Hey guys I am trying out “dyndns” like you said and I created an account and a host with the name lucreenliven.game-host.org.
Now I am unsure what to do next. Here are sample codes of a server and a client for a simple chat program from “Killer Java Game Programming” and I wanted to know what I need to do to get the server to run on my comp and have any other computer load the client and be able to go on?
Any help would be great.
Thanks in advance.
Note: These are just the to top levels of the codes, if you want all of the files let me know.
///////////////////////////////////////CLIENT///////////////////////////////////////////////////////////////////
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;
public class ChatClient extends JFrame implements ActionListener
{
private static final int PORT = 1234; // server details
private static final String HOST = "lucreenliven.game-host.org";//"localhost";
private Socket sock;
private PrintWriter out; // output to the server
private JTextArea jtaMesgs; // output text area
private JTextField jtfMsg; // for sending messages
private JButton jbWho; // for sending a "who" message
public ChatClient()
{
super("Chat Client");
initializeGUI();
// makeContact();
addWindowListener( new WindowAdapter() {
public void windowClosing(WindowEvent e)
{ closeLink(); }
});
setSize(300,450);
setVisible(true);
makeContact(); // change: moved so window visible before contact
} // end of ChatClient();
private void initializeGUI()
/* Text area in center, and controls below.
Controls:
- textfield for entering messages
- a "Who" button
*/
{
Container c = getContentPane();
c.setLayout( new BorderLayout() );
jtaMesgs = new JTextArea(7, 7);
jtaMesgs.setEditable(false);
JScrollPane jsp = new JScrollPane( jtaMesgs);
c.add( jsp, "Center");
JLabel jlMsg = new JLabel("Message: ");
jtfMsg = new JTextField(15);
jtfMsg.addActionListener(this); // pressing enter triggers sending of name/score
jbWho = new JButton("Who");
jbWho.addActionListener(this);
JPanel p1 = new JPanel( new FlowLayout() );
p1.add(jlMsg); p1.add(jtfMsg);
JPanel p2 = new JPanel( new FlowLayout() );
p2.add(jbWho);
JPanel p = new JPanel();
p.setLayout( new BoxLayout(p, BoxLayout.Y_AXIS));
p.add(p1); p.add(p2);
c.add(p, "South");
} // end of initializeGUI()
private void closeLink()
{
try {
out.println("bye"); // tell server that client is disconnecting
sock.close();
}
catch(Exception e)
{ System.out.println( e ); }
System.exit( 0 );
} // end of closeLink()
private void makeContact()
// contact the server and start a ChatWatcher thread
{
try {
sock = new Socket(HOST, PORT);
BufferedReader in = new BufferedReader(
new InputStreamReader( sock.getInputStream() ) );
out = new PrintWriter( sock.getOutputStream(), true ); // autoflush
new ChatWatcher(this, in).start(); // start watching for server msgs
}
catch(Exception e)
{ System.out.println(e); }
} // end of makeContact()
public void actionPerformed(ActionEvent e)
/* Either a message is to be sent or the "Who"
button has been pressed. */
{
if (e.getSource() == jbWho)
out.println("who"); // the response is read by ChatWatcher
else if (e.getSource() == jtfMsg)
sendMessage();
}
private void sendMessage()
/* Check if the user has supplied a message, then
send it to the server. */
{
String msg = jtfMsg.getText().trim();
// System.out.println("'"+msg+"'");
if (msg.equals(""))
JOptionPane.showMessageDialog( null,
"No message entered", "Send Message Error",
JOptionPane.ERROR_MESSAGE);
else {
out.println(msg);
// showMsg("Sent: " + msg + "\n");
}
} // end of sendMessage()
/*
synchronized public void showMsgFoo(String msg)
// Synchronized since this method can be called by this
// object and the URLChatWatcher thread.
{ jtaMesgs.append(msg); }
*/
public void showMsg(final String msg)
/* We're updating the messages text area, so the code should
be carried out by Swing's event dispatching thread, which is
achieved by calling invokeLater().
msg must be final to be used inside the inner class for Runnable.
showMsg() may be called by this object and the ChatWatcher
thread, but the updates are serialised by being placed in the
queue associated with the event dispatcher. This means that
there's no need to synchronize this method.
Thanks to Rachel Struthers (rmstruthers@mn.rr.com)
*/
{
// System.out.println("showMsg(): " + msg);
Runnable updateMsgsText = new Runnable() {
public void run()
{ jtaMesgs.append(msg); // append message to text area
jtaMesgs.setCaretPosition( jtaMesgs.getText().length() );
// move insertion point to the end of the text
}
};
SwingUtilities.invokeLater( updateMsgsText );
} // end of showMsg()
// ------------------------------------
public static void main(String args[])
{ new ChatClient(); }
} // end of ChatClient class
/////////////////////////////////////SERVER////////////////////////////////////////////////////////////////////////////////////
import java.net.*;
import java.io.*;
public class ChatServer
{
static final int PORT = 1234; // port for this server
private ChatGroup cg;
public ChatServer()
// wait for a client connection, spawn a thread, repeat
{
cg = new ChatGroup();
try {
ServerSocket serverSock = new ServerSocket(PORT);
Socket clientSock;
while (true) {
System.out.println("Waiting for a client...");
clientSock = serverSock.accept();
new ChatServerHandler(clientSock, cg).start();
}
}
catch(Exception e)
{ System.out.println(e); }
} // end of ChatServer()
// -----------------------------------
public static void main(String args[])
{ new ChatServer(); }
} // end of ChatServer class
