Cognitive Technology Team
Jun 23, 2024 · Fundamentals
Understanding Fail-Fast Iterators and ConcurrentModificationException in Java Collections
The article explains why fail‑fast iterators throw ConcurrentModificationException when a collection is modified during iteration, outlines two common scenarios that trigger the exception, and presents both incorrect and correct Java code examples along with strategies such as avoiding modifications, using synchronization, iterator.remove(), or switching to fail‑safe concurrent collections.
CollectionsConcurrencyConcurrentModificationException
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