Objects, Classes, and Instances Flashcards

Study Notes

Classes and Objects

Class serves as a template for creating objects, defining the properties and behaviors they contain.
Often compared to a recipe or blueprint, it organizes data and methods.

Objects

Objects represent physical items in software, encapsulating both data and methods for data manipulation.
They serve as instances of classes, holding specific values and functionalities.

Instances

An instance is a unique object created from a class using the constructor method.
Represents a concrete realization of the class, akin to a specific version of an object.

Instance Variables

Instance variables store the data specific to an object, essentially holding the object's state.
Each object can have different values for its instance variables, defining its individuality.

Instance Methods

Instance methods are functions defined within a class, enabling objects to manipulate and access their instance variables.
They facilitate interaction with the object's data, enhancing functionality.

Constructor Method

The constructor method is a special function invoked to create an instance of a class.
Initializes the instance variables during the object's creation process.

Operator "new"

The "new" operator is employed to instantiate an object, effectively calling the constructor method associated with the class.
It allocates memory for the new object and prepares it for use.

Mutator Methods

Mutator methods, often prefixed with "set," allow modification of instance variables.
They provide a controlled way to change the state of an object.

Accessor Methods

Accessor methods, commonly starting with "get," enable retrieval of an object's data without altering its state.
They provide a mechanism for safe access to the instance variables, often called "getters."

Description

Test your knowledge on the concepts of objects, classes, and instances in programming. These flashcards cover key definitions and usages to help you understand how data is organized and manipulated in object-oriented programming. Perfect for students and enthusiasts looking to reinforce their understanding of these fundamental concepts.