why is Hashtable considered as an obsolete collection

Question

when I tried to use Hashtable in java it says it is a obsolete collection and gives a warning. so can't I use Hashtable?
can anyone please tell me the reason it is an obsolete collection

Answer 1

thanks
😀

Answer 2

Java now recommends using Map.

Here's a quote from the relevant Java documentation (adding extra whitespace for readability):

As of the Java 2 platform v1.2, this class was retrofitted to implement the Map interface, making it a member of the Java Collections Framework.

Unlike the new collection implementations, Hashtable is synchronized.

If a thread-safe implementation is not needed, it is recommended to use HashMap in place of Hashtable.

If a thread-safe highly-concurrent implementation is desired, then it is recommended to use ConcurrentHashMap in place of Hashtable.