Message

To be clear. The content here is a content based on a free course. Noone can reproduce this material. If you wanna to know this material, my advice is to you access the free course. And if they end the course or start to ask money to study in the course? Well, this considerations are out of my control, but the DIO material is excelent and the course is amazing! If you acquire a DIO paln, you will have access to amazing courses.

challenge

The repository of Camila.

As I already did all the things of the videos, I will try to explain the concepts and how a particular concept is used:

Abstraction

To make the modeling of a particular class, Dev (developer) as example, we need to use abstraction. In the real world the Dev is a person, but we needed to concentrate in the main characteristics to build the system and ignore the other ones. As example, in the real world one Dev can eat, but it is not important to us. To us was important that one dev can 'progredir' (progress) in a Bootcamp.

Encapsulation

In the Curso (course) class for example, we don't have access to the cargaHoraria property. But we can change and retrieve the value with the methods getCargaHoraria() and setCargaHoraria().

Inheritance

The Curso (course) class and Mentoria (mentoring) class inherits from Conteudo (content).

Polymorphism

As example see this line in the Dev class of the package br.com.dio.desafio.dominio:

    public void setConteudosInscritos(Set<Conteudo> conteudosInscritos) {
        this.conteudosInscritos = conteudosInscritos;
    }

Conteudo is a generic abstract class. But Curso (course) and Mentoria(mentoring) classes inherits from Conteudo. This way, as we wanna a Curso or a Mentoria class in the set, we can set the type Conteudo inside the "generics" identifier (<>). This is polymorphism.