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package tcpchatapp;
import java.awt.*;
import java.net.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import java.io.*;
class guiUdp extends JFrame
{
public JButton sdB; //sendButton=sdB
public JTextArea rA; //rxArea=rA
public JTextField tax; //txtArea=tax
public JScrollPane roll; //pane = roll
public Container cot; //container = cot
public guiUdp (String title)
{
super (title);
cot = getContentPane ();
cot.setLayout (new FlowLayout());
tax = new JTextField (40);
rA = new JTextArea (6, 40);
rA.setEditable (false);
roll = new JScrollPane (rA);
sdB = new JButton ("Send");
sdB.setEnabled(false);
cot.add (roll);
cot.add (tax);
cot.add (sdB);
}
}
public class udpJavaChat extends guiUdp
{
InetAddress ip = null;
static int port;
public ButtonHandler bttnH;
DatagramSocket socket;
public udpJavaChat (String title) throws IOException
{
super (title);
bttnH = new ButtonHandler ();
sdB.addActionListener (bttnH);
socket = new DatagramSocket (2222);
}
private class ButtonHandler implements ActionListener
{
public void actionPerformed (ActionEvent event) //throws IOException
{
tx ();
}
}
// Transmit Message
public void tx ()
{
try
{
byte[] buf = new byte[256];
String outputLine = rA.getText ();
buf = outputLine.getBytes ();
rA.setText (rA.getText() + "J> " + outputLine + "n");
DatagramPacket packet = new DatagramPacket (buf, buf.length, ip, port);
socket.send (packet);
}
catch (IOException e)
{
}
}
// Receive Message
public void rx () throws IOException
{
DatagramPacket packet;
byte[] buf = new byte[256];
while (true)
{
packet = new DatagramPacket (buf, buf.length);
socket.receive (packet);
ip = packet.getAddress ();
port = packet.getPort ();
sdB.setEnabled(true);
String received = new String (packet.getData());
rA.setText (rA.getText() + "A> " + received + "n");
}
}
public static void main (String[] args) throws IOException
{
udpJavaChat uc = new udpJavaChat ("Chat UDP P2P Program");
uc.pack ();
uc.setSize (500, 200);
uc.setVisible (true);
uc.rx ();
}
}
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