Java - Iterator

Iterator

import java.util.*;
List xs = new ArrayList<>(List.of(1,2,3));
for (Iterator it = xs.iterator(); it.hasNext();) {
  int v = it.next();
  if (v % 2 == 0) it.remove(); // safe removal
}

Use the iterator’s remove method to avoid ConcurrentModificationException.

Try it

1. Remove even numbers from a list using an explicit iterator safely.
2. Compare with removeIf using a predicate.