Sockets in Java Input and Output

import java.net.*;
import java.io.*;
 
class ....
 
 static String domain;
 static int port;
 static InetAddress addr;
 static BufferedReader in;
 static BufferedWriter out;
 static Socket sock;
 static String line;
 
public ....(String d,int p) {
        domain = d;
        port = p;
        try {
                addr = InetAddress.getByName(domain);
                sock = new Socket(addr,port);
                in = new BufferedReader(new InputStreamReader(sock.getInputStream()));
                out =new BufferedWriter(new OutputStreamWriter(sock.getOutputStream()));
 
                }
            catch(Exception ee)
            {
              JOptionPane.showMessageDialog(null,"Constructor Error: " + ee);
            }
 
        }
 
//Data to Output to the socket
try {
out.write("Data to send");
out.flush();
}
catch(Exception ee)
{}
 
//read data from socket
 
try {
while((line = in.readline()) != null) 
{
System.out.println(line);
}
}catch(Exception e)
{}