Chat Messenger Java Project Code
The Project “Chat Messenger Java Project Code” is an example of Java Chat App. If you are a student or Java Beginner and want to learn how to develop Chat Messenger in Java, here It is “Chat Messenger Java Project Code” for you. It is very simple project to learn. I’ll try to tell you all details about Chat Messenger Java Project Code.
APIs used in this Project
-
Swing
-
AWT
-
IO and NET
So using these APIs we are going to develop project. This Project contains two way communication like “Sever – to – Client” and “Client – to – Server” Chat. For the Server Client chat purpose I’m using socket programming for communication between two applications.
Socket Programming
A Socket is a computer network programming technology, It is a link between two running programs over the network.
Server: A server is an application, which runs on specific computer and has a socket that is bound to port. It waits and listens to socket on specific address and port number.
Client: A client is also an application. It knows the host-name of the server and the port number on which server is listening.
Sever App Development in “Chat Messenger Java Project Code project”
UserName Input Screen in “Chat Messenger Java Project Code project”
It takes input for User Name for the Server App. It will be shown to the Client App while chatting.
userName = JOptionPane.showInputDialog("User Name (Server)");
Console shows IP address in “Chat Messenger Java Project Code project”
server = new ServerSocket(8888); System.out.println(server.getInetAddress().getLocalHost());
Chat Window Screen in “Chat Messenger Java Project Code project”
public JavaServer() {
super("Java Server");
setBounds(0, 0, 407, 495);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setResizable(false);
setLayout(null);
msgRec.setEditable(false);
msgRec.setBackground(Color.BLACK);
msgRec.setForeground(Color.WHITE);
msgRec.addFocusListener(this);
msgRec.setText("");
msgRec.setWrapStyleWord(true);
msgRec.setLineWrap(true);
pane2 = new JScrollPane(msgRec);
pane2.setBounds(0, 0, 400, 200);
pane2.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
add(pane2);
msgSend.setBackground(Color.LIGHT_GRAY);
msgSend.setForeground(Color.BLACK);
msgSend.setLineWrap(true);
msgSend.setWrapStyleWord(true);
msgSend.setText("Write Message here");
msgSend.addFocusListener(this);
msgSend.addKeyListener(this);
pane1 = new JScrollPane(msgSend);
pane1.setBounds(0, 200, 400, 200);
pane1.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
add(pane1);
send.setBounds(0, 400, 400, 40);
add(send);
send.addActionListener(this);
bar.add(messanger);
messanger.add(logOut);
logOut.addActionListener(this);
bar.add(help);
help.add(s_keys);
s_keys.addActionListener(this);
help.add(about);
about.addActionListener(this);
setJMenuBar(bar);
addWindowFocusListener(new WindowFocusListener() {
@Override
public void windowGainedFocus(WindowEvent e) {
if (!msgRec.getText().equals("")) {
System.out.println("Yes Focus");
writer.println("\t<<<" + userName + ": Focusing to Comunication>>>");
writer.flush();
}
}
@Override
public void windowLostFocus(WindowEvent e) {
if (!msgRec.getText().equals("")) {
writer.println("\t<<<" + userName + ": Ignoring to Comunication>>>");
writer.flush();
}
}
});
if ((userName) != null) {
setVisible(true);
} else {
System.exit(0);
}
}
Complete Sever App Code in “Chat Messenger Java Project Code project”
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.WindowEvent;
import java.awt.event.WindowFocusListener;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.text.DefaultCaret;
public class JavaServer extends JFrame implements ActionListener, KeyListener,
FocusListener {
// Extra variables
static String message = "";
static String userName = "";
// Networking Variables
static ServerSocket server = null;
static Socket socket = null;
static PrintWriter writer = null;
// // Graphics Variables
static JTextArea msgRec = new JTextArea(100, 50);
static JTextArea msgSend = new JTextArea(100, 50);
JButton send = new JButton("Send");
JScrollPane pane2, pane1;
JMenuBar bar = new JMenuBar();
JMenu messanger = new JMenu("Messanger");
JMenuItem logOut = new JMenuItem("Log Out");
JMenu help = new JMenu("Help");
JMenuItem s_keys = new JMenuItem("Shortcut Keys");
JMenuItem about = new JMenuItem("about");
public JavaServer() {
super("Java Server");
setBounds(0, 0, 407, 495);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setResizable(false);
setLayout(null);
msgRec.setEditable(false);
msgRec.setBackground(Color.BLACK);
msgRec.setForeground(Color.WHITE);
msgRec.addFocusListener(this);
msgRec.setText("");
msgRec.setWrapStyleWord(true);
msgRec.setLineWrap(true);
pane2 = new JScrollPane(msgRec);
pane2.setBounds(0, 0, 400, 200);
pane2.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
add(pane2);
msgSend.setBackground(Color.LIGHT_GRAY);
msgSend.setForeground(Color.BLACK);
msgSend.setLineWrap(true);
msgSend.setWrapStyleWord(true);
msgSend.setText("Write Message here");
msgSend.addFocusListener(this);
msgSend.addKeyListener(this);
pane1 = new JScrollPane(msgSend);
pane1.setBounds(0, 200, 400, 200);
pane1.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
add(pane1);
send.setBounds(0, 400, 400, 40);
add(send);
send.addActionListener(this);
bar.add(messanger);
messanger.add(logOut);
logOut.addActionListener(this);
bar.add(help);
help.add(s_keys);
s_keys.addActionListener(this);
help.add(about);
about.addActionListener(this);
setJMenuBar(bar);
addWindowFocusListener(new WindowFocusListener() {
@Override
public void windowGainedFocus(WindowEvent e) {
if (!msgRec.getText().equals("")) {
System.out.println("Yes Focus");
writer.println("\t<<<" + userName + ": Focusing to Comunication>>>");
writer.flush();
}
}
@Override
public void windowLostFocus(WindowEvent e) {
if (!msgRec.getText().equals("")) {
writer.println("\t<<<" + userName + ": Ignoring to Comunication>>>");
writer.flush();
}
}
});
if ((userName) != null) {
setVisible(true);
} else {
System.exit(0);
}
}
/**
* @param args
*/
public static void main(String[] args) throws Exception {
// TODO Auto-generated method stub
userName = JOptionPane.showInputDialog("User Name (Server)");
// swing thread
(new Thread(new Runnable() {
public void run() {
new JavaServer();
}
})).start();
server = new ServerSocket(8888);
System.out.println(server.getInetAddress().getLocalHost());
socket = server.accept();
msgRec.setText("Connected!");
// listening port thread
(new Thread(new Runnable() {
public void run() {
try {
BufferedReader reader = new BufferedReader(
new InputStreamReader(socket.getInputStream()));
String line = null;
boolean testFlag = true;
while ((line = reader.readLine()) != null) {
msgRec.append("\n" + line);
// Cursor Update
cursorUpdate();
}
} catch (IOException ee) {
try {
server.close();
socket.close();
} catch (IOException eee) {
eee.printStackTrace();
}
ee.printStackTrace();
}
}
})).start();
try {
writer = new PrintWriter(socket.getOutputStream(), true);
} catch (IOException e) {
try {
server.close();
socket.close();
} catch (IOException eee) {
}
}
}
// ActionEvents
@Override
public void actionPerformed(ActionEvent e) {
Object scr = e.getSource();
if (scr == send) {
sendMessage();
} else if (scr == logOut) {
System.exit(0);
} else if (scr == s_keys) {
JOptionPane.showMessageDialog(this,
"(shift+Enter) for new line while writing message"
+ "\n(ctrl+x) for quit");
} else if (scr == about) {
JOptionPane.showMessageDialog(this,
"Messanger 1.0\ndeveloped @IMCS University of Sindh");
}
}
// / KeyBoardEvents
@Override
public void keyTyped(KeyEvent e) {
}
@Override
public void keyReleased(KeyEvent e) {
}
@Override
public void keyPressed(KeyEvent e) {
if ((e.getKeyCode() == KeyEvent.VK_ENTER) && e.isShiftDown()) {
msgSend.append("\n");
} else if (e.getKeyCode() == KeyEvent.VK_ENTER) {
sendMessage();
}
else if ((e.getKeyCode() == KeyEvent.VK_X) && e.isControlDown()) {
System.exit(0);
}
}
// FocusEvents
@Override
public void focusGained(FocusEvent e) {
if (e.getSource() == msgRec) {
if (!(msgRec.getText().equals("") || msgRec.getText().equals(
"Connected!"))) {
writer.println("\t ***" + userName
+ ": The Msg is being read......***");
writer.flush();
}
} else if (e.getSource() == msgSend) {
// Set Mesg sending area clear
if (msgSend.getText().equals("Write Message here")) {
msgSend.setText("");
} else {
writer.println("\t ***" + userName
+ ": The Msg is being typed......***");
writer.flush();
}
}
}
@Override
public void focusLost(FocusEvent e) {
}
private void sendMessage() {
writer.println(userName + " :" + msgSend.getText());
writer.flush();
msgRec.append("\nMe: " + msgSend.getText());
cursorUpdate();
msgSend.setText("");
msgSend.setCaretPosition(0);
}
private static void cursorUpdate() {
// Update cursor position
DefaultCaret caret = (DefaultCaret) msgRec.getCaret();
caret.setDot(msgRec.getDocument().getLength());
DefaultCaret caret2 = (DefaultCaret) msgSend.getCaret();
caret2.setDot(msgSend.getDocument().getLength());
}
}
Client App Development in “Chat Messenger Java Project Code project”
UserName Input Screen in “Chat Messenger Java Project Code project”
userName = JOptionPane.showInputDialog("User Name (Client)");
IP address Input Screen in “Chat Messenger Java Project Code project”
iPAddress = JOptionPane.showInputDialog("Enter Server IpAddress");
Client Chat Window Input in “Chat Messenger Java Project Code project”
public JavaClient() {
super("Java Client");
setBounds(0, 0, 407, 495);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setResizable(false);
setLayout(null);
msgRec.setEditable(false);
msgRec.setBackground(Color.BLACK);
msgRec.setForeground(Color.WHITE);
msgRec.addFocusListener(this);
msgRec.setText("");
msgRec.setWrapStyleWord(true);
msgRec.setLineWrap(true);
pane2 = new JScrollPane(msgRec);
pane2.setBounds(0, 0, 400, 200);
pane2.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
add(pane2);
msgSend.setBackground(Color.LIGHT_GRAY);
msgSend.setForeground(Color.BLACK);
msgSend.setLineWrap(true);
msgSend.setWrapStyleWord(true);
msgSend.setText("Write Message here");
msgSend.addFocusListener(this);
msgSend.addKeyListener(this);
pane1 = new JScrollPane(msgSend);
pane1.setBounds(0, 200, 400, 200);
pane1.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
add(pane1);
send.setBounds(0, 400, 400, 40);
add(send);
send.addActionListener(this);
bar.add(messanger);
messanger.add(logOut);
logOut.addActionListener(this);
bar.add(help);
help.add(s_keys);
s_keys.addActionListener(this);
help.add(about);
about.addActionListener(this);
setJMenuBar(bar);
addWindowFocusListener(new WindowFocusListener() {
@Override
public void windowGainedFocus(WindowEvent e) {
if (!msgRec.getText().equals("")) {
System.out.println("Yes Focus");
writer.println("\t<<<" + userName + ": Focusing to Comunication>>>");
writer.flush();
}
}
@Override
public void windowLostFocus(WindowEvent e) {
if (!msgRec.getText().equals("")) {
writer.println("\t<<<" + userName + ": Ignoring to Comunication>>>");
writer.flush();
}
}
});
if ((userName) != null) {
setVisible(true);
} else {
System.exit(0);
}
}
Full Code for Client App in “Chat Messenger Java Project Code project”
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.WindowEvent;
import java.awt.event.WindowFocusListener;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.text.DefaultCaret;
public class JavaClient extends JFrame implements ActionListener, KeyListener,
FocusListener {
// Extra variables
static String message = "";
static String userName = "";
static String iPAddress = null;
// Networking Variables
static Socket socket = null;
static PrintWriter writer = null;
// // Graphics Variables
static JTextArea msgRec = new JTextArea(100, 50);
static JTextArea msgSend = new JTextArea(100, 50);
JButton send = new JButton("Send");
JScrollPane pane2, pane1;
JMenuBar bar = new JMenuBar();
JMenu messanger = new JMenu("Messanger");
JMenuItem logOut = new JMenuItem("Log Out");
JMenu help = new JMenu("Help");
JMenuItem s_keys = new JMenuItem("Shortcut Keys");
JMenuItem about = new JMenuItem("about");
public JavaClient() {
super("Java Client");
setBounds(0, 0, 407, 495);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setResizable(false);
setLayout(null);
msgRec.setEditable(false);
msgRec.setBackground(Color.BLACK);
msgRec.setForeground(Color.WHITE);
msgRec.addFocusListener(this);
msgRec.setText("");
msgRec.setWrapStyleWord(true);
msgRec.setLineWrap(true);
pane2 = new JScrollPane(msgRec);
pane2.setBounds(0, 0, 400, 200);
pane2.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
add(pane2);
msgSend.setBackground(Color.LIGHT_GRAY);
msgSend.setForeground(Color.BLACK);
msgSend.setLineWrap(true);
msgSend.setWrapStyleWord(true);
msgSend.setText("Write Message here");
msgSend.addFocusListener(this);
msgSend.addKeyListener(this);
pane1 = new JScrollPane(msgSend);
pane1.setBounds(0, 200, 400, 200);
pane1.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
add(pane1);
send.setBounds(0, 400, 400, 40);
add(send);
send.addActionListener(this);
bar.add(messanger);
messanger.add(logOut);
logOut.addActionListener(this);
bar.add(help);
help.add(s_keys);
s_keys.addActionListener(this);
help.add(about);
about.addActionListener(this);
setJMenuBar(bar);
addWindowFocusListener(new WindowFocusListener() {
@Override
public void windowGainedFocus(WindowEvent e) {
if (!msgRec.getText().equals("")) {
System.out.println("Yes Focus");
writer.println("\t<<<" + userName + ": Focusing to Comunication>>>");
writer.flush();
}
}
@Override
public void windowLostFocus(WindowEvent e) {
if (!msgRec.getText().equals("")) {
writer.println("\t<<<" + userName + ": Ignoring to Comunication>>>");
writer.flush();
}
}
});
if ((userName) != null) {
setVisible(true);
} else {
System.exit(0);
}
}
/**
* @param args
*/
public static void main(String[] args) throws Exception {
// TODO Auto-generated method stub
userName = JOptionPane.showInputDialog("User Name (Client)");
iPAddress = JOptionPane.showInputDialog("Enter Server IpAddress");
// swing thread
(new Thread(new Runnable() {
public void run() {
new JavaClient();
}
})).start();
socket = new Socket(iPAddress, 8888);
msgRec.setText("Connected!");
// listening port thread
(new Thread(new Runnable() {
public void run() {
try {
BufferedReader reader = new BufferedReader(
new InputStreamReader(socket.getInputStream()));
String line = null;
boolean testFlag = true;
while ((line = reader.readLine()) != null) {
msgRec.append("\n" + line);
cursorUpdate();
if (!reader.ready()) {
testFlag = true;
}
}
} catch (IOException ee) {
try {
socket.close();
} catch (IOException eee) {
eee.printStackTrace();
}
ee.printStackTrace();
}
}
})).start();
try {
writer = new PrintWriter(socket.getOutputStream(), true);
} catch (IOException e) {
try {
socket.close();
} catch (IOException eee) {
}
}
}
// ActionEvents
@Override
public void actionPerformed(ActionEvent e) {
Object scr = e.getSource();
if (scr == send) {
sendMessage();
} else if (scr == logOut) {
System.exit(0);
} else if (scr == s_keys) {
JOptionPane.showMessageDialog(this,
"(shift+Enter) for new line while writing message"
+ "\n(ctrl+x) for quit");
} else if (scr == about) {
JOptionPane.showMessageDialog(this,
"Messanger 1.0\ndeveloped @IMCS University of Sindh");
}
}
// / KeyBoardEvents
@Override
public void keyTyped(KeyEvent e) {
}
@Override
public void keyReleased(KeyEvent e) {
}
@Override
public void keyPressed(KeyEvent e) {
if ((e.getKeyCode() == KeyEvent.VK_ENTER) && e.isShiftDown()) {
msgSend.append("\n");
} else if (e.getKeyCode() == KeyEvent.VK_ENTER) {
sendMessage();
}
else if ((e.getKeyCode() == KeyEvent.VK_X) && e.isControlDown()) {
System.exit(0);
}
}
// FocusEvents
@Override
public void focusGained(FocusEvent e) {
if (e.getSource() == msgRec) {
if (!(msgRec.getText().equals("") || msgRec.getText().equals(
"Connected!"))) {
writer.println("\t ***" + userName
+ ": The Msg is being read......***");
writer.flush();
}
} else if (e.getSource() == msgSend) {
// Set Mesg sending area clear
if (msgSend.getText().equals("Write Message here")) {
msgSend.setText("");
} else {
writer.println("\t ***" + userName
+ ": The Msg is being typed......***");
writer.flush();
}
}
}
@Override
public void focusLost(FocusEvent e) {
}
private void sendMessage() {
writer.println(userName + " :" + msgSend.getText());
msgRec.append("\nMe: " + msgSend.getText());
writer.flush();
cursorUpdate();
msgSend.setText("");
msgSend.setCaretPosition(0);
}
private static void cursorUpdate() {
// Update cursor position
DefaultCaret caret = (DefaultCaret) msgRec.getCaret();
caret.setDot(msgRec.getDocument().getLength());
DefaultCaret caret2 = (DefaultCaret) msgSend.getCaret();
caret2.setDot(msgSend.getDocument().getLength());
}
}
// A Java Client program will take a Server Ip address
line 246 of the JavaServer says error… Id like to understand hhow that is arising