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Guys i understand objects in real life

But i never really understood objects in programming. Can someone explain to me as if i m a kid. Thank you.

22nd Jun 2020, 6:09 PM
stephen haokip
stephen haokip - avatar
1 Resposta
+ 3
Do not complicate yourself too much, you can see the objects in programming in the same way that you see them in real life, a door for example, has height, width, color, which would be the attributes of that door, which in programming would be: class Door { // attributes int width; int heigth; Color color; // constructor public Door (int _width, int _heigth, Color _color) { width = _width; heigth = _heigth; color = _color; } } This way you would have a class that would work like a blueprint for a door. Door myDoor = new Door (50, 100, new Color (0,0,0)); In this way "myDoor" is an object of type "Door" to which we can access its attributes either to read them or to modify them, for example: int doorWidth = myDoor.width; // get the width of "myDoor", which is currently 50 and store it in doorWidth myDoor.width = 100; // set the width of "myDoor" that changes from 50 to 100, imagine that suddenly the door of your room becomes wider myDoor.color = new Color (255,0,0); // change the color of "myDoor" from black to red You can also add methods to your objects, for example class Door { // attributes int width; int heigth; Color color; // constructor public Door (int _width, int _heigth, Color _color) { width = _width; heigth = _heigth; color = _color; } public void InvertDimensions () { int tempWidth = width; width = heigth; heigth = tempWidth; } } myDoor.width = 50; myDoor.heigth = 100; myDoor.InvertDimensions(); InvertDimensions() inverts the values ​​of the width and height attributes, so now the width would be 100 and the height 50 Now imagine you need 3 doors, you can use the same "Door" class to create them, for example: Door myDoor1 = new Door (50, 100, new Color (0,0,0)); Door myDoor2 = new Door (80, 150, new Color (0,255,0)); Door myDoor3 = new Door
22nd Jun 2020, 8:51 PM
Oscar Diaz