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Java / Map and its implementations

Difference between Collections.synchronizedMap and Hashtable.

Both are thread-safe implementations of the Map interface.

Both provide the same degree of synchronization.

HashTable is part of Java's legacy code.

The Hashtable class has all its methods synchronized i.e. the locking is done at the method level and hence one can say that the mutex is always at the Hashtable object (this) level.

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Queue and its implementations

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