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Difference in ConcurrentHashMap and synchronized Map
JDK 1.5 introduces some good concurrent collections which is highly efficient for high volumehttp://javarevisited.blogspot.com/2011/04/difference-between-concurrenthashmap.html
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Total Votes: 37 votes
Average Rating: 2.57 out of 5
Category: JAVA/Collections
Description:
The synchronized collections classes, Hashtable and Vector, and the synchronized wrapper classes, Collections.synchronizedMap and Collections.synchronizedList, provide a basic conditionally thread-safe implementation of Map and List. However, several factors make them unsuitable for use in highly concurrent applications for example their single collection-wide lock is an impediment to scalability and it often becomes necessary to lock a collection for a considerable time during iteration to prevent ConcurrentModificationExceptionRating Detail
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