What's wrong with my code ?

Question concernant la tâche

En discussion

Dans le constructeur de la classe Chat, à savoir public Chat(), incrémente le nombre de chats (la variable static nombreChats de la classe Chat) de 1. Décrémente cette variable de 1 dans la méthode finalize.

Exigences :

Ajoute un constructeur sans paramètres à la classe Chat, c'est-à-dire public Chat().
Le constructeur doit incrémenter la valeur de la variable nombreChats de 1.
Ajoute la méthode finalize à la classe Chat.
La méthode finalize ne doit rien renvoyer (le type de retour est void).
La méthode finalize doit réduire la variable nombreChats de 1.

package fr.codegym.task.task06.task0604; /* Compteur de chats */ public class Chat { public static int nombreChats = 0; public void Chat(int nombreChats){ Chat.nombreChats += 1; } protected void finalize(int nombreChats) throws Throwable{ Chat.nombreChats -= 1; } public static void main(String[] args) { } }

Commentaires (3)

Populaires
Nouveaux
Anciens

Vous devez être connecté pour laisser un commentaire

Guadalupe Gagnon

Niveau 37 , Tampa, United States

27 août 2020, 15:02

You need to add a constructor to this code (Line 10 is a method and not a constructor). I recommend reading up on constructors if you are unsure what that means. The constructor for this task in the first requirement does not call for any arguments. Make sure that the constructor in this code has none as well. The finalize method is already declared as part of the Object class and needs to be over written in this task to do what the conditions ask for. To override a method properly you need to match the method's signature while the access can not be stricter than the parent's method. The signature is: 1) the return value 2) the method name 3) the method's arguments Make sure that the implementation matches or you will not be over riding the method so much as over loading it instead (line 13 is an over loaded finalize implementation).

david

Niveau 10

22 décembre 2020, 08:54

I don t have a clue what you are talking about. Is this exercise supposed to be easy?

Guadalupe Gagnon

Niveau 37 , Tampa, United States

22 décembre 2020, 14:06

It is really easy, however when you are learning everything brand new it seems like a mountain of information. Look up constructors , how they differ from methods, how to implement them, and how to override a method. Make sure you look these up as Java articles and not another object orientated language like C# or anything.