fail-fast vs. fail-safe iterators

fail-fast vs. fail-safe iterators

• fail-fast is the property of all the collection classes in java.util package
• fail-safe is the property of all the collection classes in java.util.concurrent are fail-safe

Advantage of fail-safe

Fail-safe works with the clone of the underlying collection so, not affected by any modification in the collection

Fail-fast iterators throw a ConcurrentModificationException, while fail-safe iterator never throws such an exception.