"AWT-EventQueue-0" java.lang.ClassCastException: [Ljava.lang.Object; cannot be cast to Bebidas

Asked Nov 26 '15 at 17:39

Active Nov 26 '15 at 17:49

Viewed 21 times

Here is where the code is throwing the error:

public class ArrayPila<E extends Bebidas> implements Pila<E>{
  private static final int TAMAÑO=5;
  private E []arP;
  private int tope;

  public ArrayPila() {
    arP=(E[]) new Object[TAMAÑO];
    tope=-1;        
  }
}

I'm just creating a generic stack with a type of object (created in another class) and it gives me:

Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException: [Ljava.lang.Object; cannot be cast to [Lmis.java.clases.Bebidas;
    at mis.java.estructuras_de_apoyo.ArrayPila.<init>(ArrayPila.java:13)
    at mis.java.miformulario.VentanaP.<init>(VentanaP.java:67).

Could you please help?

edited Nov 26 '15 at 17:49

Davide Pastore

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asked Nov 26 '15 at 17:39

Giovani Rubini

You can't cast "down". `E` is a potential subclass of `Object`. – OneCricketeer Nov 26 '15 at 17:43
and how could i fix it then? – Giovani Rubini Nov 26 '15 at 17:50
Have you tried `new Bebidas[TAMAÑO]`? In fact, you should probably define `arP` as `Bebidas[]` instead of `E[]` as the only thing you know about `E` is that it is a `Bebidas` subclass. – RealSkeptic Nov 26 '15 at 18:07
i couldn't cast the E so i erased extends and it worked – Giovani Rubini Nov 26 '15 at 19:10

"AWT-EventQueue-0" java.lang.ClassCastException: [Ljava.lang.Object; cannot be cast to Bebidas

0 Answers0