Java Platform 1.2

Class ConcurrentModificationException


public class ConcurrentModificationException
extends RuntimeException

This exception may be thrown by methods that have detected concurrent modification of a backing object when such modification is not permissible.

For example, it is not permssible for one thread to modify a Collection while another thread is iterating over it. In general, the results of the iteration are undefined under these circumstances. Some Iterator implementations (including those of all the collection implementations provided by the JDK) may choose to throw this exception if this behavior is detected. Iterators that do this are known as fail-fast iterators, as they fail quickly and cleanly, rather that risking arbitrary, non-deterministic behavior at an undetermined time in the future.

See Also:
Collection, Iterator, ListIterator, Vector, LinkedList, HashSet, Hashtable, TreeMap, AbstractList, Serialized Form

Constructor Summary
          Constructs a ConcurrentModificationException with no detail message.
ConcurrentModificationException(String message)
          Constructs a ConcurrentModificationException with the specified detail message.
Methods inherited from class java.lang.Throwable
fillInStackTrace, getLocalizedMessage, getMessage, printStackTrace, printStackTrace, printStackTrace, toString
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail


public ConcurrentModificationException()
Constructs a ConcurrentModificationException with no detail message.


public ConcurrentModificationException(String message)
Constructs a ConcurrentModificationException with the specified detail message.

Java Platform 1.2

Submit a bug or feature Version 1.2 of Java Platform API Specification
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