Java , Removing object from ArrayList

Question

I have ClassA which has a static ArrayList of Objects

public static ArrayList meteorits = new ArrayList();

Answer 1

When using an iterator; you need to use the iterator to remove items from a list using this:

iterator.remove();

which from the Java Docs says:

Removes from the underlying collection the last element returned by this iterator.

Removing a item from the list by any other means will result in the ConcurrentModificationException you are seeing.