Java.util.Dictionary Class

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Introduction

The java.util.Dictionary class is the abstract parent of any class, such as Hashtable, which maps keys to values.Following are the important points about Dictionary −

• In this class every key and every value is an object.

• In his class object every key is associated with at most one value.

Class declaration

Following is the declaration for java.util.Dictionary class −

public abstract class Dictionary<K,V>
   extends Object

Class constructors

Sr.No.	Constructor & Description
1	Dictionary() This is the single constructor.

Class methods

Sr.No.	Method & Description
1	abstract Enumeration<V> elements() This method returns an enumeration of the values in this dictionary.
2	abstract V get(Object key) This method returns the value to which the key is mapped in this dictionary.
3	abstract boolean isEmpty() This method tests if this dictionary maps no keys to value.
4	abstract Enumeration<K> keys() This method returns an enumeration of the keys in this dictionary.
5	abstract V put(K key, V value) This method maps the specified key to the specified value in this dictionary.
6	abstract V remove(Object key) This method removes the key (and its corresponding value) from this dictionary.
7	abstract int size() This method returns the number of entries (distinct keys) in this dictionary.

Methods inherited

This class inherits methods from the following classes −

• java.util.Object