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what is the difference between HashMap and Hashtable
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Answer Posted / chandan
The key difference between the two is that access to the
Hashtable is synchronized on the table while access to the
HashMap isn't. You can add it, but it isn't there by default.
Another difference is that iterator in the HashMap is
fail-safe while the enumerator for the Hashtable isn't. If
you change the map while iterating, you'll know.
And, a third difference is that HashMap permits null values
in it, while Hashtable doesn't.
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