This is my ChaClient file

Question

2. ChatClient.java
import java.net.*;
import java.io.*;
import java.applet.*;
import java.awt.*;
public class ChatClient extends Applet
{  private Socket socket              = null;
private DataInputStream console = null;
private DataOutputStream streamOut = null;
private ChatClientThread client = null;
private TextArea display = new TextArea();
private TextField input = new TextField();
private Button send = new Button("Send"), connect = new Button("Connect"),
quit = new Button("Bye");
private String serverName = "localhost";
private int serverPort = 4444;
public void init()
Panel keys = new Panel();
keys.setLayout(new GridLayout(1,2));
keys.add(quit);
keys.add(connect);
Panel south = new Panel();
south.setLayout(new BorderLayout());
south.add("West", keys);
south.add("Center", input);
south.add("East", send);
Label title = new Label("Simple Chat Client Applet", Label.CENTER);
title.setFont(new Font("Helvetica", Font.BOLD, 14));
setLayout(new BorderLayout());
add("North", title);
add("Center", display);
add("South", south);
quit.disable();
send.disable();
getParameters();
public boolean action(Event e, Object o)
if (e.target == quit)
input.setText(".bye");
send();
quit.disable();
send.disable();
connect.enable();
else if (e.target == connect)
connect(serverName, serverPort);
else if (e.target == send)
send();
input.requestFocus();
return true;
//////////by ankita
//catch(NullPointerException npe)
public void connect(String serverName, int serverPort)
println("Establishing connection. Please wait ...");
try
socket = new Socket(serverName, serverPort);
println("Connected: " + socket);
open();
send.enable();
connect.disable();
quit.enable();
catch(UnknownHostException uhe)
println("Host unknown: " + uhe.getMessage());
catch(IOException ioe)
println("Unexpected exception: " + ioe.getMessage());
///////////////by ankita
catch(NullPointerException npe)
private void send()
try
streamOut.writeUTF(input.getText());
streamOut.flush();
input.setText("");
catch(IOException ioe)
println("Sending error: " + ioe.getMessage());
close();
public void handle(String msg)
if (msg.equals(".bye"))
println("Good bye. Press RETURN to exit ...");
close(); }
else println(msg);
public void open()
try
streamOut = new DataOutputStream(socket.getOutputStream());
client = new ChatClientThread(this, socket);
catch(IOException ioe)
println("Error opening output stream: " + ioe);
public void close()
try
if (streamOut != null) streamOut.close();
if (socket != null) socket.close();
catch(IOException ioe)
println("Error closing ...");
client.close();
client.stop();
private void println(String msg)
display.appendText(msg + "\n");
public void getParameters()
try
serverName = getParameter("host");
serverPort = Integer.parseInt(getParameter("port"));
catch(NumberFormatException nfe)
// println("error Null"+ nfe);
//catch ( NullPointerException npe)
public static void main(String args[])
<applet code="ChatClient.class" height=200 Width=200>
</applet>
*/

Answer 1

If you expect anyone to actually read through this when you can't even bother telling us what your problem is, you're stoned.
Try asking a question instead of assuming we're psychic.