/**
 * @(#)ClientApp.java
 *
 */

import java.io.*;
import java.net.*;
import java.util.*;

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class ClientApp extends JFrame implements ActionListener
{
		private Socket server;
		private JTextField txtName,txtAge,txtMessage;
		private JLabel lblName,lblAge,lblMessage;
		private JButton btnSend,btnExit;
		private ObjectOutputStream out;
		private ObjectInputStream in;
		private Person p;
		/** Creates a new instance of ClientApp */
		public ClientApp()
		{
			super("Client");
	    	txtName = new JTextField(10);
	    	txtAge = new JTextField(10);
	    	txtMessage = new JTextField(10);
	    	
	    	lblName = new JLabel("Enter Name");
	    	lblAge = new JLabel("Enter Age");
	    	lblMessage = new JLabel("Enter Message");
	    	
	    	btnSend = new JButton("Send");
	    	btnSend.addActionListener(this);
	    	btnExit = new JButton("Exit");
	    	btnExit.addActionListener(this);
	    	this.setLayout(new GridLayout(4,1,10,10));
	    	this.add(lblName);
	    	this.add(txtName);
	    	this.add(lblAge);
	    	this.add(txtAge);
	    	this.add(lblMessage);
	    	this.add(txtMessage);
	    	this.add(btnSend);
	    	this.add(btnExit);
	    	this.pack();
    	
			
		}//end of constructor
		
		public void runClient()
		{
			try
			{
				makeConnection();
				getStreams();
				processServer();
			}
			catch ( EOFException eofException )
	         {
	            JOptionPane.showMessageDialog(this,"End of file","Error",JOptionPane.ERROR_MESSAGE);
	         } // end catch
	         catch ( IOException ioException )
	         {
	            JOptionPane.showMessageDialog(this,"Error reading files","File Error",JOptionPane.ERROR_MESSAGE);
	         } // end catch
	         catch (Exception e)
	         {
	         	JOptionPane.showMessageDialog(this,"Unknown error","Error",JOptionPane.ERROR_MESSAGE);
	         }
	         finally
	         {
	            closeConnections(); // close connection
	            dispose();
	         } // end finally
		}
		public void makeConnection() throws IOException
		{
			// Attempt to establish connection to server
				server = new Socket("127.0.0.1", 12345);
			// 	server = new Socket(InetAddress.getHostName(ChatServer), 12345);
			//display message to let user know they are connected to a specific ip address
		}
		
		public void getStreams() throws IOException
		{
			out = new ObjectOutputStream(server.getOutputStream());
            out.flush();
            in = new ObjectInputStream(server.getInputStream());
            //display message showing user that streams are created
            JOptionPane.showMessageDialog(this,"Streams received","Information",JOptionPane.INFORMATION_MESSAGE);           
		}
		
		public void processServer() throws IOException 
		{          
            do
            {
            	try
            	{
            		p = new Person();
            		p = (Person)in.readObject();           		
            		displayMessage(p);
            		System.out.println(p.toString());
            		getStreams();
            	}
            	catch ( ClassNotFoundException classNotFoundException )
	            {
	            	JOptionPane.showMessageDialog(this,"Class not found","Error",JOptionPane.ERROR_MESSAGE);
	            } // end catch
	            finally
				{
					System.out.println("Process engadged from client");
				}
            }while(!txtMessage.getText().equals(".exit"));
   
		}
		
		public void sendData(Person P)
		{
			try
			{
				out.writeObject(P);
				out.flush();
				//JOptionPane.showMessageDialog(this,"Message sent","Information",JOptionPane.INFORMATION_MESSAGE);				
			}
			catch(IOException io)
			{
				JOptionPane.showMessageDialog(this,"Message sent","Sending Message",JOptionPane.INFORMATION_MESSAGE);
			}
			finally
			{
				System.out.println("Data send from server");
			}
		}
		public void displayMessage(Person P)
		{
			txtName.setText(P.GetName());
            txtAge.setText(P.GetAge());
            txtMessage.setText(P.GetMessage());			
		}
		
		public void closeConnections()
		{
			try
			{
				out.close();
	            in.close();
	            server.close();
	            dispose();
			}
			catch(IOException io)
			{
				JOptionPane.showMessageDialog(this,"Message sent","Sending Message",JOptionPane.ERROR_MESSAGE);
			}
			finally
			{
				System.out.println("Connection closed from client side");
			}
			
		}
		
		public void actionPerformed(ActionEvent ae)
		{
			if(ae.getSource() == btnSend)
			{
				txtName.setText(p.GetName());
                txtAge.setText(p.GetAge());
                txtMessage.setText(p.GetMessage());
                p.SetName(txtName.getText());
                p.SetAge(txtAge.getText());
                p.SetMessage(txtMessage.getText());
				sendData(p);
			}
			
			if(ae.getSource() == btnExit)
			{
				closeConnections();
			}
			
		}
		
		public static void main(String[] args)
		{
			ClientApp client = new ClientApp();
			client.setVisible(true);
			client.setBounds(100,200,300,200);
			client.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
			client.runClient();
		}
}

And code for the personclass

import java.io.Serializable;

public class Person implements Serializable
{
    private String Name;
    private String Message;
    private String Age;

    public Person()
    {
        Name = "";
        Message = "";
        Age = "";
    }

    public Person(String N,String A,String M)
    {
        Name = N;       
        Age = A;
        Message = M;
    }

    public void SetName(String N)
    {
        Name = N;
    }
    public void SetMessage(String M)
    {
        Message = M;
    }
    public void SetAge(String A)
    {
        Age = A;
    }

    public String GetName()
    {
        return Name;
    }
    public String GetMessage()
    {
        return Message;
    }
    public String GetAge()
    {
        return Age;
    }

    public String toString()
    {
        return String.format("\nName: %s \n Message: \n %s \n Age: %s \n",Name,Message,Age);
    }
}


Code for the server class

/**
 * @(#)ServerApp.java
 *
 */
import java.io.*;
import java.net.*;
import java.util.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class ServerApp extends JFrame implements ActionListener
{

		private ServerSocket listener;
		private Socket client;
		private JTextField txtName,txtAge,txtMessage;
		private JLabel lblName,lblAge,lblMessage; 
		private JButton btnSend,btnExit;
		private ObjectOutputStream out;
		private ObjectInputStream in;
		Person p;
		int Counter=0;
		/** Creates a new instance of ServerApp */
		public ServerApp()
		{		
			super("Server");
	    	txtName = new JTextField(10);
	    	txtAge = new JTextField(10);
	    	txtMessage = new JTextField(10);
	    	
	    	lblName = new JLabel("Enter Name");
	    	lblAge = new JLabel("Enter Age");
	    	lblMessage = new JLabel("Enter Message");
	    	
	    	btnSend = new JButton("Send");
	    	btnSend.addActionListener(this);
	    	btnExit = new JButton("Exit");
	    	btnExit.addActionListener(this);
	    	this.setLayout(new GridLayout(4,2,10,10));
	    	this.add(lblName);
	    	this.add(txtName);
	    	this.add(lblAge);
	    	this.add(txtAge);
	    	this.add(lblMessage);
	    	this.add(txtMessage);
	    	this.add(btnSend);
	    	this.add(btnExit);
	    	this.pack();
				
		}
	
			public void runServer()
			{
				
				makeConnection();
				while(true)
				{
					try
					{					
						listen();
						createStreams();						
						processClient();
					}
					catch(IOException ioe)
					{
						JOptionPane.showMessageDialog(this,"Server Terminated Connection","Error",JOptionPane.ERROR_MESSAGE);
					}
					finally
					{
						closeConnections();
						dispose();
						
					}
				}	
				
			}
			public void makeConnection()
			{				
				try
				{
					listener = new ServerSocket(12345, 10);
				}
				catch (IOException ioe)
				{
					System.out.println("IO Exception: " + ioe.getMessage());
				}
				finally
				{
					System.out.println("Connection made with client");
				}				
			}
			
			public void listen() throws IOException
			{		
				
				client = listener.accept();						
			}
			
			public void createStreams() throws IOException
			{
				out = new ObjectOutputStream(client.getOutputStream());
				out.flush();
				in = new ObjectInputStream(client.getInputStream());
				JOptionPane.showMessageDialog(this,"Streams created","Creating Streams",JOptionPane.INFORMATION_MESSAGE);
			}
			
			public void processClient()
			{
				p = new Person("Aljay","22","Hi there");
				sendData(p);		//this sets the cleint to read so no error occurs
				do
				{
					try 
	                {      
	                   p = new Person();      
	                   p = (Person)in.readObject();
	                   displayMessage(p);
	                   System.out.println(p.toString());
	                   createStreams();	
					}
					catch (IOException ioe)
					{
						System.out.println("IO Exception: " + ioe.getMessage());
					}
					catch (ClassNotFoundException cnfe)
					{
						System.out.println("Class not found: " + cnfe.getMessage());
					}
					finally
					{
						
						System.out.println("Process number" + Counter);
						Counter++;
					}
				}while(true);	
                
			}
			
			public void sendData(Person P)
			{
				try
				{
					out.writeObject(P);
					out.flush();				
				}
				catch(IOException io)
				{
					JOptionPane.showMessageDialog(this,"Error io in sendData","Error",JOptionPane.ERROR_MESSAGE);
				}
				finally
				{
					System.out.println("data send to client");
				}
			}
			
			public void displayMessage(Person P)
			{
				txtName.setText(P.GetName());
	            txtAge.setText(P.GetAge());
	            txtMessage.setText(P.GetMessage());			
			}
			
			public void closeConnections()
			{
					
					try
					{
						out.close();
						in.close();
						client.close();
						dispose();
					}
					catch (IOException ioe)						
					{
						System.out.println("IO Exception: " + ioe.getMessage());
					}
					finally
					{
						System.out.println("Connection close from server side");
					}
			}
			
			public void actionPerformed(ActionEvent ae)
			{
				if(ae.getSource() == btnSend)
				{
					//p = new Person();
					txtName.setText(p.GetName());
                    txtAge.setText(p.GetAge());
                    txtMessage.setText(p.GetMessage());
                    p.SetName(txtName.getText());
	                p.SetAge(txtAge.getText());
	                p.SetMessage(txtMessage.getText());
					sendData(p);
				}
				
				if(ae.getSource() == btnExit)
				{
					closeConnections();
				}
			}
			
			public static void main(String[] args)
			{
				// Create application
				ServerApp server = new ServerApp(/*p.SetName(txtName.getText()),p.SetAge(txtAge.getText()),p.SetMessage(txtMessage.getText())*/);
				server.setVisible(true);
				server.setBounds(100,200,300,200);
				server.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
				// Start waiting for connections
				server.runServer();
			}
}