ConcurrentModificationException
Explore the causes and scenarios of ConcurrentModificationException in Java. Understand how concurrent modifications during iteration trigger this exception in both single-threaded and multithreaded contexts. Learn the role of different map types, including why ConcurrentHashMap is designed for safe concurrent use. Gain insight into handling data consistency and exceptions in multithreaded Java programs.
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Single Thread Environment
The name ConcurrentModificationException may sound related to concurrency, however, the exception can be thrown while a single thread operates on a map. In fact, ConcurrentModificationException isn’t even part of the java.util.concurrent package. The exception occurs when a map is modified at the same time (concurrently) any of its collection views (keys, values or entry pairs) is being traversed. The ...