store and objects and made modifications

All are use when we want to handle Objects alougth difference is

ArrayList contains objects in any order while with LinkList objects are stored in the order which you entered but both are not thread safe.

Vector is similar to ArrayLias but is Thread Safe.

HashMap is not synchronized but HashTable is Synchronized

You normally use ArrayList to keep a list when you only insert at the end. ArrayList is not synchronized but it is the fastest. A Vector do the same thing as the ArrayList but it is synchronized and a little slower.

You use a LinkedList when you need to insert an element at the middle of the list. A LinkedList is not synchronized.

A HashMap is the same as Hashtable as you hash the list for ease of extraction. Hashtable is synchronized while HashMap is not.

Hi Dinesh

I think you didn't answer for the above question

txs

Prem

Reply me premkumar.cm@gmail.com