📅 最后修改于: 2020-11-14 06:15:04 🧑 作者: Mango
java.util.Dictionary类是任何类的抽象父类，例如Hashtable，它将键映射到值。以下是有关Dictionary的重点：
在此类中，每个键和每个值都是一个对象。
在他的类对象中，每个键最多与一个值关联。
以下是java.util.Dictionary类的声明-
public abstract class Dictionary
extends Object
| Sr.No. | Constructor & Description |
|---|---|
| 1 |
Dictionary() This is the single constructor. |
| Sr.No. | Method & Description |
|---|---|
| 1 | abstract Enumeration 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 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. |
此类从以下类继承方法-