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Java 2 Platform SE v1.3.1: Class ConcurrentModificationException
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JavaTM 2 Platform
Std. Ed. v1.3.1
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java.util
Class ConcurrentModificationException

java.lang.Object
  |
  +--java.lang.Throwable
        |
        +--java.lang.Exception
              |
              +--java.lang.RuntimeException
                    |
                    +--java.util.ConcurrentModificationException
All Implemented Interfaces:
Serializable
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 SDK) 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.

Since:
1.2
See Also:
Collection, Iterator, ListIterator, Vector, LinkedList, HashSet, Hashtable, TreeMap, AbstractList, Serialized Form

Constructor Summary
ConcurrentModificationException()
          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

ConcurrentModificationException

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

ConcurrentModificationException

public ConcurrentModificationException(String message)
Constructs a ConcurrentModificationException with the specified detail message.
Parameters:
message - the detail message pertaining to this exception.
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For further API reference and developer documentation, see Java 2 SDK SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.

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