Slip 18 - B) Write a java program for simple standalone chatting application.

Solution:

//server file

 
import java.awt.event.*;
import java.awt.*;
import java.net.*;
import java.io.*;
 
class MyServer extends Frame implements ActionListener
{
                static TextField t1=new TextField(20);
                static Button b1=new Button("Send");
                static TextArea ta=new TextArea(5,20);
                static DataOutputStream dos;
                static DataInputStream dis;
                static ServerSocket st;
                static Socket s;
                static String r;
                MyServer()
                {
                                setLayout(new FlowLayout());
                                add(t1);add(b1);add(ta);
                                b1.addActionListener(this);                        
                                setVisible(true);
                                setSize(300,300);
                }
                public void actionPerformed(ActionEvent e)
                {
                                String cmd=e.getActionCommand();
                                if(cmd.equalsIgnoreCase("send"))
                                {
                                                try
                                                {
                                                r=t1.getText();
                                                dos.writeUTF(r);
                                                }
                                                catch(Exception p)
                                                {
                                                }
                                }
                }
                public static void main(String[] d ) throws IOException
                {
                                new MyServer();
                               
                                st=new ServerSocket(1281);       
                                s=st.accept();
                                dos=new DataOutputStream(s.getOutputStream());
                                dis=new DataInputStream(s.getInputStream());
                                while(true)
                                {
                                                r=dis.readUTF();
                                                ta.append("client:"+r+"\n");
                                }
                }
               
}

//client file

 
import java.awt.event.*;
import java.awt.*;
import java.net.*;
import java.io.*;
 
class MyClient extends Frame implements ActionListener
{
                static TextField t1=new TextField(20);
                static Button b1=new Button("Send");
                static TextArea ta=new TextArea(5,20);
                static DataOutputStream dos;
                static DataInputStream dis;
                static Socket s;
                static String r;
                MyClient()
                {
                                setLayout(new FlowLayout());
                                add(t1);add(b1);add(ta);
                                b1.addActionListener(this);                        
                                setVisible(true);
                                setSize(300,300);
 
                }
                public void actionPerformed(ActionEvent e)
                {
                                if(e.getSource()==b1)
                                {
                                 try
                                {
                                                r=t1.getText();
                                                dos.writeUTF(r);
                                }
                                catch(Exception p)
                                {
                                }
                                }
                }
                public static void main(String[] d ) throws IOException
                {
                                MyClient x= new MyClient();
                               
                               
                                s=new Socket("localhost",1281);
                                dos=new DataOutputStream(s.getOutputStream());
                                dis=new DataInputStream(s.getInputStream());
                                while(true)
                                {
                                                r=dis.readUTF();
                                                ta.append("Server:"+r+"\n");
                                }
                }
               
}