Lock up problem in a simple chat app

Question

Hello,
I have a problem with my application locking up. I know that's a
very general problem but let me elaborate.
I have a standard cllient server setup with server part having
3 functions: login,logout and say. When i start my first client
everything is just fine (as long as the client is alone).Pretty much
as soon as i start another client (on another machine) i start having
problems. The clients can exchange about 2-3 lines and then they both
lock up.
Below is the line from the server:
user.receiveChat("server","you were logged in successfully!",Color.red);
user class is a subclass of UnicastRemoteObject and it implements
a subclass of remote interface. Its the same story for the server.
Both of the above objects are fields in 2 other Classes (MessageServer
and MessageClient respectively).
The above line results in the user object executing
the following function on its client object:
<code>
public void receiveChat(String name, String message,Color c) throws java.rmi.RemoteException
synchronized(client)
client.receiveChat(name,message,c);
Thread.currentThread().yield();
</code>
then the client executes this :
public void receiveChat(String name,String message,Color c)
synchronized(doc)
try
// System.out.println(message);
StyleConstants.setForeground(attributes, c);
StyleConstants.setBold(attributes,true);
doc.insertString(doc.getLength(),name+": ",attributes);
StyleConstants.setBold(attributes,false);
doc.insertString(doc.getLength(),message+"\n", attributes);
catch(BadLocationException e)
System.out.println(e.toString());
pane.getVerticalScrollBar().setValue(pane.getVerticalScrollBar().getMaximum()+10);
Thread.currentThread().yield();
And that's that.
It seems like this started happening when i replaced my plain old
textarea with the JTextPane for the color support.
Any ideas or suggestions are welcome.
thanks!

Answer 1

as a follow up:
i took out JTextPane and put JTextArea back in and it works like a charm. Anyone have any idea how i could get my colored lines without the
lock ups??