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# Java Dictionary Class [Java Data Structures](#) * * * The Dictionary class is an abstract class used to store key/value pairs, functioning similarly to the Map class. Given a key and a value, you can store the value in a Dictionary object. Once the value is stored, it can be retrieved by its key. Therefore, like a Map, a Dictionary can also be viewed as a list of key/value pairs. The abstract methods defined in the Dictionary class are shown in the following table: **No.** **Method Description** 1**Enumeration elements( )** Returns an enumeration of the values in this dictionary. 2**Object get(Object key)** Returns the value to which the specified key is mapped in this dictionary. 3**boolean isEmpty( )** Tests if this dictionary maps no keys to values. 4**Enumeration keys( )** Returns an enumeration of the keys in this dictionary. 5**Object put(Object key, Object value)** Maps the specified key to the specified value in this dictionary. 6**Object remove(Object key)** Removes the key (and its corresponding value) from this dictionary. 7**int size( )** Returns the number of entries (distinct keys) in this dictionary. The Dictionary class is obsolete. In practical development, you can (#) to obtain key/value storage functionality. * * Java Data Structures](#)