| © 2014 Firstsoft Technologies (P) Limited. | login | Hi 'Guest'
|
Home | SiteMap | Contact Us | Disclaimer |
 |
||||||
Quick Links
Home ► Lab Exercise ► Network Lab Exercise Programs► Java WindowChat Program▼
Java WindowChat Program: |
|
import java.awt.*;
import java.awt.event.*;
import java.net.*;
import java.io.*;
public class WindowChat extends Frame
implements ActionListener, Runnable
{
public void actionPerformed(ActionEvent event)
{
if ( event.getActionCommand().equals("Exit") )
System.exit(0);
if ( event.getActionCommand().equals("Config") )
{
ConfigDialog d = new ConfigDialog(this, hostname, portnum);
d.show();
if ( d.getResult().equals("Connect!") )
{
hostname = d.getHostName();
portnum = d.getPortNum();
try
{
if ( host != null )
{
reader.destroy();
host.close();
}
host = new Socket(hostname, portnum);
sender = new PrintWriter(host.getOutputStream(), true);
reader = new Thread(this);
reader.start();
}
catch (Exception err)
{
Dialog derr = new ErrorDialog(this, err);
derr.show();
derr.dispose();
}
}
d.dispose();
}
if ( event.getActionCommand().equals("Send!") )
try
{
sender.println(msg.getText());
msg.setText("");
}
catch (Exception err)
{
Dialog derr = new ErrorDialog(this, err);
derr.show();
derr.dispose();
}
}
public void run()
{
try
{
BufferedReader r = new BufferedReader(new InputStreamReader(host.getInputStream()));
while (true)
{
String line = r.readLine();
history.add(hostname+":"+line);
}
}
catch (Exception err)
{
Dialog derr = new ErrorDialog(this, err);
derr.show();
derr.dispose();
}
}
public WindowChat()
{
addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent e){ System.exit(0); }
});
//---Window layout
setSize(600,300);
setBackground(new Color(225,225,225));
setLayout(new BorderLayout());
Panel p = new Panel();
p.add(new Label("Message:", Label.RIGHT));
p.add(msg);
Button b = new Button("Send!");
b.addActionListener(this);
p.add(b);
add(p, "North");
add(history, "Center");
//---Configure Menu
MenuBar mb = new MenuBar();
Menu m = new Menu("System");
MenuItem mi = new MenuItem("Config");
mi.addActionListener(this);
m.add(mi);
m.addSeparator();
mi = new MenuItem("Exit");
mi.addActionListener(this);
m.add(mi);
mb.add(m);
setMenuBar(mb);
}
public static void main(String[] args)
{
WindowChat wc = new WindowChat();
wc.show();
}
private TextField msg = new TextField(50);
private List history = new List();
private Socket host;
private String hostname;
private int portnum;
private Thread reader;
private PrintWriter sender;
}
class ConfigDialog extends Dialog
implements ActionListener
{
public ConfigDialog(Frame parent, String name, int port)
{
super(parent, "Config Window Chat", true);
addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent e){ result=""; setVisible(false);}
});
hostname.setText(name);
portnum.setText(String.valueOf(port));
setSize(200,200);
setLayout(new GridLayout(3,2));
Panel p = new Panel(new FlowLayout(FlowLayout.RIGHT));
p.add(new Label("Host:", Label.RIGHT));
add(p);
p = new Panel();
p.add(hostname);
add(p);
p = new Panel(new FlowLayout(FlowLayout.RIGHT));
p.add(new Label("Port:", Label.RIGHT));
add(p);
p = new Panel();
p.add(portnum);
add(p);
p = new Panel(new FlowLayout(FlowLayout.CENTER));
Button b = new Button("Connect!");
b.addActionListener(this);
p.add(b);
add(p);
p = new Panel(new FlowLayout(FlowLayout.CENTER));
b = new Button("Cancel");
b.addActionListener(this);
p.add(b);
add(p);
}
public void actionPerformed(ActionEvent event)
{
result = event.getActionCommand();
setVisible(false);
}
public String getHostName() { return hostname.getText(); }
public int getPortNum()
{
Integer port = new Integer(portnum.getText());
return port.intValue();
}
public String getResult() { return result; }
private TextField hostname = new TextField(10);
private TextField portnum = new TextField(5);
private String result;
}
SAMPLE INPUT OUTPUT:
|
⇓Student Projects⇓
⇑Student Projects⇑
 |