Java creates chat rooms (servers and clients)

Java creates a chat room (client)

/* Client connection (myclient. Java )*/
Package itbaby. jchat;
Import java.net .*;
Import java. Io .*;
Import java. AWT .*;
Import javax. Swing .*;

Public class myclient extends thread
{
Static socket server;
Textarea jtextarea1;
List list1;
Printwriter out;
Outputstream outs;
String susername;
String sipaddr;

Public myclient (textarea _ jtextarea1, LIST _ list1, string _ susername, string SIP)
{
This. jtextarea1 = _ jtextarea1;
This. list1 = _ list1;
This. susername = _ susername;
This. sipaddr = sip;
}

Public void sendmessage (string smessage) // send a public chat message
{
Out. println ("[" + this. susername + "]:" + smessage );
Out. Flush ();
}

Public void sendmessageprivate (string privateuser, string smessage) // send a private chat message
{
Out. println ("sendto:" + privateuser + "[" + this. susername + "]:" + smessage );
Out. Flush ();
}

Public void sendwelcome () // send a welcome message to the server, which is a message that is sent by the server.
{
Out. println ("cmd: Welcome" + susername );
Out. Flush ();
}

Public void run ()
{
Try
{
Myclient. Server = new socket (this. sipaddr, 2005 );
Outs = server. getoutputstream ();
Out = new printwriter (outs );

Myclientthread myct = new myclientthread (this. jtextarea1, this. list1 );
Myct. Start ();

This. sendwelcome ();

// Bufferedreader Wt = new bufferedreader (New inputstreamreader (system. In ));
/* While (true) // console-based test Client
{
String STR = wt. Readline ();
Out. println (STR );
Out. Flush ();
If (Str. Equals ("end "))
Break;
}
Out. Close ();
Server. Close ();*/
}
Catch (exception ex)
{
String exmsg = ex. getmessage ();
System. Out. println (exmsg );
}

}

Public static void main (string [] ARGs) throws exception
{

}

}

 

 

/* Client thread handler (myclientthread. Java )*/
Package itbaby. jchat;
Import java. Io .*;
Import java.net .*;
Import javax. Swing .*;
Import java. util .*;
Import java. Lang .*;
Import java. AWT .*;

Public class myclientthread extends thread
{
Textarea jtextarea1;
Java. AWT. List list1;
Public myclientthread (textarea _ jtextarea1, java. AWT. LIST _ list1)
{
This. jtextarea1 = _ jtextarea1;
This. list1 = _ list1;
}

Public void run ()
{

While (true)
{
Try
{
Bufferedreader in = new bufferedreader (New inputstreamreader (myclient. server. getinputstream ()));
String smsg = in. Readline ();
If (smsg. indexof ("cmd: userlist ")! =-1)
{
// User list
Smsg = smsg. substring (12, smsg. Length ());
This. list1.removeall ();
String susr = "";
For (INT I = 0; I <smsg. Length (); I ++)
{

If (smsg. charat (I) = '|') // user names are separated by |
{
This. list1.add (susr );
Susr = "";
}
Else
Susr = susr + String. valueof (smsg. charat (I ));
}

}
Else
This. jtextarea1.append (smsg + '/N'); // chat Information
}
Catch (exception ex)
{
String exmsg = ex. getmessage ();
System. Out. println (exmsg );
}
}
}

}

 

/* Briefly describe the Client GUI program, saving the GUI */

 

// After the system is loaded, click the login button to initialize the client connection.
Myclient mclient; // global class

 

// Textarea1 Message Display
// List1 user list
// Jtextfield1 message input area
// Jtextfield4 File Transfer Path Name
Mclient = new myclient (textarea1, list1, jtextfield1.gettext (), jtextfield4.gettext ());
Mclient. Start ();

// There Is A send button. When you click it, run the following code:
If (jtextfield2.gettext (). Length () = 0) return;
If (checkbox1.getstate () // Private Chat Information
{
If (jlabel4.gettext (). Length ()! = 0)
Mclient. sendmessageprivate (jlabel4.gettext (),
This. jtextfield2.gettext ());
}
Else // public chat
Mclient. sendmessage (jtextfield2.gettext ());

Jtextfield2.settext ("");

 

Java creates a chat room (server)

 

/* Server Master Program (myserver. Java )*/
Package itbaby. jchat;

Import java. Io. bufferedreader;
Import java. Io. ioexception;
Import java. Io. inputstreamreader;
Import java. Io. printwriter;
Import java.net. serversocket;
Import java.net. Socket;
Import java. util. arraylist;

Public class myserver
{
Static arraylist clients = new arraylist ();
Static arraylist onlineuser = new arraylist ();
Static arraylist onlineip = new arraylist ();
Public myserver ()
{
}

Public static void cleanuplistenlist ()
{
/*
Check the number of current online users, called in the thread
*/
For (INT I = clients. Size ()-1; I>-1; I --){
Myserverthread client = (myserverthread) clients. Get (I );
If (! Client. isalive ())
{
String sbye = "goodbye" + (string) onlineuser. Get (I );
Client. Kill ();
Clients. Remove (I); // remove a disconnected thread
Onlineuser. Remove (I );
Onlineip. Remove (I );
Myserverthread. sendtoalluser (); // update an online user
Myserverthread. sendtoall (sbye); // display the goodbye message
System. Out. println ("disconnected ...");
}
}

}

Public static void main (string argv []) throws ioexception
{
Serversocket listener = new serversocket (2005 );
Bufferedreader in = new bufferedreader (New inputstreamreader (system. In ));
Printwriter out = new printwriter (system. Out, true );

System. Out. println ("running ...");
System. Out. println ("port: 2005 ");
Myuserrefresh myuref = new myuserrefresh ();
Myuref. Start ();

While (true)
{
Socket Client = listener. Accept (); // wait for the client to connect
Myserverthread myclientthread = new myserverthread (client); // a connection is established to start executing a thread.
Myclientthread. Start ();
Myserver. Clients. Add (myclientthread); // record valid threads
Myserver. cleanuplistenlist ();
}

}

}

 

 

/* Chat thread handler (myserverthread. Java )*/
Package itbaby. jchat;
Import java. Io. bufferedreader;
Import java. Io. ioexception;
Import java. Io. inputstream;
Import java. Io. inputstreamreader;
Import java. Io. outputstream;
Import java. Io. printwriter;
Import java.net. Socket;
Import java. util .*;

Public class myserverthread extends thread
{
Private Socket Client;
Boolean stillrunning = true;
Public printwriter pout;

Public myserverthread (socket _ client)
{
Client = _ client;
}

Public void kill ()
{
Stillrunning = false;
}

Public static void sendtoall (string smsg) // public chat
{
For (INT I = 0; I <myserver. Clients. Size (); I ++)
{
Myserverthread th = (myserverthread) myserver. Clients. Get (I );
Th. Pout. println (smsg + "(" + Th. gettime () + ")");
}
}

Public void sendtoprivate (string sprivateuser, string smsg) // Private Chat
{
For (INT I = 0; I <myserver. Clients. Size (); I ++)
{
String sip = (string) myserver. onlineip. Get (I );
String sus = (string) myserver. onlineuser. Get (I );
String suser = sus + "(" + sip + ")";
If (sprivateuser. Trim (). Equals (suser. Trim ()))
{
Myserverthread th = (myserverthread) myserver. Clients. Get (I );
Th. Pout. println ("privatemessage:" + smsg + "(" + Th. gettime () + ")");
Break;
}
}

}

Public static void sendtoalluser () // all online user list data
{
String suser = "";
Int icount = myserver. Clients. Size ();
For (INT I = 0; I <icount; I ++)
{
String sip = (string) myserver. onlineip. Get (I );
String sus = (string) myserver. onlineuser. Get (I );
Suser = suser + sus + "(" + sip + ") | ";
}

For (INT I = 0; I <icount; I ++)
{
Myserverthread th = (myserverthread) myserver. Clients. Get (I );
Th. Pout. println ("cmd: userlist" + suser );
}

}

 

Public String gettime ()
{
// String stime = "";
Java. Text. dateformat format1 = new java. Text. simpledateformat ("HH: mm: SS ");
Java. util. Date currenttime_2 = new java. util. Date ();
String stime = format1.format (currenttime_2 );

Return stime;
}

Public String getclientip ()
{
Return (client. getinetaddress (). tostring ();
}

Public void run ()
{
Try
{
// (Client. getinetaddress (). tostring ());
Inputstream in = client. getinputstream ();
Inputstreamreader textin = new inputstreamreader (in );
Bufferedreader textlinein = new bufferedreader (textin );
Outputstream out = client. getoutputstream ();
Pout = new printwriter (Out, true );

While (stillrunning)
{

String sometext = textlinein. Readline ();
If (sometext. Length ()! = 0)
{
If (sometext. indexof ("cmd: Welcome ")! =-1)
{// Welcome Message
String suser = sometext. substring (11, sometext. Length ());
This. sendtoall ("welcome" + suser + "from" + this. getclientip ());

Myserver. onlineip. Add (this. getclientip ());
Myserver. onlineuser. Add (suser );

// Send User List Data
Myserverthread. sendtoalluser ();
}
Else if (sometext. indexof ("sendto :")! =-1)
{// Private Chat
String suser = sometext. substring (7, sometext. indexof (")") + 1 );
Sometext = sometext. substring (sometext. indexof (")") + 1,
Sometext. Length ());
Pout. println ("privatemessage:" + sometext + "(" + this. gettime () + ")"); // self-sent, self-echo chat statement
This. sendtoprivate (suser, sometext); // recipient, displaying chat statements
}
Else myserverthread. sendtoall (sometext); // send public chat messages

}
}

}
Catch (ioexception E)
{
System. Out. println ("I/O error they probably left" + E );
}

}

}

 

 

/* Refresh the user */
Package itbaby. jchat;

Public class myuserrefresh extends thread
{
Public myuserrefresh (){
}

Public void run ()
{
While (true)
{
Myserver. cleanuplistenlist ();
}
}
}