HashMap vs. Hashtable similarities Both the Hashtable and HashMap implement the Map interface and both share the same set of methods used to add, remove and manipulate elements of a key-value, ...

For example, it uses java.util.Hashtable to store the relationship between customers and countries. The java.util.Hashtable key is country name, and values are customers stored in a java.util.Vector.

Cannot Assume Serializability for Java Map’s Nested Classes how-to Oct 23, 2010 7 mins Software Development ...

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