Synchronized HashMap Vs Hashtable

[kri shan]

Which one is beeter Synchronized HashMap / Hashtable ? because Hashtable is defaultly Synchronized?

[Chengwei Lee]

HashMap implementation is not synchronized. Hashtable is. It really depends on the situation that you've to decide which is a better choice. But, being synchronized has a little trade-off in performance.

You could instead synchronize the method or code block that accesses the HashMap object instead.

HTH.

[Jayaraj Sekaran]

You can actually go for HashMap itself.

The advantages of HaspMap are:
1) Not synchronized
2) Can have 'Null' as value
3) Can have 'Null' as a key also.