public DefaultSocketFactory() 
{
                      
      this(null, 200);
}

Create a socket factory that binds on any address with a default backlog of 200

 public DefaultSocketFactory(InetAddress bindAddress) 
{
      this(bindAddress, 200);
}

Create a socket factory with the given bind address

 public DefaultSocketFactory(int backlog) 
{
      this(null, backlog);
}

Create a socket factory with the given backlog

 public DefaultSocketFactory(InetAddress bindAddress,
    int backlog) 
{
      this.bindAddress = bindAddress;
      this.backlog = backlog;
}

Create a socket factory with the given bind address and backlog

 public ServerSocket createServerSocket(int port) throws IOException 
{
        ServerSocket activeSocket = new ServerSocket(port, backlog, bindAddress);
        return activeSocket;
}

Create a server socket on the specified port (port 0 indicates an anonymous port).

 public boolean equals(Object obj) 
{
        return obj instanceof DefaultSocketFactory;
}

 public String getBindAddress() 
{
      String address = null;
      if( bindAddress != null )
         address = bindAddress.getHostAddress();
      return address;
}

 public int hashCode() 
{
        return getClass().getName().hashCode();
}

 public  void setBindAddress(String host) throws UnknownHostException 
{
      bindAddress = InetAddress.getByName(host);
}