        }
    });

    Border border = BorderFactory.createLineBorder(Color.BLACK);
    resultArea = new JTextArea(20,40);

    JScrollPane scrollingArea = new JScrollPane(resultArea);

    JLabel lblMessage = new JLabel("MESSAGE: ");
    lblMessage.setForeground(Color.BLACK);

    writeMessage = new JTextField(37);
    writeMessage.setBackground(Color.LIGHT_GRAY);
    writeMessage.setBorder(new LineBorder(Color.BLACK, 1));

    sendButton = new Button();
    sendButton.setLabel("SEND");
    sendButton.setFont(new Font("Tahoma", 1, 13));

    controlPanel = new Panel();
    controlPanel.setLayout(new FlowLayout());

    controlPanel.add(scrollingArea, border);
    controlPanel.add(lblMessage);
    controlPanel.add(writeMessage);
    controlPanel.add(sendButton);

    mainFrame.add(controlPanel);
    mainFrame.setResizable(false);
    mainFrame.setBounds(620, 1, 600, 600);
    mainFrame.setVisible(true);

    sendButton.setActionCommand("SEND");
    sendButton.addActionListener(this);

    try {
        conn = new Socket(InetAddress.getLocalHost(), port);
    } catch (Exception e) {
        resultArea.setText("The server is not up.");
        //JOptionPane.showMessageDialog(null, "There is error in something...");
    }

    while (true) {
        try {
            DataInputStream dis = new DataInputStream(conn.getInputStream());
            String string = dis.readUTF(); //it will read the data from dis



            if (string != " " && string != null && !string.isEmpty()) {
                resultArea.append(string + "n");
            }

        } catch (Exception e1) {
        }
    }
}

public static void main(String[] args) throws IOException {
    // TODO code application logic here
    char a;
    Scanner in = new Scanner(System.in);
    //a = in.n

    ClientChat swingControlDemo = new ClientChat();
}

public void actionPerformed(ActionEvent e) {

    String comand = sendButton.getActionCommand();

    if ((comand == "SEND") && (writeMessage.getText() != "")) {
        try {
            DataOutputStream dos = new DataOutputStream(conn.getOutputStream());
            dos.writeUTF(name + " : "+writeMessage.getText());
            resultArea.append(name +" : "+ writeMessage.getText());
        } catch (Exception e1) {

            try {
                Thread.sleep(3000);
                System.exit(0);
            } catch (InterruptedException e2) {
                e2.printStackTrace();
            }
        }
        writeMessage.setText("");
    }
}

private void chatRoomButtonActionPerformed(java.awt.event.ActionEvent evt) {
    try {
        Thread r = new Thread(new ServerChat());
        r.start();

    } catch (IOException ex) {
        Logger.getLogger(StaffMainPage.class.getName()).log(Level.SEVERE, null, ex);
    }


}