Doubt in Hash Map and Hash Table

[Prasad Chelur]

I knew Hash table is synchronized and Hash Map is not synchronized.
my question which method in Hash Table is sychronized.
Is there any way that we can make Hash Map synchronized.If yes how?

[Manish Hatwalne]

The Hashtable is thread-safe, and if you want to make HashMap threadsafe, you can use -

Map m = Collections.synchronizedMap(new HashMap(...)); //from the API DOCs

Or you can obtain a lock on hashmap object as and when you require it for a synchronized block.
HTH,
- Manish