Constructor Definition & Meaning
A constructor initializes an object in object-oriented programming. In many programming languages, a constructor has the same name as the class in which it creates the object. A programmer will typically declare a constructor within the class and then define the data types that make up the ensuing object.
Common types of constructors
Default constructors: what the program automatically inserts if no constructor is defined. This depends on the language, but typically a default constructor sets everything within the new object to its default value (such as 0) and defines no arguments. It can also set default parameters but is still considered a default constructor.
Parameterized constructor: has parameters which identify arguments once a new object is initialized. The program automatically calls a constructor, which a programmer designs with certain parameters.
Copy constructor: creates a new object by making a copy of a preexisting one. Typically these objects must be in the same class.
Conversion constructor: does not have a specific (explicit) declaration; instead, the program implies the declaration. If a constructor is only given one parameter, the program may convert an object to another class or type implicitly. This is also referred to as a converting constructor.
Move constructor: transfers a pointer to different data or assigns the data to another object, instead of using a copy constructor. The data type moves rather than being copied.
Stay up to date on the latest developments in Internet terminology with a free newsletter from Webopedia. Join to subscribe now.
From A3 to ZZZ we list 1,559 text message and online chat abbreviations to help you translate and understand today's texting lingo. Includes Top... Read More »Huge List of Computer Certifications
Have you heard about a computer certification program but can't figure out if it's right for you? Use this handy list to help you decide. Read More »
Computer architecture provides an introduction to system design basics for most computer science students. Read More »Network Fundamentals Study Guide
Networking fundamentals teaches the building blocks of modern network design. Learn different types of networks, concepts, architecture and... Read More »The Five Generations of Computers
Learn about each of the five generations of computers and major technology developments that have led to the computing devices that we use... Read More »