The next module will discuss how to work with the java.net package. That will enable you to write programs that access resources over the internet and establish connections between machines.
When you combine what you will learn in the next module with what you have already learned in this module, you will find that you can work with both the java.io and java.net classes and methods to read and write to sockets.
This will enable you to write client/server applications that work over the Internet.
| Authenticator |
The class Authenticator represents an object that knows how to obtain authentication for a network connection.
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| CacheRequest |
Represents channels for storing resources in the ResponseCache.
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| CacheResponse |
Represent channels for retrieving resources from the ResponseCache.
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| ContentHandler |
The abstract class ContentHandler is the superclass of all classes that read an Object from a URLConnection. |
| CookieHandler |
A CookieHandler object provides a callback mechanism to hook up a HTTP state management policy implementation into the HTTP protocol handler. |
| CookieManager |
CookieManager provides a concrete implementation of CookieHandler, which separates the storage of cookies from the policy surrounding accepting and rejecting cookies. |
| DatagramPacket |
This class represents a datagram packet. |
| DatagramSocket |
This class represents a socket for sending and receiving datagram packets. |
| DatagramSocketImpl |
Abstract datagram and multicast socket implementation base class. |
| HttpCookie |
An HttpCookie object represents an http cookie, which carries state information between server and user agent. |
| HttpURLConnection |
A URLConnection with support for HTTP-specific features. |
| IDN |
Provides methods to convert internationalized domain names (IDNs) between a normal Unicode representation and an ASCII Compatible Encoding (ACE) representation. |
| net4Address |
This class represents an Internet Protocol version 4 (IPv4) address. |
| Inet6Address |
This class represents an Internet Protocol version 6 (IPv6) address. |
| InetAddress |
This class represents an Internet Protocol (IP) address. |
| InetSocketAddress |
This class implements an IP Socket Address (IP address + port number)
It can also be a pair (hostname + port number), in which case an attempt will be made to resolve the hostname. |
| InterfaceAddress |
This class represents a Network Interface address. |
| JarURLConnection |
A URL Connection to a Java ARchive (JAR) file or an entry in a JAR file. |
| MulticastSocket |
The multicast datagram socket class is useful for sending and receiving IP multicast packets. |
| NetPermission |
This class is for various network permissions. |
| NetworkInterface |
This class represents a Network Interface made up of a name, and a list of IP addresses assigned to this interface. |
| PasswordAuthentication |
The class PasswordAuthentication is a data holder that is used by Authenticator. |
| Proxy |
This class represents a proxy setting, typically a type (http, socks) and a socket address. |
| ProxySelector |
Selects the proxy server to use, if any, when connecting to the network resource referenced by a URL. |
| ResponseCache |
Represents implementations of URLConnection caches. |
| SecureCacheResponse |
Represents a cache response originally retrieved through secure means, such as TLS. |
| ServerSocket |
This class implements server sockets. |
| Socket |
This class implements client sockets (also called just "sockets"). |
| SocketAddress |
This class represents a Socket Address with no protocol attachment. |
| SocketImpl |
The abstract class SocketImpl is a common superclass of all classes that actually implement sockets. |
| SocketPermission |
This class represents access to a network via sockets. |
| StandardSocketOptions |
Defines the standard socket options. |
| URI |
Represents a Uniform Resource Identifier (URI) reference. |
| URL |
Class URL represents a Uniform Resource Locator, a pointer to a "resource" on the World Wide Web. |
| URLClassLoader |
This class loader is used to load classes and resources from a search path of URLs referring to both JAR files and directories. |
| URLConnection |
The abstract class URLConnection is the superclass of all classes that represent a communications link between the application and a URL. |
| URLDecoder |
Utility class for HTML form decoding. |
| URLEncoder |
Utility class for HTML form encoding. |
| URLStreamHandler |
The abstract class URLStreamHandler is the common superclass for all stream protocol handlers. |
| Exception |
Description |
| BindException |
Signals that an error occurred while attempting to bind a socket to a local address and port. |
| ConnectException |
Signals that an error occurred while attempting to connect a socket to a remote address and port. |
| HttpRetryException |
Thrown to indicate that a HTTP request needs to be retried but cannot be retried automatically, due to streaming mode being enabled. |
| MalformedURLException |
Thrown to indicate that a malformed URL has occurred. |
| NoRouteToHostException |
Signals that an error occurred while attempting to connect a
socket to a remote address and port.
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| PortUnreachableException |
Signals that an ICMP Port Unreachable message has been received on a connected datagram. |
| ProtocolException |
Thrown to indicate that there is an error in the underlying protocol, such as a TCP error. |
| SocketException |
Thrown to indicate that there is an error creating or accessing a Socket. |
| SocketTimeoutException |
Signals that a timeout has occurred on a socket read or accept. |
| UnknownHostException |
Thrown to indicate that the IP address of a host could not be determined. |
| UnknownServiceException |
Thrown to indicate that an unknown service exception has occurred. |
| URISyntaxException |
Checked exception thrown to indicate that a string could not be parsed as a URI reference. |