Clase4.java

public class Clase4{

  public static void main(String[] args){

    //objects Pantalla
    //received paramater from the constructor on Class Pantalla
    Pantalla pantalla = new Pantalla(5);
    Pantalla pantalla2 = new Pantalla(5);
    //False because even though they have the same data they are different
    System.out.println(pantalla == pantalla2)
    //Objects Celular iPhone and Galaxy
    /* Question: why did we wrote pantalla? I know that the String is there
     because of the constructor on the Celular Class, String modelo but what's the
     Pantalla pantalla?  */
    Celular iPhone = new Celular(" iPhone X ", pantalla);
    Celular galaxy = new Celular(" Galaxy S9 ", pantalla);
    /* Question: From where does the iPhone.getPantalla() comes from?
    what are we doing here? */
    System.out.println(pantalla == iPhone.getPantalla())
    //Here we are using the objects with the behaviours, nothing complicated
    pantalla.encenderse();
    pantalla2.encenderse();
    //Third object but what does the iPhone.getPantalla(); do?
    //If it's an object why we didn't wrote new?
    Pantalla pantalla3 = iPhone.getPantalla();
    //Apart from whatever iPhone.getPantalla() does we added the
    //.encenderse(); so it does whatever is supposed to do?
    pantalla3.encenderse();
     //Here I have no idea what's going on...
    iPhone.getPantalla().encenderse();
    System.out.println(iPhone.getPantalla().getTamanio());
    System.out.println(pantalla == pantalla3);

    galaxy.getPantalla().romper();
    System.out.println(pantalla.getTamanio());
    System.out.println(iPhone.getPantalla().getTamanio());
  }
}