I do hope you don't write all your code in one line like that :-)
-----Original Message-----
From: ravi kanth <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED] <[EMAIL PROTECTED]>; [EMAIL PROTECTED]
<[EMAIL PROTECTED]>
Date: Tuesday, March 20, 2001 08:18
Subject: chat program in swing using JApplet
CHAT PROGRAM USING JAPPLET.
My problem is that I have developed a chat program using RMI and Swings by
defining a ClientInterface which will be having setMessage(String s) method
which will be called by server ,and ServerInterface which will be having
three methods login(ClientInterface client,String name),logout(String
str,String name),sendMessage(String name),and server program and a client .
It is working properly when the client is a normal user(frame), But I�d like
to have a Client program if it is Japplet.
My ClientInterface :
import java.io.*; import java.rmi.*; public interface ClientInterface
extends Remote { public void setMessage(String message) throws
RemoteException; }
My ServerInterface :
import java.rmi.*; public interface ServerInterface extends Remote { public
void login(ClientInterface client,String name) throws RemoteException;
public void sendMessage(String str,String name) throws RemoteException;
public void logout(String name) throws RemoteException; }
Server :
import java.rmi.server.*; import java.rmi.*; import java.io.*; import
java.util.*; public class Server extends UnicastRemoteObject implements
ServerInterface { private Hashtable chatters=new Hashtable(); public
Server() throws RemoteException { super(); } public void
login(ClientInterface client,String name)throws RemoteException
chatters.put(name,client); System.out.println(name +" is logged in"); }
public void sendMessage(String message,String name)throws RemoteException
Enumeration part=chatters.keys(); while(part.hasMoreElements()) { String
str=null; try { str=(String)part.nextElement(); ClientInterface
client=(ClientInterface)chatters.get(str); client.setMessage(name+":"+
message); } catch(Exception ex) { System.out.println("Error in sending
message to "+str); chatters.remove(str); } } } public void logout(String
name)throws RemoteException { chatters.remove(name);
System.out.println(name+" : LoggedOut"); } public static void main(String
arh[]) { try { Server server=new Server(); Naming.rebind("Chat",server);
System.out.println("Chat server is ready"); } catch(Exception e)
System.out.println("error"+e); } } }
This is my Client Program using Frames,any enhancements to Japplet are
welcome.
Client :
import java.awt.*; import java.awt.event.*; import java.rmi.server.*; import
javax.swing.*; import java.rmi.*; public class ChatClient extends
javax.swing.JFrame implements ClientInterface { String name; ServerInterface
server; public ChatClient() { try { UnicastRemoteObject.exportObject(this);
server=(ServerInterface)Naming.lookup("rmi://wks10/Chat"); } catch(Exception
e) { System.out.println("problem in login "+e); } setTitle("Client");
setDefaultCloseOperation(javax.swing.JFrame.DO_NOTHING_ON_CLOSE);
getContentPane().setLayout(new BorderLayout(0,0)); JPanel jp2=new JPanel();
jp2.add(new JLabel("Message")); jp2.add(tfText);
getContentPane().add(BorderLayout.NORTH,jp2); jp1.setLayout(new
BorderLayout(0,0)); getContentPane().add(BorderLayout.CENTER,jp1);
jp1.setBounds(0,0,488,274); jsp1.setOpaque(true);
jp1.add(BorderLayout.CENTER,jsp1); jsp1.setBounds(0,0,485,274);
tam.setDisabledTextColor(new java.awt.Color(153,153,153));
jsp1.getViewport().add(tam); tam.setBounds(0,0,485,271);
tam.setEditable(false); tfText.setEditable(false); jp2.setLayout(new
FlowLayout(FlowLayout.CENTER,5,5));
getContentPane().add(BorderLayout.SOUTH,jp2); jp2.setBounds(0,274,488,35);
jb1.setText("LogIn"); jb3.setText("LogOut"); jb1.setActionCommand("LogIn");
jp2.add(jb1); jb1.setBounds(132,5,75,25); jb2.setText("send");
jb2.setEnabled(false); jb3.setEnabled(false); jb2.addActionListener(new
ActionListener() { public void actionPerformed(ActionEvent ae) { try
server.sendMessage(tfText.getText(),name); tfText.setText("");
tfText.requestFocus(); } catch(Exception e)
JOptionPane.showMessageDialog(ChatClient.this,"Error in sending");
System.out.println("Error in sending "+e.getMessage()); } } });
jb3.addActionListener(new ActionListener() { public void
actionPerformed(ActionEvent ae) { try { server.logout(name);
System.exit(0); } catch(Exception e)
JOptionPane.showMessageDialog(ChatClient.this,"Error in logout"); } } });
jb2.setActionCommand("Send"); jp2.add(jb2); jb2.setBounds(212,5,63,25);
jb2.setText("send"); jb3.setActionCommand("LogOut"); jp2.add(jb3);
jb3.setBounds(280,5,75,25); jb1.addActionListener(new ActionListener()
public void actionPerformed(ActionEvent ae) { String
str=JOptionPane.showInputDialog(ChatClient.this,"Enter your Name");
name=str; ChatClient.this.setTitle(name); try
server.login(ChatClient.this,name); jb2.setEnabled(true);
jb3.setEnabled(true); jb1.setEnabled(false); tfText.setEditable(true); }
catch(Exception e) { JOptionPane.showMessageDialog(ChatClient.this,"Error in
login"); System.out.println("Error "+e.getMessage()); } } });
setSize(600,300); setVisible(true); getRootPane().setDefaultButton(jb1);
jb1.requestFocus(); } public static void main(String jk[]) { new
ChatClient(); } javax.swing.JTextField tfText=new JTextField(20);
javax.swing.JPanel jp1=new javax.swing.JPanel(); javax.swing.JScrollPane
jsp1=new javax.swing.JScrollPane(); javax.swing.JTextArea tam=new
javax.swing.JTextArea(); javax.swing.JPanel jp2=new javax.swing.JPanel();
javax.swing.JButton jb1=new javax.swing.JButton(); javax.swing.JButton
jb2=new javax.swing.JButton(); javax.swing.JButton jb3=new
javax.swing.JButton(); public void setMessage(String message)throws
RemoteException { tam.append(message+"\n"); } }
Any suggestions as to how I can write a client program in Japplet are
welcome.
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