Method (computer programming): Difference between revisions

Revision as of 22:39, 28 June 2023

Revision as of 02:47, 8 July 2023

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===Constructors===

{{Main|Constructor (computer science)}}

A [[Constructor (computer science)|''constructor'']] is a method that is called at the beginning of an object's lifetime to create and initialize the object, a process called [[object creation|construction]] (or ''instantiation''). Initialization may include an acquisition of resources. Constructors may have parameters but usually do not return values in most languages. See the following example in Java:

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===Destructors===

{{Main|Destructor (computer science)}}

A ''[[Destructor (computer science)|destructor]]'' is a method that is called automatically at the end of an object's lifetime, a process called [[object lifetime|destruction]]. Destruction in most languages does not allow destructor method arguments nor return values. Destruction can be implemented so as to perform cleanup chores and other tasks at object destruction.

====Finalizers====

In [[Garbage collection (computer science)|garbage-collected]] languages, such as [[Java (programming language)|Java]],<ref name=Bloch>{{cite book | title= "Effective Java: Programming Language Guide" |last=Bloch| first=Joshua| publisher=Addison-Wesley | edition=third | isbn=978-0134685991| year=2018}}</ref>{{rp|26, 29}} [[C Sharp (programming language)|C#]]<ref name=Albahari>{{cite book |last=Albahari |first=Joseph |title= C# 10 in a Nutshell |publisher= O'Reilly |isbn= 978-1-098-12195-2}}</ref>{{rp|208-209}}</ref>, and [[Python (programming language)|Python]], destructors are known as ''[[finalizer]]s''. They have a similar purpose and function to destructors, but because of the differences between languages that utilize garbage-collection and languages with manual memory management, the sequence in which they are called is different.

==Abstract methods==