Network Java Tutorial

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipOutputStream;
import java.net.Socket;
 
class ZipSocket extends Socket {
    private InputStream in;
    private OutputStream out;
    public ZipSocket() { super(); }
    public ZipSocket(String host, int port) 
        throws IOException {
        super(host, port);
    }
    public InputStream getInputStream() 
        throws IOException {
        if (in == null) {
            in = new ZipInputStream(super.getInputStream());
        }
        return in;
    }
    public OutputStream getOutputStream() 
        throws IOException {
        if (out == null) {
            out = new ZipOutputStream(super.getOutputStream());
        }
        return out;
    }
   
    public synchronized void close() throws IOException {
        OutputStream o = getOutputStream();
        o.flush();
  super.close();
    }
}