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2. Object-oriented programming - Wikipedia

   en.wikipedia.org/wiki/Object-oriented_programming

   Object-oriented programming (OOP) is a programming paradigm based on the concept of objects, [1] which can contain data and code: data in the form of fields (often known as attributes or properties), and code in the form of procedures (often known as methods).

3. Interface (object-oriented programming) - Wikipedia

   en.wikipedia.org/wiki/Interface_(object-oriented...

   For example, in Java, the Comparable interface specifies a method compareTo() which implementing classes must implement. This means that a sorting method, for example, can sort a collection of any objects of types which implement the Comparable interface, without having to know anything about the inner nature of the class (except that two of ...

4. Class (computer programming) - Wikipedia

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

   The various object-oriented programming languages enforce member accessibility and visibility to various degrees, and depending on the language's type system and compilation policies, enforced at either compile time or runtime. For example, the Java language does not allow client code that accesses the private data of a class to compile. [12]

5. Java (programming language) - Wikipedia

   en.wikipedia.org/wiki/Java_(programming_language)

   Java is a high-level, class-based, object-oriented programming language that is designed to have as few implementation dependencies as possible. It is a general-purpose programming language intended to let programmers write once, run anywhere (), [16] meaning that compiled Java code can run on all platforms that support Java without the need to recompile. [17]

6. Composition over inheritance - Wikipedia

   en.wikipedia.org/wiki/Composition_over_inheritance

   Composition over inheritance (or composite reuse principle) in object-oriented programming (OOP) is the principle that classes should favor polymorphic behavior and code reuse by their composition (by containing instances of other classes that implement the desired functionality) over inheritance from a base or parent class. [2]

7. Object-oriented analysis and design - Wikipedia

   en.wikipedia.org/wiki/Object-oriented_analysis...

   Object-oriented analysis and design (OOAD) is a technical approach for analyzing and designing an application, system, or business by applying object-oriented programming, as well as using visual modeling throughout the software development process to guide stakeholder communication and product quality.

8. Singleton pattern - Wikipedia

   en.wikipedia.org/wiki/Singleton_pattern

   In object-oriented programming, the singleton pattern is software design pattern that restricts the instantiation of a class to a singular instance. It is one of the well-known "Gang of Four" design patterns , which describe how to solve recurring problems in object-oriented software. [ 1 ]

9. Class-based programming - Wikipedia

   en.wikipedia.org/wiki/Class-based_programming

   Class-based programming, or more commonly class-orientation, is a style of object-oriented programming (OOP) in which inheritance occurs via defining classes of objects, instead of inheritance occurring via the objects alone (compare prototype-based programming).