Difference between HashMap and HashTable
1) HashTable is thread-safe/synchronized
HashMap is not thread safe and faster
2) HashTable does not allow any null key
HashMap allows one null key
3) Both of them implement Map interface.
Difference between HashMap and HashTable
1) HashTable is thread-safe/synchronized
HashMap is not thread safe and faster
2) HashTable does not allow any null key
HashMap allows one null key
3) Both of them implement Map interface.
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