Java APIs

Hi all

I have socket based client server application. And my question is how to read a byte array at client side. Here I'm sending byte array from server and using BufferedReader at client side how to write incoming data to a byte array?

Server code

 public static void main(String args[])
 {
        ServerSocket sock = null;                              // original server socket
        Socket clientSocket = null;                      // socket created by accept
        PrintWriter pw = null;                              // socket output stream
        BufferedReader br = null;  

        try
        {
            sock = new ServerSocket(serverPort);              
            clientSocket = sock.accept();                             
            pw = new PrintWriter(clientSocket.getOutputStream(), true);
            
            pw.println(getImageasByteArray());          // write byte array to socket
          
           // rest oh the code
        }
}

public static byte[] getImageasByteArray()
{
    // implementation
}

client code

public static void main(String args[])
{
        Socket sock = null;                              
        BufferedReader br = null;      
        try
        {
            sock = new Socket(serverIPname, serverPort);
            br = new BufferedReader(new InputStreamReader(sock.getInputStream()));
            
           String answer = br.readLine();  // here how to read the content to byte array
        }
}

So instead of reading the content to string(above case) I need to write whole content to byte array. So I have to create a byte array with the size known. So to do this I need to know the size of the incoming byte array size isn't it?
So can some one please help me.
It's great if u can direct me to implemented example.
Any help highly appreciated

Thank You