java.net

インタフェース  ContentHandlerFactory DatagramSocketImplFactory FileNameMap SocketImplFactory SocketOptions URLStreamHandlerFactory

クラス  Authenticator ContentHandler DatagramPacket DatagramSocket DatagramSocketImpl HttpURLConnection InetAddress JarURLConnection MulticastSocket NetPermission PasswordAuthentication ServerSocket Socket SocketImpl SocketPermission URL URLClassLoader URLConnection URLDecoder URLEncoder URLStreamHandler

例外  BindException ConnectException MalformedURLException NoRouteToHostException ProtocolException SocketException UnknownHostException UnknownServiceException