java.net
Interfaces 
ContentHandlerFactory
DatagramSocketImplFactory
FileNameMap
InetAddressImpl
SocketImplFactory
SocketOptions
SocksConsts
URLStreamHandlerFactory
Classes 
Authenticator
ContentHandler
DatagramPacket
DatagramSocket
DatagramSocketImpl
FactoryURLClassLoader
HttpURLConnection
Inet4Address
Inet4AddressImpl
Inet6Address
Inet6AddressImpl
InetAddress
InetAddressContainer
InetAddressImplFactory
InetSocketAddress
JarURLConnection
MulticastSocket
NetPermission
NetworkInterface
Parts
PasswordAuthentication
PlainDatagramSocketImpl
PlainSocketImpl
ServerSocket
Socket
SocketAddress
SocketImpl
SocketInputStream
SocketOutputStream
SocketPermission
SocketPermissionCollection
SocksSocketImpl
SocksSocketImplFactory
UnknownContentHandler
URI
URL
URLClassLoader
URLConnection
URLDecoder
URLEncoder
URLStreamHandler
Exceptions 
BindException
ConnectException
MalformedURLException
NoRouteToHostException
PortUnreachableException
ProtocolException
SocketException
SocketTimeoutException
UnknownHostException
UnknownServiceException
URISyntaxException