In software engineering

Software engineering

Software Engineering is the application of a systematic, disciplined, quantifiable approach to the development, operation, and maintenance of software, and the study of these approaches; that is, the application of engineering to software...

, creational design patterns are design patterns

Design pattern (computer science)

In software engineering, a design pattern is a general reusable solution to a commonly occurring problem within a given context in software design. A design pattern is not a finished design that can be transformed directly into code. It is a description or template for how to solve a problem that...

 that deal with object creation

Object lifetime

In computer science, the object lifetime of an object in object-oriented programming is the time between an object's creation till the object is no longer used, and is destructed or freed.In object-oriented programming , the meaning of creating objects is far more subtle than simple...

 mechanisms, trying to create objects in a manner suitable to the situation. The basic form of object creation could result in design problems or added complexity to the design. Creational design patterns solve this problem by somehow controlling this object creation. Creational design patterns are further categorized into Object-creational patterns and Class-creational patterns. Where, Object-creational patterns deal with Object creation and Class-creational deal with Class-instantiation.

Some examples of creational design patterns include:

• Abstract factory pattern
  Abstract factory pattern
  The abstract factory pattern is a software design pattern that provides a way to encapsulate a group of individual factories that have a common theme. In normal usage, the client software creates a concrete implementation of the abstract factory and then uses the generic interfaces to create the...
  
  : centralize decision of what factory
  Factory method pattern
  The factory method pattern is an object-oriented design pattern to implement the concept of factories. Like other creational patterns, it deals with the problem of creating objects without specifying the exact class of object that will be created.The creation of an object often requires complex...
  
   to instantiate
• Factory method pattern
  Factory method pattern
  The factory method pattern is an object-oriented design pattern to implement the concept of factories. Like other creational patterns, it deals with the problem of creating objects without specifying the exact class of object that will be created.The creation of an object often requires complex...
  
  : centralize creation of an object of a specific type choosing one of several implementations
• Builder pattern
  Builder pattern
  The builder pattern is an object creation software design pattern. The intention is to abstract steps of construction of objects so that different implementations of these steps can construct different representations of objects...
  
  : separate the construction of a complex object from its representation so that the same construction process can create different representations
• Lazy initialization pattern: tactic of delaying the creation of an object, the calculation of a value, or some other expensive process until the first time it is needed
• Object pool pattern: avoid expensive acquisition and release of resources by recycling objects that are no longer in use
• Prototype pattern
  Prototype pattern
  The prototype pattern is a creational design pattern used in software development when the type of objects to create is determined by a prototypical instance, which is cloned to produce new objects...
  
  : used when the type of objects to create is determined by a prototypical instance, which is cloned to produce new objects
• Singleton pattern
  Singleton pattern
  In software engineering, the singleton pattern is a design pattern used to implement the mathematical concept of a singleton, by restricting the instantiation of a class to one object. This is useful when exactly one object is needed to coordinate actions across the system...
  
  : restrict instantiation of a class to one object

See also

• Behavioral pattern
  Behavioral pattern
  In software engineering, behavioral design patterns are design patterns that identify common communication patterns between objects and realize these patterns...
  
  
• Structural pattern
  Structural pattern
  In software engineering, structural design patterns are design patterns that ease the design by identifying a simple way to realize relationships between entities.Examples of Structural Patterns include:...
  
  
• Concurrency pattern
  Concurrency pattern
  In software engineering, concurrency patterns are those types of design patterns that deal with multi-threaded programming paradigm.Examples of this class of patterns include:* Active Object* Balking pattern* Double checked locking pattern...