C# and Java Sockets how to comunicate

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C#

Java

C#4.0

sockets

Hello,

I have C# server implemented with sockets in this way:
I have a listener:

TcpListener listener = new TcpListener(IPAddress.Any, 33333);
listener.Start();

I created a new client every time a client connects

TcpClient client = listener.AcceptTcpClient();

And a BinaryReader and BinaryWriter:

NetworkStream stream = client.GetStream();
w = new BinaryWriter(stream);
r = new BinaryReader(stream);

If I want to write or read something to connected client i am using:

w.Write(MESSAGE);//for writing
msg=r.ReadString();//for reading something that client sends

The problem:
How can I create a java program to comunicate with this server, I only managed to connect to the server(create the socket) but i didn't find anything on google about how to send and receive messages, I tried different ways but it didn't write or read anything. Any suggestions? or a very simple java program would be just enough. Thanks

Regards,
Sas Gabriel