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, ...

Java has two hash table classes: HashTable and HashMap. In general, you should use a HashMap. While both classes use keys to look up values, there are some important differences, including: A ...

The other two important implementations of Map interface are java.util.HashMap and java.util.TreeMap. They offer mostly the same functionality. The most important difference is the order in which ...