Question about clone a Hashtable
 

Hello everyone,


I want to clone the content of a Hashtable (its keys, its values and its key-value relationship). But I have found that the clone method can not completely clone a Hashtable, as is mentioned in the description of clone method of Java API Specification,

Creates a shallow copy of this hashtable. All the structure of the hashtable itself is copied, but the keys and values are not cloned. This is a relatively expensive operation.

I am wondering what is the efficient and effective approach of cloning a Hashtable, including the clone of its keys, its values and its key-value relationship.


Thanks in advance,
George