java ArrayList remove object while iterating [duplicate]

Question

I'm running an iterator over an arraylist and am trying to remove an item when a condition is true.

I have the following code:

String item = (String) model.getElementAt(selectedIndices[i]);
Iterator it = p.eggMoves.iterator();
while(it.hasNext())
{
    String text = (String) it.next();
    if ( text.equals(item) )
    {
        it.remove();
        p.eggMoves.remove(selectedIndices[i]);
        model.removeElementAt(selectedIndices[i]);
    }
}

Now this code works fine, the item is removed from both the p object and the jlist, but it throws an "ConcurrentModificationException" exception at the it.next() line.

How do I solve this?

Answer 1

Just remove the item by using it.remove() while iterating.

Below line is causing the issue

p.eggMoves.remove(selectedIndices[i]);

---

What you want to do by removing same item (that is at index i) again and again?

Answer 2

There is no need to call both it.remove(); and p.eggMoves.remove(selectedIndices[i]);. The call to it.remove(); will remove the current item from p.eggMoves.

Remove the call to p.eggMoves.remove(selectedIndices[i]); and it should work fine.