├── Client.java
├── ClientTest.java
├── README.md
├── Server.java
└── ServerTest.java


/Client.java:
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  1 | package server_client;
  2 | 
  3 | import java.io.*;
  4 | import java.lang.*;
  5 | import java.net.*;
  6 | import java.awt.BorderLayout;
  7 | import java.awt.event.*;
  8 | import javax.swing.*;
  9 | 
 10 | public class Client extends JFrame
 11 | {
 12 | 	private JTextField usertext;
 13 | 	private JTextArea chatwindow;
 14 | 	private ObjectOutputStream output;
 15 | 	private ObjectInputStream input;
 16 | 	private Socket connection;
 17 | 	private String serverIP;
 18 | 	
 19 | 	public Client(String host)
 20 | 	{
 21 | 		super("CLIENT");
 22 | 		serverIP = host;
 23 | 		usertext = new JTextField();
 24 | 		usertext.setEditable(false);
 25 | 		usertext.addActionListener(
 26 | 				new ActionListener()
 27 | 				{
 28 | 					public void actionPerformed(ActionEvent event)
 29 | 					{
 30 | 						sendmessage(event.getActionCommand());
 31 | 						usertext.setText("");
 32 | 					}
 33 | 				});
 34 | 		add(usertext,BorderLayout.SOUTH);
 35 | 		chatwindow = new JTextArea();
 36 | 		chatwindow.setEditable(false);
 37 | 		add(new JScrollPane(chatwindow),BorderLayout.CENTER);
 38 | 		setSize(1280,720);
 39 | 		setVisible(true);
 40 | 	}
 41 | 	public void startRunning() throws IOException  
 42 | 	{
 43 | 		try
 44 | 		{
 45 | 			connection();
 46 | 			setup();
 47 | 			chatting();
 48 | 		}
 49 | 		catch(EOFException e)
 50 | 		{
 51 | 			showmessage("\n Client ended the connection!");
 52 | 		}
 53 | 		catch(IOException e)
 54 | 		{
 55 | 			e.printStackTrace();
 56 | 		}
 57 | 		finally
 58 | 		{
 59 | 			closeall();
 60 | 		}
 61 | 	}
 62 | 	private void connection() throws IOException
 63 | 	{
 64 | 		showmessage("COnnecting..\n");
 65 | 		connection = new Socket(InetAddress.getByName(serverIP),3000);
 66 | 		showmessage("Connected to "+connection.getInetAddress().getHostName()+ "\n");
 67 | 	}
 68 | 	private void setup() throws IOException
 69 | 	{
 70 | 		output = new ObjectOutputStream(connection.getOutputStream());
 71 | 		output.flush();
 72 | 		input = new ObjectInputStream(connection.getInputStream());
 73 | 	}
 74 | 	private void chatting() throws IOException
 75 | 	{
 76 | 		String message = "Connected!";
 77 | 		sendmessage(message);
 78 | 		canType(true);
 79 | 		do
 80 | 		{
 81 | 			try
 82 | 			{
 83 | 				message = (String) input.readObject();
 84 | 				showmessage(message+"\n");
 85 | 			}
 86 | 			catch(ClassNotFoundException e)
 87 | 			{
 88 | 				showmessage("commmand not recognized\n");
 89 | 			}
 90 | 		}
 91 | 		while(!message.equals("Client - End"));
 92 | 	}
 93 | 	private void closeall() throws IOException
 94 | 	{
 95 | 		showmessage("Closing connection...\n");
 96 | 		canType(false);
 97 | 		try
 98 | 		{
 99 | 			output.close();
100 | 			input.close();
101 | 			connection.close();
102 | 		}
103 | 		catch(IOException e)
104 | 		{
105 | 			e.printStackTrace();
106 | 		}
107 | 	}
108 | 	private void sendmessage(String message)
109 | 	{
110 | 		try
111 | 		{
112 | 			output.writeObject("CLIENT "+message);
113 | 			output.flush();
114 | 			showmessage("CLINET "+message+"\n");
115 | 		}
116 | 		catch(IOException e)
117 | 		{
118 | 			chatwindow.append("Error - message cannot be sent");
119 | 		}
120 | 	}
121 | 	private void showmessage(final String text)
122 | 	{
123 | 		SwingUtilities.invokeLater(
124 | 				new Runnable()
125 | 				{
126 | 					public void run()
127 | 					{
128 | 						chatwindow.append(text);
129 | 					}
130 | 				});
131 | 	}
132 | 	private void canType(final boolean tof)
133 | 	{
134 | 		SwingUtilities.invokeLater(
135 | 				new Runnable()
136 | 				{
137 | 					public void run()
138 | 					{
139 | 						usertext.setEditable(tof);
140 | 					}
141 | 				});
142 | 	}
143 | }
144 | 


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/ClientTest.java:
--------------------------------------------------------------------------------
 1 | package server_client;
 2 | import java.io.IOException;
 3 | 
 4 | import javax.swing.JFrame;
 5 | public class ClientTest 
 6 | {
 7 | 
 8 | 	public static void main(String[] args) throws IOException 
 9 | 	{
10 | 		Client homeAddress = new Client("127.0.0.1");
11 | 		homeAddress.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
12 | 		homeAddress.startRunning();
13 | 		
14 | 	}
15 | 
16 | }
17 | 


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/README.md:
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1 | # SERVER CLIENT CHATBOT
2 | Basic Java based server client chatbot application.
3 | 
4 | ![Screenshot (78)](https://user-images.githubusercontent.com/44341534/80281662-60c32780-872a-11ea-8ea3-595ac43064b2.png)
5 | 
6 | 


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/Server.java:
--------------------------------------------------------------------------------
  1 | package server_client;
  2 | import java.io.*;
  3 | import java.net.*;
  4 | import java.awt.*;
  5 | import java.awt.event.*;
  6 | import javax.swing.*;
  7 | 
  8 | public class Server extends JFrame
  9 | {
 10 | 	private JTextField usertext;
 11 | 	private JTextArea chatwindow;
 12 | 	private ObjectOutputStream output;
 13 | 	private ObjectInputStream input;
 14 | 	private ServerSocket server;
 15 | 	private Socket connection;
 16 | 	
 17 | 	public Server()
 18 | 	{
 19 | 		super("SERVER");
 20 | 		usertext = new JTextField();
 21 | 		usertext.setEditable(false);
 22 | 		usertext.addActionListener(
 23 | 				new ActionListener()
 24 | 				{
 25 | 					public void actionPerformed(ActionEvent event)
 26 | 					{
 27 | 						sendMessage(event.getActionCommand());
 28 | 						usertext.setText("");
 29 | 					}
 30 | 				});
 31 | 		add(usertext,BorderLayout.SOUTH);
 32 | 		chatwindow = new JTextArea();
 33 | 		chatwindow.setEditable(false);
 34 | 		add(new JScrollPane(chatwindow));
 35 | 		setSize(1280,720);
 36 | 		setVisible(true);
 37 | 	}
 38 | 	public void startRunning()
 39 | 		{
 40 | 			try
 41 | 			{
 42 | 				server = new ServerSocket(3000,20);
 43 | 				while(true)
 44 | 				{
 45 | 					try
 46 | 					{
 47 | 						connection();
 48 | 						setup();
 49 | 						chatting();
 50 | 					}
 51 | 					catch(IOException e)
 52 | 					{
 53 | 						showMessage("\n Server ended the connection! ");
 54 | 					}
 55 | 					finally
 56 | 					{
 57 | 						closeAll();
 58 | 					}
 59 | 				}
 60 | 			}
 61 | 			catch(IOException e)
 62 | 			{
 63 | 				e.printStackTrace();
 64 | 			}
 65 | 		}
 66 | 	private void connection() throws IOException
 67 | 		{
 68 | 			showMessage("waiting for the connection..\n");
 69 | 			connection = server.accept();
 70 | 			showMessage(connection.getInetAddress().getHostName()+" connection");
 71 | 		}
 72 | 	private void setup() throws IOException
 73 | 		{
 74 | 			output = new ObjectOutputStream(connection.getOutputStream());
 75 | 			output.flush();
 76 | 			input = new ObjectInputStream(connection.getInputStream());
 77 | 			showMessage("Everything is setup!\n");
 78 | 		}
 79 | 	private void chatting() throws IOException
 80 | 		{
 81 | 			String message = "Connected!";
 82 | 			sendMessage(message);
 83 | 			canType(true); //a lock on text box so that only one client can talk to server at same time not mulitplle
 84 | 			do
 85 | 			{
 86 | 				try
 87 | 				{
 88 | 					message = (String) input.readObject();
 89 | 					showMessage(message + "\n");
 90 | 				}
 91 | 				catch(ClassNotFoundException e)
 92 | 				{
 93 | 					showMessage("commmand not recognized\n");
 94 | 				}
 95 | 			}
 96 | 			while(!message.equals("Client - End"));
 97 | 		}
 98 | 	private void closeAll() throws IOException
 99 | 		{
100 | 			showMessage("Closing connection...\n");
101 | 			canType(false);
102 | 			try
103 | 			{
104 | 				output.close();
105 | 				input.close();
106 | 				connection.close();
107 | 			}
108 | 			catch(IOException e)
109 | 			{
110 | 				e.printStackTrace();
111 | 			}
112 | 		}
113 | 	private void sendMessage(String message)
114 | 		{
115 | 			try
116 | 			{
117 | 				output.writeObject("SERVER "+message);
118 | 				output.flush();
119 | 				showMessage("SERVER "+message+"\n");
120 | 			}
121 | 			catch(IOException e)
122 | 			{
123 | 				chatwindow.append("Error - message cannot be sent");
124 | 			}
125 | 		}
126 | 	private void showMessage(final String text)
127 | 		{
128 | 			SwingUtilities.invokeLater(
129 | 					new Runnable()
130 | 					{
131 | 						public void run()
132 | 						{
133 | 							chatwindow.append(text);
134 | 						}
135 | 					});
136 | 		}
137 | 	private void canType(final boolean tof)
138 | 		{
139 | 			SwingUtilities.invokeLater(
140 | 					new Runnable()
141 | 					{
142 | 						public void run()
143 | 						{
144 | 							usertext.setEditable(tof);
145 | 						}
146 | 					});
147 | 		}
148 | }
149 | 


--------------------------------------------------------------------------------
/ServerTest.java:
--------------------------------------------------------------------------------
 1 | package server_client;
 2 | import javax.swing.JFrame;
 3 | 
 4 | public class ServerTest 
 5 | {
 6 | 
 7 | 	public static void main(String[] args) 
 8 | 	{
 9 | 		Server Host = new Server();
10 | 		Host.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
11 | 		Host.startRunning();
12 | 	}
13 | 
14 | }
15 | 


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