Removing object from ArrayList in for each loop

Question

I would like to remove an object from an ArrayList when I\'m done with it, but I can\'t find way to do it. Trying to remove it like in the sample code below doe

Answer 1

You can't, within the enhanced for loop. You have to use the "long-hand" approach:

for (Iterator iterator = pixels.iterator(); iterator.hasNext(); ) {
  Pixel px = iterator.next();
  if(px.y > gHeigh){
    iterator.remove();
  }
}

Of course, not all iterators support removal, but you should be fine with ArrayList.

An alternative is to build an additional collection of "pixels to remove" then call removeAll on the list at the end.