Replacement for obsolete Hashtable class in Java

Question

When I tried to use the hashtable class, Netbeans gave me an error saying:

While still supported, these classes were made obsolete by the JDK1.2 colle

Answer 1

A better replacement for Hashtable is HashMap.

As for being obsolete, I have no reference to it, but the Javadoc states:

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.

Hashtable is synchronized unlike HashMap.