/**
*
* Chat.java
* 一個基于UDP數據廣播的局域網絡會議程序
*
* 作者：qyjohn@SMTH
*
*/
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;
import java.security.*;
public class Chat extends Frame implements ActionListener
{
TextField OutMsg;
TextArea InMsg;
Broadcast Device;
String HostName = "Unknown Host: ";
/**
*
* Constructor
*
*/
public Chat()
{
add(CreateGui());
addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
});
try
{
InetAddress LocalHost = InetAddress.getLocalHost();
HostName = LocalHost.getHostName() + ": ";
} catch (UnknownHostException e) {}
Device = new Broadcast();
Receiver Recv = new Receiver(Device, InMsg);
Recv.start();
}
/**
*
* Create GUI.
*
*/
public Panel CreateGui()
{
Panel GuiPanel = new Panel();
Panel SendMsg = new Panel();
Button SendButton = new Button("Send Message");
SendButton.setActionCommand("1");
SendButton.addActionListener(this);
OutMsg = new TextField(40);
InMsg = new TextArea(15, 60);
SendMsg.setLayout(new GridLayout(1,2));
SendMsg.add(SendButton);
SendMsg.add(OutMsg);
GuiPanel.setLayout(new GridLayout(2,1));
GuiPanel.add(SendMsg);
GuiPanel.add(InMsg);
return GuiPanel;
}
/**
*
* Action processing method.
*
* @param e Action event.
*
*/
public void actionPerformed(ActionEvent e)
{
String command = e.getActionCommand();
int OutMsgID = 0;
String TextMsg;
if (command == "1")
{
TextMsg = HostName + OutMsg.getText();
Device.SendData(TextMsg);
}
}
/**
*
* Main method for porgram testing.
*
*/
public static void main(String[] args)
{
Chat window = new Chat();
window.setTitle("UDP Chat");
window.pack();
window.setVisible(true);
}
}
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