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Concurrent modification in single-threaded programs is usually a result of inserting or removing an element during iteration. Multithreaded programs add the possibility that a collection may be modified by one thread while another thread iterates over the collection. Unspecified Undefined behavior results in either case. Many implementations throw a ConcurrentModificationException when they detect concurrent modification.
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Some static analysis tools can detect some cases where an iterator is being used after the source container of the iterator is modified.
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<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="83dc511cd306a8cb-c0fa43e1-4e1b48e9-b4938d83-663055ddf6e636294926fcfe"><ac:plain-text-body><![CDATA[ | [[SDN 2008 | AA. Bibliography#SDN 08]] | [Sun Bug database, Bug ID 6687277 | http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6687277] | ]]></ac:plain-text-body></ac:structured-macro> |
<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="d357411188496b8d-9d330a2d-42db467d-8ffbb74d-8a6a064567857338258f458c"><ac:plain-text-body><![CDATA[ | [[Goetz 2006 | AA. Bibliography#Goetz 06]] | 5.1.2. Iterators and | ]]></ac:plain-text-body></ac:structured-macro> |
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