Can you tell me what is the error in this code?

        Socket socket = new Socket(hostname, port);
        PrintWriter out = new PrintWriter(socket.getOutputStream(), true);
        //DataInputStream is = new DataInputStream(socket.getInputStream());
        out.println("hi");

        System.out.print(in.readLine());

The Server Socket program is written in .Net and it echoes back the data. The data is sent successfully but could not be retrieved properly. I tried the same by using the linux command

nc 192.168.1.6 8425 (enter)
Hi (Sent data)
Hi (recieved data)

When I checked the code the data is found to have sent as byteStream in .Net. Is that a problem. In that case what modification should I make.