Additional Notes
What happens if you modify a List while iterating over it using a for-each loop?
Track: Java
Topic: Collections
Focus: List Interface and ArrayList
Java: List Interface and ArrayList
Answer
Causes ConcurrentModificationException. Frame the concept in practical terms so you can explain it during interview discussion.
Modifying a List during iteration with a for-each loop leads to ConcurrentModificationException because the iterator detects structural changes. Use an Iterator if you need to modify the list while iterating.
Modifying a List during iteration with a for-each loop leads to ConcurrentModificationException because the iterator detects structural changes. Use an Iterator if you need to modify the list while iterating.
Topics: Collections Java List Interface and ArrayList