abstract class

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abstract class

(programming)
In object-oriented programming, a class designed only as a parent from which sub-classes may be derived, but which is not itself suitable for instantiation. Often used to "abstract out" incomplete sets of features which may then be shared by a group of sibling sub-classes which add different variations of the missing pieces.

abstract class

Also called an "abstract superclass," in object technology, it is a class created as a master structure. No objects of an abstract class are created, rather subclasses of the abstract class are defined with their own variations, and the subclasses are used to create the actual objects.
References in periodicals archive ?
IP can enable an abstract type of redundancy that is just not possible with any other technology.
In a class, we can specify types: build-in types, abstract type (sorts), and compound types (x for Cartesian Product, -set for Set, * for List, [?
Consider a host-provided interface for an abstract type of file handles, fh, that includes operations to create and use them (Figure 1).
Because Ada is so supportive of abstract type definitions, it was relatively easy to produce an Ada language binding.
In figure 2 we apply this kind of step to abstract type State.
If the member functions needed for the abstract type are nonvirtual member functions, introducing an abstract superclass is not possible either, since it would modify the behavior.
Sor example, in the Trellis library, Collection is an abstract type that specifies how a type that acts as a collection must behave.
Java developers can also easily ask complex questions about their code, such as "Where are subclasses of this abstract type instantiated?
1] According to the Tate Museum, biomorphic--derived from the Greek words "bios," which means life, and "morphe," which means form--was initially used during the 1930s "to describe the imagery in the more abstract types of surrealist painting and sculpture" (http://www.
The plot is schematic and the characters--even the principal figure, Santiago the shepherd boy--are abstract types.
After responding to this challenge, calling into question the proposition that abstract types cannot be caused, a second, jurisprudential challenge to intellectual property is considered.
Wonham in this book, however, eschews both of these attitudes, and argues instead that it is an inevitable anxiety rather than a contradictory expedience that leads realists to employ abstract types of ethnic caricature in their writings.