Cannot convert type in Iterable implementation in Java

Question

I have the error:

 Type mismatch: cannot convert from element type Object to Card

with the following code:

Deck Removal
....
for (Card c : Removal)
        d.removeCard(c);

This is the iterator method in my deck class:

@Override
public Iterator<Card> iterator()
{
    return deck.iterator();
}

The underlying structure for the deck is Vector<Card>. My iterator is returning type Card. Why is it telling me it's Object in the for loop?

I can do the following and then the error would go away but that's quite stupid since I'm already supposed to return Cards instead of Objects.

Deck Removal
....
for (Object c : Removal)
        d.removeCard((Card)c);

Thanks

fyi Vector is only used in out-of-date educational materials. In the real world, it is a long-abandoned, deprecated and broken class. — Bohemian
– Bohemian ♦, Commented Oct 6, 2014 at 12:08

Eran · Accepted Answer · 2014-10-06 10:04:44Z

3

In order for the enhanced for loop over Deck to return Card objects, Deck should implement Iterable<Card>, instead of just Iterable.

answered Oct 6, 2014 at 10:04

Eran

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