declarative securityMechanisms used in an application that are expressed in a declarative syntax in a deployment descriptor.
decrement operatorAn operator (--) that adds one to its operand. It has two forms: pre-decrement (--x) and post-decrement (x--).
deep copyA copy of an object in which copies of all the object's sub-components are also made. The resulting object might, in effect, be a clone of the original.
DefaultDefault occurs when a debtor is unable to meet the legal obligation of debt repayment, one form of which is the failure to promptly pay interest or…
default initial valueThe default value of any variable not explicitly initialized when it is declared.
default labelThe destination for all values used in a switch statement expression that do not have explicit case labels. A default label is optional.
definitionA declaration that reserves storage (for data) or provides implementation (for methods). See also declaration.
delegationAn assignment of administrative responsibility to a user, computer, group, or organization. [Exchange 2003]
deployerA person who installs J2EE modules and applications into an operational environment.
deployment(1) The placement of force elements in battle positions to obtain a higher state of readiness.
deployment descriptorAn XML file provided with each module and J2EE application that describes how they should be deployed.
deprecatedSomething that has been made obsolete by later versions of the API. Deprecated methods should not be used because there is no guarantee that they will…
deprecationRefers to a class, interface, constructor, method or field that is no longer recommended, and may cease to exist in a future version.
derived fromClass X is "derived from" class Y if class X extends class Y. See also subclass, superclass.
destinationIn spatial interaction, the location of the end of a trip. For example, a shop or an office where a consumer or a worker is going.
Digest authenticationAn authentication method that prompts the user for a user name and a password, also called credentials, which are hashed with other data before being…
direct recursionRecursion that results from a method calling itself.
discrete simulationIn a discrete simulation, time passes at an irregular rate that is determined by the primary events of interest in the simulation.
disk driveA hardware device used to store data. They come in many forms, such as compact disks, floppy disks and hard disks.
distributedRunning in more than one address space.
distributed applicationAn application made up of distinct components running in separate runtime environments, usually on different platforms connected via a network.
divide and conquerAn approach to problem solving that attempts to reduce an overall single large problem into multiple simpler problems.
DODesignated Office the national Office or intergovernmental organization of or acting for the Contracting State designated by the applicant under Chapter I…
do loopOne of Java's three control structures used for looping. The other two are the while loop and for loop.
documentFed. R. Civ. P. 34(a) defines a document as including writings, drawings, graphs, charts, photographs, phonorecords, and other data compilations.
Document Object ModelAn API for accessing and manipulating XML documents as tree structures. DOM provides platform-neutral, language-neutral interfaces that enables programs…
document rootThe top-level directory of a WAR. The document root is where JSP pages, client-side classes and archives, and static Web resources are stored.
dotted decimal notationThe notation used to represent the four byte values of an IP address. Each byte is represented as a value between 0 and 255, for instance 129.12.0.1.
DoubleUp System of Betting - A betting system whereby bets are doubled after a loss in hopes of recouping the previous loss.
double bufferingA graphics technique used to smooth animation. The next version of an image is drawn `behind the scenes' and then displayed in its entirety when the…
double precisionRefers to a high level of coordinate accuracy based on the possible number of significant digits that can be stored for each coordinate.
downcastA cast towards an object's dynamic type - that is, `down' the inheritance hierarchy.
DTDdocument type definition - a format specification file that accompanies documents prepared according to SGML (standard generalized markup language)…
durable subscriptionIn a JMS publish/subscribe messaging system, a subscription that continues to exist whether or not there is a current active subscriber object.
dynamic typeThe dynamic type of an object is the name of the class used to construct it. See static type.
EAR fileEnterprise Archive file. A JAR archive that contains a J2EE application.
ebXMLElectronic Business XML. A group of specifications designed to enable enterprises to conduct business through the exchange of XML-based messages.
EDGE (Enhanced Data GSM Environment)Enhanced Data GSM Environment (EDGE) is a new, faster version of GSM. EDGE is designed to support transfer rates up to 384Kbps and enable the delivery of…
edit-compile-run cycleA common part of the program development process. A source file is created initially and compiled.
EJB contextAn object that allows an enterprise bean to invoke services provided by the container and to obtain the information about the caller of a client-invoked…
EJB home objectAn object that provides the life-cycle operations (create, remove, find) for an enterprise bean.
EJB JAR fileA JAR archive that contains an EJB module.
EJB moduleA deployable unit that consists of one or more enterprise beans and an EJB deployment descriptor.
EJB objectAn object whose class implements the enterprise bean's remote interface. A client never references an enterprise bean instance directly; a client always…
EJB serverSoftware that provides services to an EJB container. For example, an EJB container typically relies on a transaction manager that is part of the EJB…
element(EH-leh-ment) A basic part of a whole. In chemistry, refers to a simple substance that cannot be broken down into smaller parts or changed into another…
elseA Java keyword used to execute a block of statements in the case that the test condition with the if keyword evaluates to false.
EmbeddedJava TechnologyThe availability of Java 2 Platform, Micro Edition technology under a restrictive license agreement that allows a licensee to leverage certain Java…
encapsulationAny method packaging an enzyme or bacterium and maintaining its normal functions. Used to immobilize cells in a bioreactor.
enterprise beanA J2EE component that implements a business task or business entity and is hosted by an EJB container; either an entity bean, a session bean, or a…
enterprise bean providerAn application developer who produces enterprise bean classes, remote and home interfaces, and deployment descriptor files, and packages them in an EJB…
enterprise information systemThe applications that constitute an enterprise's existing system for handling companywide information.
entity beanAn enterprise bean that represents persistent data maintained in a database. An entity bean can manage its own persistence or can delegate this function…
entity referenceA reference to an entity that is substituted for the reference when the XML document is parsed.
enumA Java keyword used to declare an enumerated type.
enumerated typeA data type - not directly available in Java - in which symbolic names are used for a sequence of constant numeric values.
errorError The difference between a measured value of a quantity and its true value. Different types of errors are inherent to observations.
exceptionthe temporary suspension of some essential element of a policy, procedure, or requirement caused by circumstances that are expected to return to normal at…
exception handlerThe try statement acts as an exception handler - a place where exception objects are caught and dealt with.
exclusive-or operatorThe exclusive-or operator (^) is both a boolean operator and a bit manipulation operator.
executable contentAn application that runs from within an HTML file. See also applet.
expressionA combination of operands and operators that produces a resulting value. Expressions have a resulting type, that affects the context in which they may be…
extendsClass X extends class Y to add functionality, either by adding fields or methods to class Y, or by overriding methods of class Y.
external entityAn entity that exists as an external XML file, which is included in the XML document using an entity reference.
external subsetThat part of a DTD that is defined by references to external DTD files.
factory patternA pattern of class definition that is used as a generator of instances of other classes.
fatal errorA fatal error occurs in the SAX parser when a document is not well formed or otherwise cannot be processed. See also error, warning.
FDMA (Frequency-division multiple-access)Frequency-division multiple-access (FDMA) is a mechanism for sharing a radio frequency band among multiple users by dividing it into a number of smaller…
fetch-execute cycleThe simple set of steps that are endlessly repeated by a computer's Central Processing Unit for each program instruction: `Fetch the next instruction…
fieldField A region of space at each point of which a given physical or mathematical quantity has some definite value.
FIFO (first in, first out)The (FIFO) semantics of a queue data structure. Items are removed in the order in which they arrived in the queue, so older items are always removed…
File SystemThe engine that an operating system or program uses to organize and kept track of files.
File Transfer ProtocolThe File Transfer Protocol (FTP) defines a standard set of rules that make it possible to transfer a file from one file system to another.
filterA criterion you specify to limit the results when you list or describe your Amazon EC2 resources.
filter chainA concatenation of XSLT transformations in which the output of one transformation becomes the input of the next.
filter streamAn input-output class that filters or manipulates its stream of input- or output-data in some way. Two examples are DataInputStream and DataOutputStream.
finalA Java keyword. You define an entity once and cannot change it or derive from it later.
final classA class with the final reserved word in its header. A final class may not be extended by another class.
final methodA method with the final reserved word in its header. A final method may not be overridden by a method defined in a sub class.
final variableA variable with the final reserved word in its declaration. A final may not assigned to once it has been initialized.
finalizationImmediately before an object is garbage collected, its finalize method is called.
finallyA Java keyword that executes a block of statements regardless of whether a Java Exception, or run time error, occurred in a block defined previously by…
finally clausePart of a try statement that is always executed, either following the handling a caught exception, or normal termination of the protected statements.
finder methodA method defined in the home interface and invoked by a client to locate an entity bean.
Float1) The amount of uncollected funds represented by checks in the possession of one bank but drawn on other banks.