enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Instance variable - Wikipedia

    en.wikipedia.org/wiki/Instance_variable

    In class-based, object-oriented programming, an instance variable is a variable defined in a class (i.e., a member variable), for which each instantiated object of the class has a separate copy, or instance. [1] [2] An instance variable has similarities with a class variable, [3] but is non-static.

  3. Instance (computer science) - Wikipedia

    en.wikipedia.org/wiki/Instance_(computer_science)

    In computer science, an instance is an occurrence of a software element that is based on a type definition. When created, an occurrence is said to have been instantiated , and both the creation process and the result of creation are called instantiation .

  4. Interface (Java) - Wikipedia

    en.wikipedia.org/wiki/Interface_(Java)

    An interface in the Java programming language is an abstract type that is used to declare a behavior that classes must implement. They are similar to protocols.Interfaces are declared using the interface keyword, and may only contain method signature and constant declarations (variable declarations that are declared to be both static and final).

  5. Class (computer programming) - Wikipedia

    en.wikipedia.org/wiki/Class_(computer_programming)

    In a language that supports inheritance, an abstract class, or abstract base class (ABC), is a class that cannot be directly instantiated. By contrast, a concrete class is a class that can be directly instantiated. Instantiation of an abstract class can occur only indirectly, via a concrete subclass.

  6. Factory method pattern - Wikipedia

    en.wikipedia.org/wiki/Factory_method_pattern

    According to Design Patterns: Elements of Reusable Object-Oriented Software: "Define an interface for creating an object, but let subclasses decide which class to instantiate. Factory method lets a class defer instantiation to subclasses." [2] Creating an object often requires complex processes not appropriate to include within a composing object.

  7. Object-oriented programming - Wikipedia

    en.wikipedia.org/wiki/Object-oriented_programming

    Many widely used languages, such as C++, Java, and Python, provide object-oriented features. Although in the past object-oriented programming was widely accepted, [ 51 ] more recently essays criticizing object-oriented programming and recommending the avoidance of these features (generally in favor of functional programming ) have been very ...

  8. Primitive wrapper class in Java - Wikipedia

    en.wikipedia.org/.../Primitive_wrapper_class_in_Java

    Primitive wrapper classes are not the same thing as primitive types. Whereas variables, for example, can be declared in Java as data types double, short, int, etc., the primitive wrapper classes create instantiated objects and methods that inherit but hide the primitive data types, not like variables that are assigned the data type values.

  9. Abstract type - Wikipedia

    en.wikipedia.org/wiki/Abstract_type

    In programming languages, an abstract type (also known as existential types) [1] is a type in a nominative type system that cannot be instantiated directly; by contrast, a concrete type can be instantiated directly. Instantiation of an abstract type can occur only indirectly, via a concrete subtype.