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UDP (User Datagram Protocol) 2nd
     connections, managing
     DatagramChannel class
     DatagramPacket class
     datagrams, sending and receiving
     DatagramSocket class
     discard server
     file transfer protocols using
     Java classes implementing
     multicasting and 2nd
     multicasting, compared to
     packet size
     ports per host
     simple clients
     TCP channels versus datagram channels
     TCP, compared to
     Traffic class
     UDP echo client
     UDPServer class
UDP datagrams and sockets
    code examples
         DatagramPacket, constructing for receipt of data
         high-performance UDP discard server
         local UDP port scanning
         ReceiverThread class
         SenderThread class
         UDP daytime server
         UDP discard client
         UDP discard server
         UDP echo client based on channels
         UDP echo server
         UDP time client
         UDPDiscardServer
         UDPDiscardServer based on channels
         UDPEchoClient class
         UDPEchoServer based on channels
         UDPPoke class
         UDPServer class
UDPDiscardClient class
UDPEchoClient class
UDPPoke class
     private fields
UDPServer class
     fields
unbind( ) methods
     Naming class
     Registry interface
unicast sockets
UnicastRemoteObject class 2nd
uniform resource names (URNs)
unread( ) methods (PushbackInputStream class)
URI class
     constructing URIs
     getPort( ) method
     getter methods
     isAbsolute( ) method
     isOpaque( ) method
     parseServerAuthority( ) method
     resolving relative URIs
         relativize( ) method
         resolve( ) method
         resolveURI( ) method
     URL class, compared to 2nd
     utility methods
         compareTo( ) method
         equals( )method
         hashCode( ) method
         toASCIIString( ) method
         toString( ) method
URIs (Uniform Resource Identifiers)
     absolute and relative URIs
     hierarchical and non-hierarchical URIs
     parts
     schemes
URL class
     character encoding and
     constructing relative URLs
     constructing URLs from strings
     constructing URLs from thier parts
     constructors
     creating new URLs
     GET method
         server-side input processing
     HTTP authentication
     inaccessible but supported protocols
     methods for protocol handlers
     object methods
         equals( )
         hashCode( ) method
         toString( ) method
     protocol handlers, usage in
     retrieving data
         getContent( ) method
         openConnection( ) method
         openStream( ) method
         overloaded getContent( ) method
     server-side programs, communicating with
         reverse engineering
         server-side input processing
     splitting URLs into pieces
         getAuthority( ) method
         getDefaultPort( ) method
         getFile( ) method
         getHost( ) method
         getPath( ) method
         getPort( ) method
         getProtocol( ) method
         getQuery( ) method
         getRef( ) method
         getUserInfor( ) method
     supported protocols
     URI class, compared to
     URLConnection class, compared to
     URLStreamHandler objects
     utility methods
         sameFile( ) method
         toExternalForm( ) method
         toURI method
URLConnection class 2nd
     API
     caching
     client request HTTP headers, configuring
    code examples
         CacheRequest class
         CacheResponse class
         CacheResponse subclass
         downloading and saving binaries from web sites
         get time of URL's last change
         in-memory ResponseCache
         posting a form
         printing URL of URLConnection to www.oracle.com
         returning headers
         set ifModifiedSince to 24 hours ago
         SourceViewer with response code and message
         web pages, downloading with correct character sets
     connections, configuring
         allowUserInteraction instance field
         connected instance field
         doinput instance field
         doOutput instance field
         getter and setter methods
         ifModifiedSince instance field
         POST method versus GET for long URLs
         protected instance fields
         timeouts
         url instance field
         useCaches instance field
     constructor
     content handlers
         ContentHandlerFactory
         getContent( ) methods
     getContentEncoding( ) method
     getContentLength( ) method
     getContentType( ) method
     getDate( ) method
     getExpiration( ) method
     getHeaderField( ) method
     getInputStream( ) method
     getLastModified( ) method
     headers, reading
     HTTP dependency
     HttpURLConnection subclass [See HttpURLConnection subclass]
     JarURLConnection class
     MIME content types, guessing
     object methods
     opening connections
         header querying methods
         reading headers
         retrieving arbitrary header fields
         servers, reading data from
     protocol handlers, usage in
     security
     servers, writing data to
         POST versus GET
         post( ) method
     URL class, compared to
URLConnection object
URLDecoder class
URLEncoder class
     encode( ) method
         Java 1.3 versus Java 1.4 versions
URLName class
     constructors
     parsing methods
URLs (Uniform Resource Locators)
     character encodinging
     distributed computing technologies
     EJB
     piece-by-piece encoding
     relaitve URLs
     relative
     schemes
         IANA list
     structure
     this tutorial
URLs and URIs
    code examples
         A URL relative to the web page
         comparing http://www.oracle.com/ and http://www.ora.com/
         download a web page
         downloading password-protected web pages
         GUI authenticator
         Open Directory searches
         parts of a URI
         parts of a URL
         protocol tester
         ProxySelectors that remember connections
         QueryString class
         -x-www-form-urlencoded strings
URLStreamHandler and URLStreamHandlerFactory
URLStreamHandler class
     connecting method
     constructor
     new protocols and
     protecting hash code
     protocol handlers, usage in
     proxy server specification
     URL parsing methods
URLStreamHandlerFactory interface
     protocol handlers, usage in
URNs (Uniform Resource Names)
Usenet news and JavaMail API
usernames

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