Write a Socket program in java for chatting application. (Use AWT)

ClientChatForm.java

        import java.awt.event.ActionEvent;
        import java.awt.event.ActionListener;
        import java.awt.print.PrinterException;
        import java.io.DataInputStream;
        import java.io.DataOutputStream;
        import java.io.IOException;
        import java.net.InetAddress;
        import java.net.Socket;
        import java.net.UnknownHostException;
        import java.sql.Time;
        import javax.swing.JButton;
        import javax.swing.JFrame;
        import javax.swing.JPanel;
        import javax.swing.JTextArea;
        import javax.swing.JTextField;

public class ClientChatForm extends JFrame implements ActionListener {
    static Socket conn;
    JPanel panel;
    JTextField NewMsg;
    JTextArea ChatHistory;
    JButton Send;

    public ClientChatForm() throws UnknownHostException, IOException 

{
        panel = new JPanel();
        NewMsg = new JTextField();
        ChatHistory = new JTextArea();
        Send = new JButton("Send");
        this.setSize(500, 500);
        this.setVisible(true);
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        panel.setLayout(null);
        this.add(panel);
        ChatHistory.setBounds(20, 20, 450, 360);
        panel.add(ChatHistory);
        NewMsg.setBounds(20, 400, 340, 30);
        panel.add(NewMsg);
        Send.setBounds(375, 400, 95, 30);
        panel.add(Send);
        56        Send.addActionListener(this);
        conn = new Socket(InetAddress.getLocalHost(), 2000);
/** for remote pc use ip address of server with function* InetAddress.getByName("Provide ip here")* ChatHistory.setText("Connected to Server");*/        ChatHistory.setText("Connected to Server");
        this.setTitle("Client");
        while (true) {
            try {
                DataInputStream dis = new DataInputStream(conn.getInputStream());
                String string = dis.readUTF();
                ChatHistory.setText(ChatHistory.getText() + '\n' + "Server:"                        + string);
            } catch (Exception e1) {
                ChatHistory.setText(ChatHistory.getText() + '\n'                        + "Message sending fail:Network Error");
                try {
                    Thread.sleep(3000);
                    System.exit(0);
                } catch (InterruptedException e) {
// TODO Auto-generated catch block                    e.printStackTrace();
                }
            }
        }
    }
    @Override    public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub        if ((e.getSource() == Send) && (NewMsg.getText() != "")) {
            ChatHistory.setText(ChatHistory.getText() + '\n' + "Me:"                    + NewMsg.getText());
            try {
                DataOutputStream dos = new DataOutputStream(
                        conn.getOutputStream());
                dos.writeUTF(NewMsg.getText());
            } catch (Exception e1) {
                ChatHistory.setText(ChatHistory.getText() + '\n'                        + "Message sending fail:Network Error");
                     try {
                    Thread.sleep(3000);
                    System.exit(0);
                } catch (InterruptedException e2) {
// TODO Auto-generated catch block                    e2.printStackTrace();
                }
            }
            NewMsg.setText("");
        }
    }
    public static void main(String[] args) throws UnknownHostException,
            IOException {
        ClientChatForm chatForm = new ClientChatForm();
    }
}

serverChatForm.java

        import java.awt.event.ActionEvent;
        import java.awt.event.ActionListener;
        import java.io.DataInputStream;
        import java.io.DataOutputStream;
        import java.io.IOException;
        import java.net.InetAddress;
        import java.net.ServerSocket;
        import java.net.Socket;
        import java.net.UnknownHostException;
        import javax.swing.JButton;
        import javax.swing.JFrame;
        import javax.swing.JPanel;
        import javax.swing.JTextArea;
        import javax.swing.JTextField;
public class serverChatform extends JFrame implements ActionListener {
    static ServerSocket server;
    static Socket conn;
    JPanel panel;
    JTextField NewMsg;
    JTextArea ChatHistory;
    JButton Send;
    DataInputStream dis;
    DataOutputStream dos;
    public serverChatform() throws UnknownHostException, IOException {
        panel = new JPanel();
        NewMsg = new JTextField();
        ChatHistory = new JTextArea();
        Send = new JButton("Send");
        this.setSize(500, 500);
        this.setVisible(true);
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        panel.setLayout(null);
        this.add(panel);
        ChatHistory.setBounds(20, 20, 450, 360);
        panel.add(ChatHistory);
        NewMsg.setBounds(20, 400, 340, 30);
        panel.add(NewMsg);
        Send.setBounds(375, 400, 95, 30);
        panel.add(Send);
        this.setTitle("Server");
        Send.addActionListener(this);
        server = new ServerSocket(2000, 1, InetAddress.getLocalHost());
        ChatHistory.setText("Waiting for Client");
        conn = server.accept();
        ChatHistory.setText(ChatHistory.getText() + '\n' + "Client Found");
        while (true) {
            try {
                DataInputStream dis = new DataInputStream(conn.getInputStream());
                String string = dis.readUTF();
                ChatHistory.setText(ChatHistory.getText() + '\n' + "Client:"                        + string);
            } catch (Exception e1) {
                ChatHistory.setText(ChatHistory.getText() + '\n'                        + "Message sending fail:Network Error");
                try {
                    Thread.sleep(3000);
                    System.exit(0);
                } catch (InterruptedException e) {
// TODO Auto-generated catch block                    e.printStackTrace();
                }
            }
        }
    }
    @Override    public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub        if ((e.getSource() == Send) && (NewMsg.getText() != "")) {
            ChatHistory.setText(ChatHistory.getText() + '\n' + "ME:"                    + NewMsg.getText());
            try {
                DataOutputStream dos = new DataOutputStream(
                        conn.getOutputStream());
                dos.writeUTF(NewMsg.getText());
            } catch (Exception e1) {
                try {
                    Thread.sleep(3000);
                    System.exit(0);
                } catch (InterruptedException e2) {
// TODO Auto-generated catch block                    e2.printStackTrace();
                }
            }
            NewMsg.setText("");
        }
    }
    public static void main(String[] args) throws UnknownHostException,
            IOException {
        new serverChatform();
    }
}