Need Java Help Java, Arraylist and removal

Every time I try to call ArrayList.remove() on an element while in a for each loop, Java throws a ConcurrentModificationException.  I need to remove an element in a for loop because in there is where I look through the objects to find objects which meet the criteria for removal.

>>7
This has nothing to do with thread-safe problems. This is due to a moron who doesn't understand what the sugar syntactic interator for loop :

        for(Renderable renderable:renderables){

requires from its user.