ConcurrentModificationException

java · java/ConcurrentModificationException

Thrown by iterators when the underlying collection is modified while an iteration is in progress, detected by a fail-fast mechanism. Use CopyOnWriteArrayList or iterate a snapshot instead.

Also defined in

kotlin ConcurrentModificationException Thrown by a collection iterator when the underlying collection is modified while iterating over it, which would produce undefined iteration behavior.
scala ConcurrentModificationException Thrown when a Java iterator detects that the underlying collection was modified during iteration. Most Scala collections are immutable and not susceptible; this typically occurs when using mutable Java collections from Scala.

References

docs.oracle.com/en/java/javase/21/docs/api/java.base/java/lang/package-summary.html

In this namespace

← previous CloneNotSupportedException CloneNotSupportedException next → ConnectException ConnectException

AssertionError ClassCastException ClassFormatError ClassNotFoundException CloneNotSupportedException ConcurrentModificationException ConnectException EmptyStackException EnumConstantNotPresentException EOFException ExceptionInInitializerError