Chat Client (Java)

The following code shows you how to make a simple chat client which can be connected to LAN chat server.

Code

import java.awt.*;

import java.awt.event.*;

import java.net.*;

import java.io.*;

import javax.swing.*;

public class ChatClient extends JFrame

                        implements ActionListener {

       Socket s;

       JTextField textMsg;

       JButton btnSend;

       List list;

       Container con;

       String msg,sendMsg;

       PrintWriter pw;

      

      

       public ChatClient () {

      

       try

          {

             

              createComponents();

              s = new Socket("192.168.103.44",333);

              getMessage();

              list.addItem(msg);

             

       } catch (Exception ex) {

                     ex.printStackTrace();

              }

       }

      

       //This function reads message that is sent by server

       public void getMessage(){

      

       try

            {

             

              InputStream is = s.getInputStream();

              InputStreamReader isr = new InputStreamReader(is);

              BufferedReader br = new BufferedReader(isr);

              msg = br.readLine();

             

       } catch (Exception ex) {

                     ex.printStackTrace();

              }

       }

       //GUI

       public void createComponents() {

             

              btnSend = new JButton("Send");

              list = new List();

              textMsg = new JTextField();

              con = getContentPane();

              con.setLayout(new BorderLayout());

              con.add(list,"Center");

              con.add(btnSend,"East");

              con.add(textMsg,"South");

              setTitle("Client");

              setVisible(true);

              setSize(400,400);

              setResizable(false);

              btnSend.addActionListener(this);

             

              //Checking if user pressed "Enter Key"

              textMsg.addKeyListener(new KeyAdapter() {

                      public void keyReleased(KeyEvent ke){

                        try 

                           {

                           

                            if ( ke.getKeyCode() == KeyEvent.VK_ENTER ) {

                                               

                                 msg = textMsg.getText();

                                 OutputStream os = s.getOutputStream();

                                 pw = new PrintWriter(os,true);

                                 pw.println(msg);

                                 list.addItem("Client Says : " + msg);

                                 textMsg.setText("");

                            }

                                        

                        } catch (Exception ex) {

                               ex.printStackTrace();

  

                       }

                  }

              });

             

              setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

       }

      

      

       //If send button is pressed

       public void actionPerformed(ActionEvent e) {

      

       try

           {

      

               if ( e.getSource().equals(btnSend) ) {

                            

                         //Sending message

                         OutputStream os = s.getOutputStream();

                         pw = new PrintWriter(os,true); //true means to auto flush the stream

                         pw.println(textMsg.getText());

                         list.addItem("Client Says : " + textMsg.getText());

                         textMsg.setText("");

               }

                    

            } catch ( Exception ex ) {

                            

           }

       }

      

       public static void main(String[] args) {

             

              ChatClient cc = new ChatClient();

       }

}