Java definitions beginning with A

absolute filename - permalink - collapse

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A filename whose full path is unambiguously given starting from the top (root) of a file system tree. For instance
```
 c:\Java\bin\javac.exe 
```
See relative filename.
David J. Barnes - Cite This Source - This Definition
Browse Related Terms: asant, cHTML (Compact HTML), relative filename, UTF

abstract - permalink - collapse

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A Java keyword used in a class definition to specify that a class is not to be instantiated, but rather inherited by other classes. An abstract class can have abstract methods that are not implemented in the abstract class, but in subclasses.
Sun Microsystems - Cite This Source - This Definition
Browse Related Terms: abstract class, abstract method, Abstraction, final class, final method, Java Foundation Classes (JFC), JFC, object-oriented design

abstract class - permalink - collapse

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A class that contains one or more abstract methods, and therefore can never be instantiated. Abstract classes are defined so that other classes can extend them and make them concrete by implementing the abstract methods.
Sun Microsystems - Cite This Source - This Definition
A class with the abstract reserved word in its header. Abstract classes are distinguished by the fact that you may not directly construct objects from them using the new operator. An abstract class may have zero or more abstract methods.
David J. Barnes - Cite This Source - This Definition
Browse Related Terms: abstract, abstract method, Abstraction, final class, final method, Java Foundation Classes (JFC), JFC, object-oriented design

Abstraction - permalink - collapse

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A simplified representation of something that is potentially quite complex. It is often not necessary to know the exact details of how something works, is represented or is implemented, because we can still make use of it in its simplified form. Object-oriented design often involves finding the right level of abstraction at which to work when modeling real-life objects. If the level is too high, then not enough detail will be captured. If the level is too low, then a program could be more complex and difficult to create and understand than it needs to be.
David J. Barnes - Cite This Source - This Definition
Browse Related Terms: abstract, abstract class, abstract method, final class, final method, Java Foundation Classes (JFC), JFC, object-oriented design

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abstract method - permalink - collapse

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A method that has no implementation.
Sun Microsystems - Cite This Source - This Definition
A method with the abstract reserved word in its header. An abstract method has no method body. Methods defined in an interface are always abstract. The body of an abstract method must be defined in a sub class of an abstract class, or the body of a class implementing an interface.
David J. Barnes - Cite This Source - This Definition
Browse Related Terms: abstract, abstract class, Abstraction, final class, final method, Java Foundation Classes (JFC), JFC, object-oriented design

abstract schema - permalink - collapse

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The part of an entity bean's deployment descriptor that defines the bean's persistent fields and relationships.

Sun Microsystems - Cite This Source - This Definition
Browse Related Terms: cascade delete, entity bean, Persistence, persistent field, relationship field

abstract schema name - permalink - collapse

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A logical name that is referenced in EJB QL queries.

Sun Microsystems - Cite This Source - This Definition
Browse Related Terms: caller, EJB, EJB container, EJB container provider, EJB context, EJB home object, EJB JAR file, EJB module, EJB object, EJB server provider, enterprise bean provider, Enterprise JavaBeans (EJB), Enterprise JavaBeans Query Language (EJB QL)

Abstract Window Toolkit (AWT) - permalink - collapse

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A collection of graphical user interface (GUI) components that were implemented using native-platform versions of the components. These components provide that subset of functionality which is common to all native platforms. Largely supplanted by the Project Swing component set. See also Swing.
Sun Microsystems - Cite This Source - This Definition
Browse Related Terms: AWT (Abstract Windowing Toolkit), LCDUI (Liquid Crystal Display User Interface), peer, Swing

Access Control - permalink - collapse

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The methods by which interactions with resources are limited to collections of users or programs for the purpose of enforcing integrity, confidentiality, or availability constraints.
Sun Microsystems - Cite This Source - This Definition
The methods by which interactions with resources are limited to collections of users or programs for the purpose of enforcing integrity, confidentiality, or availability constraints.

Sun Microsystems - Cite This Source - This Definition
Browse Related Terms: anonymous access, Authorization, authorization constraint, deadlock, property, user (security)

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accessor method - permalink - collapse

All > Technology > Programming > Java

A method specifically designed to provide access to a private attribute of a class. By convention, we name accessors with a get prefix followed by the name of the attribute being accessed. For instance, the accessor for an attribute named speed would be getSpeed. By making an attribute private, we prevent objects of other classes from altering its value other than through a mutator method. Accessors are used both to grant safe access to the value of a private attribute and to protect attributes from inspection by objects of other classes. The latter goal is achieved by choosing an appropriate visibility for the accessor.
David J. Barnes - Cite This Source - This Definition
Browse Related Terms: Attribute, mutator method, State

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ACID - permalink - collapse

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The acronym for the four properties guaranteed by transactions: atomicity, consistency, isolation, and durability.
Sun Microsystems - Cite This Source - This Definition
The acronym for the four properties guaranteed by transactions: atomicity, consistency, isolation, and durability.

Sun Microsystems - Cite This Source - This Definition
Browse Related Terms: bean-managed transaction, Commit, container-managed transaction, Java Transaction API (JTA), Java Transaction Service (JTS), JTS, OTS, rollback, session bean, transaction, transaction attribute, transaction isolation level, transaction manager

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activation - permalink - collapse

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The process of transferring an enterprise bean from secondary storage to memory. (See passivation.)

Sun Microsystems - Cite This Source - This Definition
Browse Related Terms: address space, archiving, object serialization, passivation, preverification, Random Access Memory, swizzling

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actor - permalink - collapse

All > Technology > Programming > Java

See client.
David J. Barnes - Cite This Source - This Definition
Browse Related Terms: application client, application client container, distributed application, JAXR client, JAXR provider

actual argument - permalink - collapse

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The value of an argument passed to a method from outside the method. When a method is called, the actual argument values are copied into the corresponding formal arguments. The types of the actual arguments must be compatible with those of the formal arguments.
David J. Barnes - Cite This Source - This Definition
Browse Related Terms: argument, command-line argument, formal argument, instanceof, message passing, method header, method signature

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agent - permalink - collapse

All > Technology > Programming > Java

See server.
David J. Barnes - Cite This Source - This Definition
Browse Related Terms: Client, Common Gateway Interface, HTTP (HyperText Transfer Protocol), JavaScript, JavaServer Faces Technology, POA, registry, server, service endpoint interface, user data constraint, Web container provider, Web server, Web server provider, well-known port

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aggregation - permalink - collapse

All > Technology > Programming > Java

A relationship in which an object contains one or more other subordinate objects as part of its state. The subordinate objects typically have no independent existence separate from their containing object. When the containing object has no further useful existence, neither do the subordinate objects. For instance, a gas station object might contain several pump objects. These pumps will only exist as long as the station does. Aggregation is also referred to as the has-a relationship, to distinguish it from the is-a relationship, which refers to inheritance.
David J. Barnes - Cite This Source - This Definition
Browse Related Terms: class inheritance, has-a relationship, implements clause, Inheritance, interface inheritance, is-a relationship, multiple inheritance, polymorphism, single inheritance

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aliases - permalink - collapse

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Multiple references to a single object. Messages may be sent to the object via any of its aliases. A resulting state change will be detectable by all.
David J. Barnes - Cite This Source - This Definition
Browse Related Terms: finalization, garbage collection, garbage collector, memory leak, object reference

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Java (1,096) : A B C D E F G H I J K L M N O P Q R S T U V W X Y Z #

ExpertGlossary

absolute filename - permalink - collapse

abstract - permalink - collapse

abstract class - permalink - collapse

Abstraction - permalink - collapse

abstract method - permalink - collapse

abstract schema - permalink - collapse

abstract schema name - permalink - collapse

Abstract Window Toolkit (AWT) - permalink - collapse

Access Control - permalink - collapse

accessor method - permalink - collapse

ACID - permalink - collapse

activation - permalink - collapse

actor - permalink - collapse

actual argument - permalink - collapse

actual parameter - permalink - collapse

actual parameter list - permalink - collapse

address space - permalink - collapse

agent - permalink - collapse

aggregation - permalink - collapse

aliases - permalink - collapse

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