import java.io.*; 
import java.net.*; 
import java.awt.*; 
import java.awt.event.*; // Must add this  
import java.applet.*; 
 // ----------------------------------------------  
 // This thread reads in input stream from a socket and  
 // appends the output to a TextArea object 
class DisplayThread extends Thread {     
   TextArea m_text;  
   BufferedReader inChat = null; 
 
    DisplayThread (TextArea text, BufferedReader in)  
    {  
       m_text =text; 
       inChat = in;  
    } 
 
    public void run() { 
       System.out.println("Start DisplayThread "); 
       String str; 
        
       try { 
               while ((str = inChat.readLine()) != null)  
               { 
                       if (str.length() > 0) 
                       { 
                           m_text.append(str); 
                           m_text.append("\n"); 
                       } 
               }    
       } 
       catch (IOException e) 
       { 
           System.out.println("inChat received an IOException: "+ 
                   e.getMessage()); 
           e.printStackTrace(); 
       }           
 
       System.out.println("Display Thread Finishing"); 
    }  
}  
// -----------------------------------------  
 
 
public class ChatClientApplet extends Applet 
       implements ActionListener{ 
 TextArea tArea=new TextArea("",15,80,TextArea.SCROLLBARS_BOTH); 
 TextField tinput=new TextField("",80); 
 Socket chatSocket = null; 
 PrintWriter outChat = null; 
 BufferedReader inChat = null; 
 DisplayThread myReader; 
 
public  void init() { 
       add(tArea); 
       add (new Label( 
           "Enter in your input into the following text field and hit the enter key")); 
       add(tinput); 
       tinput.addActionListener(this); 
} 
 
public void actionPerformed(ActionEvent e) 
{ 
       String str = tinput.getText();  
       System.out.println("My Input = " + str); 
       if (myReader.isAlive()) 
                  outChat.println(str);   
       tinput.setText("");
} 
 
 
 public void stop() { 
       System.out.println("Terminating"); 
       try { 
               outChat.close(); 
               inChat.close(); 
               chatSocket.close(); 
       } 
       catch (IOException e) 
       { 
           System.out.println("IOException in stop: " + 
               e.getMessage()); 
       } 
   } 
 
 
 public  void start() { 
        ChatClientApplet myApplet=new ChatClientApplet();    
        int port =4444; 
        String hostStr, portStr; 
 
       hostStr = getParameter("host"); 
       portStr = getParameter("port"); 
       System.out.println("Connect to host = "+ hostStr+ 
               " port = " + portStr); 
// This will throw an exception if it doesn't exist or has junk in it.  
       port = Integer.parseInt(portStr); 
        
 
        try  
            { 
               chatSocket = new Socket(hostStr, port); 
                
       // Create a PrintWriter object for socket output 
 
               outChat = new PrintWriter( 
                       chatSocket.getOutputStream(), true); 
 
       // Create a BufferedReader object for socket input 
 
               inChat = new BufferedReader( 
                       new InputStreamReader( 
                       chatSocket.getInputStream())); 
           }  
            catch (UnknownHostException e) { 
               System.err.println("UnknownHostException: " + 
                       e.getMessage()); 
           } catch (IOException e) { 
               System.err.println("IOException: " + 
                    e.getMessage()); 
           } 
 
        myReader = new DisplayThread(tArea, inChat); 
        myReader.start(); 
 
 
    } 
 
 
 
}