public server_frame()
    {
        initComponents();
    }

    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {

        jScrollPane1 = new javax.swing.JScrollPane();
        ta_chat = new javax.swing.JTextArea();
        b_start = new javax.swing.JButton();
        b_end = new javax.swing.JButton();
        b_users = new javax.swing.JButton();
        b_clear = new javax.swing.JButton();
        lb_name = new javax.swing.JLabel();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setTitle("Chat - Server's frame");
        setName("server"); // NOI18N
        setResizable(false);

        ta_chat.setColumns(20);
        ta_chat.setRows(5);
        jScrollPane1.setViewportView(ta_chat);

        b_start.setText("START");
        b_start.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                b_startActionPerformed(evt);
            }
        });

        b_end.setText("END");
        b_end.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                b_endActionPerformed(evt);
            }
        });

        b_users.setText("Online Users");
        b_users.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                b_usersActionPerformed(evt);
            }
        });

        b_clear.setText("Clear");
        b_clear.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                b_clearActionPerformed(evt);
            }
        });

        lb_name.setText("TechWorld3g");
        lb_name.setBorder(javax.swing.BorderFactory.createLineBorder(new java.awt.Color(0, 0, 0)));

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(jScrollPane1)
                    .addGroup(layout.createSequentialGroup()
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                            .addComponent(b_end, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                            .addComponent(b_start, javax.swing.GroupLayout.DEFAULT_SIZE, 75, Short.MAX_VALUE))
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 291, Short.MAX_VALUE)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                            .addComponent(b_clear, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                            .addComponent(b_users, javax.swing.GroupLayout.DEFAULT_SIZE, 103, Short.MAX_VALUE))))
                .addContainerGap())
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addComponent(lb_name)
                .addGap(209, 209, 209))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 340, Short.MAX_VALUE)
                .addGap(18, 18, 18)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(b_start)
                    .addComponent(b_users))
                .addGap(18, 18, 18)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(b_clear)
                    .addComponent(b_end))
                .addGap(4, 4, 4)
                .addComponent(lb_name))
        );

        pack();
    }// </editor-fold>

    private void b_endActionPerformed(java.awt.event.ActionEvent evt) {
        try
        {
            Thread.sleep(5000);                 //5000 milliseconds is five second.
        }
        catch(InterruptedException ex) {Thread.currentThread().interrupt();}

        tellEveryone("Server:is stopping and all users will be disconnected.\n:Chat");
        ta_chat.append("Server stopping... \n");

        ta_chat.setText("");
    }

    private void b_startActionPerformed(java.awt.event.ActionEvent evt) {
        Thread starter = new Thread(new ServerStart());
        starter.start();

        ta_chat.append("Server started...\n");
    }

    private void b_usersActionPerformed(java.awt.event.ActionEvent evt) {
        ta_chat.append("\n Online users : \n");
        for (String current_user : users)
        {
            ta_chat.append(current_user);
            ta_chat.append("\n");
        }

    }

    private void b_clearActionPerformed(java.awt.event.ActionEvent evt) {
        ta_chat.setText("");
    }

    public static void main(String args[])
    {
        java.awt.EventQueue.invokeLater(new Runnable()
        {
            @Override
            public void run() {
                new server_frame().setVisible(true);
            }
        });
    }

    public class ServerStart implements Runnable
    {
        @Override
        public void run()
        {
            clientOutputStreams = new ArrayList();
            users = new ArrayList();

            try
            {
                ServerSocket serverSock = new ServerSocket(2222);

                while (true)
                {
				Socket clientSock = serverSock.accept();
				PrintWriter writer = new PrintWriter(clientSock.getOutputStream());
				clientOutputStreams.add(writer);

				Thread listener = new Thread(new ClientHandler(clientSock, writer));
				listener.start();
				ta_chat.append("Got a connection. \n");
                }
            }
            catch (Exception ex)
            {
                ta_chat.append("Error making a connection. \n");
            }
        }
    }