Simple Chat Application Using Applet

1. Client.java

package chatterapi;

/*

 @navindra k. jha

 */

import java.applet.Applet;

import java.awt.*;

import java.awt.event.*;

import java.net.*;

import java.io.*;

public class Client extends Applet implements ActionListener, Runnable

{

        Image Icon = Toolkit.getDefaultToolkit().getImage("D:/Example/emperian/jsf/ChatterAPI/src/chatterapi/hi.gif") ;

                Socket s;

                BufferedReader br;

                BufferedWriter bw;

                TextField text;

        Button sendBut, exitBut;

                List list;

    @Override

public void init(){

setForeground(Color.blue);

getAppletContext().showStatus("...");

}

    @Override

        public void start()

                {

              

                setSize(300, 130);

                                //setIconImage(Icon);

                                setLocation(300,0);

               // setResizable(false);

                setBackground(new Color(192, 192, 192));

                                this.setLayout(new GridLayout(2, 1));

                Panel panels[] = new Panel[2];

                panels[0] = new Panel();

                panels[1] = new Panel();

                panels[0].setLayout(new BorderLayout());

                panels[1].setLayout(new FlowLayout(FlowLayout.LEFT));

                sendBut = new Button("Send");

                exitBut = new Button("Exit");

                sendBut.addActionListener(this);

                exitBut.addActionListener(this);

                list = new List();

                                text = new TextField(25);

                panels[0].add(list);

                panels[1].add(text);

                panels[1].add(sendBut);

                panels[1].add(exitBut);    

                add(panels[0]);

                add(panels[1]);

               

                                setVisible(true);

               

                try

                {

                        /* Assuming that this application is run on single

                        machine I've used the default ip i.e., 127.0.0.1. If

                        you want to use it on 2 different machines use the

                        ip that is assigned to the machine on which server

                        applicatin is residing*/

                        s = new Socket("127.0.0.1", 1051);

                        br = new BufferedReader(new InputStreamReader(s.getInputStream()));

                        bw = new BufferedWriter(new OutputStreamWriter(s.getOutputStream()));

                                                Thread th;

                                                th = new Thread(this);

                                                th.start();

                                               

                                }catch(Exception e){System.out.println("Error:"+e);}

                               

                }

     

        public void run()

                {

                while (true)

                                {

                                                try

                        {

                                list.add("R: "+br.readLine());

                                list.select(list.getItemCount()-1);

                                showStatus("connected..");

                                                }catch (Exception h){System.out.println("Error:"+h);}

                                }

                }

               

        public void actionPerformed(ActionEvent ae)

                {

                 if(ae.getSource().equals(exitBut))

                                                 System.exit(0);

                                 else

                 {

                        try

                        {

                                bw.write(text.getText());

                                showStatus("connected..");

                                list.add("S: "+text.getText());

                                showStatus("Data sent...");

                                list.select(list.getItemCount()-1);

                                bw.newLine();

                                bw.flush();

                                text.setText("");

                        }catch(Exception m){System.out.println("Error:"+m);}

                                 }

                                                                 

                }

               

}

2. Server.java

package chatterapi;

/*

 @navindra k. jha

 */

import java.applet.Applet;

import java.awt.*;

import java.awt.event.*;

import java.net.*;

import java.io.*;

public class Server extends Applet implements ActionListener, Runnable

{

        Image Icon = Toolkit.getDefaultToolkit().getImage("D:/Example/emperian/jsf/ChatterAPI/src/chatterapi/hi.gif");

        ServerSocket ss;

        Socket s;

                BufferedReader br;

                BufferedWriter bw;

                TextField text;

        Button sendBut, exitBut;

        List list;

    @Override

public void init(){

    setForeground(Color.blue);

   getAppletContext().showStatus("...");

   

}

    @Override

        public void start() // class constructor

                {

               

               // super(m);

                setSize(300, 130);

                setLocation(0,0);

               // setIconImage(Icon);

               // setResizable(false);

                setBackground(new Color(192, 192, 192));

                this.setLayout(new GridLayout(2, 1));

                Panel panels[] = new Panel[2];

                panels[0] = new Panel();

                panels[1] = new Panel();

                panels[0].setLayout(new BorderLayout());

                panels[1].setLayout(new FlowLayout(FlowLayout.LEFT));

                sendBut = new Button("Send");

                exitBut = new Button("Exit");

                sendBut.addActionListener(this);

                exitBut.addActionListener(this);

                list = new List();

                list.select(list.getItemCount()-1);

               

                text = new TextField(25);

                panels[0].add(list);

                panels[1].add(text);

                panels[1].add(sendBut);

                panels[1].add(exitBut);    

                add(panels[0]);

                add(panels[1]);

                showStatus("......");

                setVisible(true);

                try

                {       showStatus("connecting ....");

                        list.add("Send request plz wait...");

                        ss = new ServerSocket(1051);//some port number, better be above 1000

                        s = ss.accept();

                        br = new BufferedReader(new InputStreamReader(s.getInputStream()));

                        bw = new BufferedWriter(new OutputStreamWriter(s.getOutputStream()));

                        bw.write("Hi!?");                       

                        bw.newLine();

                        bw.flush();

                        Thread th;

                        th = new Thread(this);

                        th.start();

                                               

                                               

                                }catch(Exception e){System.out.println("Error:"+e);}

                }

        public void run()

                {

                while (true)

                                {

                        try                      

                        {       showStatus("connected....");

                                list.add("R: "+br.readLine());

                                list.select(list.getItemCount()-1);

                              

                        }catch (Exception e){System.out.println("Error:"+e);}

                                }

                }

       

               

        public void actionPerformed(ActionEvent ae)

                {

                 if (ae.getSource().equals(exitBut))

                                                 System.exit(0);

                 else

                 {

                        try

                        {                               

                                bw.write(text.getText());

                                list.add("S: "+text.getText());

                                showStatus("Data sent...");

                                list.select(list.getItemCount()-1);

                                bw.newLine();bw.flush();                               

                                text.setText("");

                        }catch(Exception x){System.out.println("Error:"+x);}

                                 }

                                                                 

                }

               

}

First of all start server then client by executing Server.java and Client.java

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