Java — page 10 of 10

Java terms

901. UDP (User Datagram Protocol) A connectionless protocol within TCP/IP that corresponds to the transport layer in the International Standard Organization's Open System Interconnect…
902. UMTS (Universal Mobile Telecommunications Service) Developed by Nortel Networks, Universal Mobile Telecommunications Service (UMTS) is a standard that will provide cellular users a consistent set of…
903. unary operator An operator taking a single operand. Java's unary operators are -, +, !, !, ++ and --.
904. unbounded repetition Repetition where the statements within a loop's body are performed an arbitrary number of times, according to the effects of the statements within the…
905. unchecked exception An exception for which it is not required to provide a local try statement, or to propagate via a throws clause defined in the method header.
906. Unicode A 16-bit character set designed to make it easier to exchange and display information that makes use of a wide range of different languages and symbols.
907. uninitialized variable A local variable that been declared, but has had no value assigned to it. The compiler will warn of variables which are used before being initialized.
908. Universal Description, Discovery and Integration (UDDI) project An industry initiative to create a platform-independent, open framework for describing services, discovering businesses, and integrating business services…
909. Universal Standard Products and Services Classification (UNSPSC) A schema that classifies and identifies commodities. It is used in sell-side and buy-side catalogs and as a standardized account code in analyzing…
910. unnamed package All classes defined in files without a package declaration are placed in the unnamed package.
911. unparsed entity A general entity that contains something other than XML. By its nature, an unparsed entity contains binary data.
912. upcast A cast towards an object's ultimate super type - that is, `up' the inheritance hierarchy towards the Object class, for instance // Upcast from…
913. URI A character string used to identify a resource (such as a file) from anywhere on the Internet by type and location.
914. URL Uniform Resource Locator (internet protocol term).
915. URL (Uniform Resource Locator) The Internet address for a document, file, or other resource. It describes the protocol required to access the resource, the host where it can be found…
916. URL path The part of a URL passed by an HTTP request to invoke a servlet. A URL path consists of the context path + servlet path + path info, where
917. URN Uniform resource name. A unique identifier that identifies an entity but doesn't tell where it is located.
918. user (security) An individual (or application program) identity that has been authenticated. A user can have a set of roles associated with that identity, which entitles…
919. user data constraint Indicates how data between a client and a Web container should be protected. The protection can be the prevention of tampering with the data or prevention…
920. UTF Universal Character Set (UCS) Transformation Format. A format for representing multibyte characters that is compatible with programs and file systems that…
921. Valid Sound and justified; meeting the test of patentability.
922. validating parser A parser that ensures that an XML document is valid in addition to being well formed. See also parser.
923. value-binding expression A JavaServer Faces EL expression that refers to a property of a backing bean. A component tag uses this expression to bind the associated component's…
924. variable An item of data named by an identifier. Each variable has a type, such as int or Object, and a scope.
925. variable declaration The association of a variable with a particular type. It is important to make a distinction between the declaration of variables of primitive types and…
926. virtual desktop The name used to describe a user's graphical working area within a window manager.
927. virtual host Multiple hosts plus domain names mapped to a single IP address.
928. virtual machine See Java Virtual Machine (JVM).
929. virtual memory A computer will have a limited amount of real memory available to it. Programs often require more memory than the amount of real memory.
930. VLR (Visitor Location Register) The Visitor Location Register (VLR) is a database that contains temporary information about subscribers.
931. Void Invalid; a void agreement is one for which there is no remedy.
932. volatile A solid or liquid material that easily vaporizes.
933. W-CDMA (Wideband Code-Division Multiple Access) Wideband Code-Division Multiple Access (W-CDMA), also known as IMT-2000, is a 3rd generation wireless technology.
934. W3C World Wide Web Consortium.
935. WAE (Wireless Application Environment) The Wireless Application Environment (WAE) provides a application framework for small devices. WAE leverages other technologies such as WAP, WTP, and WSP.
936. WAP (Wireless Application Protocol) An open, global specification that enables wireless devices to access and interact with information and services. [Exchange 2003]
937. WAP Gateway A WAP Gateway acts as a bridge allowing WAP devices to communicate with other networks (namely the Internet).
938. WAR file Web application archive file. A JAR archive that contains a Web module.
939. Warning The fourth of five Early Warning System components consisting of the processes (including the media) and equipment necessary to make the public aware of…
940. WDP (Wireless Datagram Protocol) Wireless Datagram Protocol (WDP) works as the transport layer of WAP. WDP processes datagrams from upper layers to formats required by different physical…
941. Web application An application written for the Internet, including those built with Java technologies such as JavaServer Pages and servlets, as well as those built with…
942. Web application, distributable A Web application that uses J2EE technology written so that it can be deployed in a Web container distributed across multiple Java virtual machines…
943. Web component A component that provides services in response to requests; either a servlet or a JSP page.
944. Web container A container that implements the Web component contract of the J2EE architecture.
945. Web container provider A vendor that supplies a Web container.
946. Web container, distributed A Web container that can run a Web application that is tagged as distributable and that executes across multiple Java virtual machines running on the same…
947. Web module A deployable unit that consists of one or more Web components, other resources, and a Web application deployment descriptor contained in a hierarchy of…
948. Web resource A static or dynamic object contained in a Web application that can be referenced by a URL.
949. Web resource collection A list of URL patterns and HTTP methods that describe a set of Web resources to be protected.
950. Web server A computer that hosts Web pages and responds to requests from browsers. Also known as an HTTP server, a Web server stores files whose URLs begin with…
951. Web server provider A vendor that supplies a Web server.
952. Web Service A Web service is a software system designed to support interoperable machine-to-machine interaction over a network.
953. well-formed An XML document that is syntactically correct. It does not have any angle brackets that are not part of tags, all tags have an ending tag or are…
954. well-known port A port number at which a server offers a familiar service. For instance, 80 is the well-known port number for servers using the HyperText Transfer…
955. while A Java keyword used to declare a loop that iterates a block of statements. The loop's exit condition is specified as part of the while statement.
956. while loop One of Java's three control structures used for looping. The other two are the do loop and for loop.
957. white space Characters used to create visual spacing within a program. White spaces include space, tab, carriage return and line feed characters.
958. window manager A window manager provides a computer user with a virtual desktop containing one or more windows and working areas in which individual programs may be run.
959. WMA (Wireless Messaging API) The Wireless Messaging API (WMA) is a set of classes for sending and receiving Short Message Service messages. See also SMS.
960. WML (Wireless Markup Language) The Wireless Markup Language (WML) is a simple language used to create applications for small wireless devices like mobile phones.
961. WMLScript WMLScript is a subset of the JavaScript scripting language designed as part of the WAP standard to provide a convenient mechanism to access mobile phone's…
962. world readable files Files on a file system that can be viewed (read) by any user. For example: files residing on Web servers can only be viewed by Internet users if their…
963. wrapper An object that encapsulates and delegates to another object to alter its interface or behavior in some way.
964. wrapper classes Java's primitive types are not object types. The wrapper classes are defined in the java.lang package.
965. Writer class A sub class of the Writer abstract, defined in the java.io package. Writer classes translate output from Unicode to a host-dependent character set…
966. WSP (Wireless Session Protocol) Wireless Session Protocol (WSP) implements session services of WAP. Sessions can be connection-oriented and connectionless and they may be suspended and…
967. WTLS (Wireless Transport Layer Security) Wireless Transport Layer Security protocal (WTLS) does all cryptography oriented features of WAP.
968. WTP (Wireless Transaction Protocol) Wireless Transaction Protocol (WTP) is WAP's transaction protocol that works between the session protocol WSP and security protocol WTLS.
969. WWW World Wide Web. The WWW is made up of all of the computers on the Internet which use HTML-capable software (Netscape, Explorer, etc.) to exchange data.
970. Xalan XSLT stylesheet processor. For more information, see http://xml.apache.org/xalan-j/
971. XHTML An XML look-alike for HTML defined by one of several XHTML DTDs. To use XHTML for everything would of course defeat the purpose of XML, because the idea…
972. XLink The part of the XLL specification that is concerned with specifying links between documents.
973. XLL The XML Link Language specification, consisting of XLink and XPointer.
974. XML See Extensible Markup Language.
975. XML registry See registry.
976. XML Schema The W3C specification for defining the structure, content, and semantics of XML documents.
977. XPath An addressing mechanism for identifying the parts of an XML document.
978. XPointer The part of the XLL specification that is concerned with identifying sections of documents so that they can be referenced in links or included in other…
979. XSL Extensible Stylesheet Language. A standard that lets you do the following:
980. XSL-FO A subcomponent of XSL used for describing font sizes, page layouts, and how information flows from one page to another.
981. XSLT XSL Transformations. An XML document that controls the transformation of an XML document into another XML document or HTML.
982. XSLTC A compiling version of XSLT.
983. zip file A file used to store compressed versions of files. In connection with Java bytecode files, these have largely been superseded by Java Archive (JAR) files.