Posts: 237
Threads: 235
Joined: Oct 2009
Abstract
This is a LAN Messenger designed to function in a heterogeneous network containing mainly machine running on windows-based and Linux-based machines on which the Java Virtual Machine( JVM) is running. The main reason for taking up such a project was the lack of a simple LAN Messenger which works in a heterogeneous network. The obvious choice of the programming language was JAVA in which the compiled byte codes can be interpreted on any machine running the JVM. Moreover, the product is based on a peer-to-peer architecture rather than the conventional Client-Server architecture.
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Posts: 1,149
Threads: 370
Joined: Jun 2010
LAN Chat
The LAN Chat uses same network protocol like a Win popup LAN Messenger, Office Popup and Net Send GUI. So you can chat with users of Win popup LAN Messenger and receive private messages from users of Office Popup and Net Send GUI. Silent installation is useful for network administrators who wish to install LAN Chat without user intervention so they can perform the operation quickly over any number of computers..
Code:
This file contains GUI mode to send & receive message.USER1.java contains object of SendMessage.java & ReceiveMessage.java.This two file have to compile first.
USER1.java send message to USER2.java. To run this file , first compile it In Command prompt write
C:\>javac USER1.java
to run this file
C:\>java USER1
The source code is :
import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;
import java.awt.GridLayout;
import java.awt.event.KeyAdapter;
import java.awt.event.FocusAdapter;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.event.FocusEvent;
import java.awt.event.KeyEvent;
public class USER1 extends JFrame implements ActionListener , Runnable
{
JTextField text_field;
JTextArea text_area;
JButton send,receive;
ReceiveMessage rm;
SendMessage sm;
Thread t=null;
boolean flag;
public USER1()
{
try{
rm = new ReceiveMessage();
sm = new SendMessage();
}catch(Exception e){}
setLayout(new FlowLayout());
setTitle("USER1");
text_area=new JTextArea(15,40);
text_area.setEditable(false);
JScrollPane scroll = new JScrollPane(text_area);
add(scroll);
text_field=new JTextField(20);
text_field.addKeyListener(new KeyAdapter()
{
public void keyPressed(KeyEvent ke)
{
if(ke.getKeyCode() == KeyEvent.VK_ENTER)
{
try{
String msg = new String(getTitle());
msg = msg + " : ";
msg = msg + text_field.getText();
sm.sendMessage(msg);
text_area.append( "\n " + msg);
text_field.setText("");
}catch(Exception e){}
}
}
});
addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent we)
{
flag=true;
}
});
add(text_field);
send=new JButton("Send");
send.setMnemonic('S');
send.addActionListener(this);
add(send);
setSize(500,350);
setLocationRelativeTo(null);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setResizable(false);
setVisible(true);
flag=false;
t=new Thread(this);
t.start();
}
public void run()
{
for(;;)
{
try{
String message=rm.getMessage();
if(!message.equalsIgnoreCase("null_value"))
{text_area.append( "\n " + message);}
if(flag)
break;
}catch(Exception e){}
}
}
public void actionPerformed(ActionEvent ae)
{
if(ae.getSource()==send)
{
try{
String msg = new String(getTitle());
msg = msg + " : ";
msg = msg + text_field.getText();
sm.sendMessage(msg);
text_area.append( "\n " + msg);
text_field.setText("");
text_field.requestFocus();
}catch(Exception e){}
}
}
public static void main(String[] args)
{
USER1 u1 = new USER1();
u1.text_field.requestFocus();
}
}
