DCIT50 - Lecture 4-6

Encapsulation

A way of keeping things organized in programming

Encapsulation, Class

It means wrapping data (variables) and data (methods) in a single unit, called what?

Encapsulation

Hides the internal details and allows only specific parts to be accessed

protect important data

We use encapsulation to __ and keep things simple

control how it’s accessed or modified

We use encapsulation whenever we need to protect data and __

exposing only what’s necessary

Encapsulation is useful when you want to simplify how others use your code by __

private

When using encapsulation, we declare attributes as __

Setter

A method used to set or update the value of a private variable in a class

invalid or unexpected values

Without a setter, the variable might be changed to __

Getter

A method used to retrieve or “get” the value of a private variable

provides safe access

Getters __ to the variable without directly exposing it

Polymorphism

The ability of a single function, method, or object to take on different forms

Poly (many) and Morph (forms)

Polymorphism comes for the Greek words __

method overriding and method overloading

Polymorphism allows a single interface to represent different types of objects or behaviors through __

Method overloading

Occurs when multiple methods in the same class have same name but different parameter lists

Method overriding

Occurs when a subclass provides a specific implementation for a method that is already defined in its parent class

Abstraction

The process of hiding unnecessary details and showing only the essential features of an object or a concept

cannot be instantiated

Abstract classes __ because it is designed to serve as a blueprint for other classes

Abstract method

Can only be declared inside an abstract class

Abstract method

A method without a body and needs to be overriden

Interface

Is like a contract or a blueprint

Interface

Are used to achieve 100% abstraction

static and final

In abstraction, any variable that you declare would be __

default modifier

Inside an abstract method, you can use the __ to create a method with a body

Implements keyword

Used after the class name to implement an interface in that certain class