| Authenticator | An implementation of this class is able to obtain authentication information
for a connection in several ways. |
| CacheRequest | CacheRequest is a kind of channel for storing resource data in the
ResponseCache. |
| CacheResponse | A response cache entry. |
| ContentHandler | This class converts the content of a certain format (i.e. |
| CookieHandler | This class provides a way to manage cookies with a HTTP protocol handler. |
| CookieManager | This class provides a concrete implementation of CookieHandler. |
| DatagramPacket | This class represents a datagram packet which contains data either to be sent
or received through a DatagramSocket. |
| DatagramSocket | This class implements a UDP socket for sending and receiving DatagramPacket. |
| DatagramSocketImpl | The abstract superclass for datagram and multicast socket implementations. |
| HttpCookie | An opaque key-value value pair held by an HTTP client to permit a stateful
session with an HTTP server. |
| HttpURLConnection | An URLConnection for HTTP (RFC 2616) used to send and
receive data over the web. |
| IDN | Converts internationalized domain names between Unicode and the ASCII Compatible Encoding
(ACE) representation. |
| Inet4Address | An IPv4 address. |
| Inet6Address | An IPv6 address. |
| InetAddress | An Internet Protocol (IP) address. |
| InetSocketAddress | This class represents a socket endpoint described by a IP address and a port
number. |
| InterfaceAddress | Identifies one of a network interface's addresses. |
| JarURLConnection | This class establishes a connection to a jar: URL using the JAR protocol. |
| MulticastSocket | This class implements a multicast socket for sending and receiving IP
multicast datagram packets. |
| NetPermission | This class represents permissions to configure the access to network
resources. |
| NetworkInterface | This class is used to represent a network interface of the local device. |
| PasswordAuthentication | This immutable class is a data structure that encapsulates username and
password which is used by the Authenticator class. |
| Proxy | This class represents proxy server settings. |
| ProxySelector | Selects an applicable proxy server when connecting to a resource specified by
a URL. |
| ResponseCache | Caches URLConnection responses. |
| SecureCacheResponse | A secure cache response represents data which is originally retrieved over a
secure connection. |
| ServerSocket | This class represents a server-side socket that waits for incoming client
connections. |
| Socket | Provides a client-side TCP socket. |
| SocketAddress | This abstract class represents a protocol-independent base for
socket-endpoint representing classes. |
| SocketImpl | This class is the base of all streaming socket implementation classes. |
| SocketPermission | Regulates the access to network operations available through sockets through
permissions. |
| URI | This class represents an instance of a URI as defined by RFC 2396. |
| URL | A URL instance specifies the location of a resource on the internet as
specified by RFC 1738. |
| URLClassLoader | This class loader is responsible for loading classes and resources from a
list of URLs which can refer to either directories or JAR files. |
| URLConnection | A connection to a URL for reading or writing. |
| URLDecoder | This class is used to decode a string which is encoded in the application/x-www-form-urlencoded MIME content type. |
| URLEncoder | This class is used to encode a string using the format required by
application/x-www-form-urlencoded MIME content type. |
| URLStreamHandler | The abstract class URLStreamHandler is the base for all classes which
can handle the communication with a URL object over a particular protocol
type. |