JAVA-HashTable

Hashtable의 특징

1) Key와 Value의 저장구조

2) 인덱스가 없다.

3) 객체여야 저장가능하다.

4) 객체를 넣었기에 값을 꺼낼 때(복사할 때) Casting이 필요하다.

5) 중복 키가 불가능하다.

6) 찾는 키가 없다면 null값을 반환한다.

 

Hashtable위치

java.util.

Class Hashtable<K,V>

• java.lang.Object
• • java.util.Dictionary<K,V>
  • • java.util.Hashtable<K,V>

ConstructorsConstructor and Description

Hashtable() Constructs a new, empty hashtable with a default initial capacity (11) and load factor (0.75).

Hashtable(int initialCapacity) Constructs a new, empty hashtable with the specified initial capacity and default load factor (0.75).

Hashtable(int initialCapacity, float loadFactor) Constructs a new, empty hashtable with the specified initial capacity and the specified load factor.

Hashtable(Map<? extends K,? extends V> t) Constructs a new hashtable with the same mappings as the given Map.

 

Modifier and TypeMethod and Description

V	get(Object key) Returns the value to which the specified key is mapped, or null if this map contains no mapping for the key.

 

HashMap과 HashTable 참고 사이트:

https://d2.naver.com/helloworld/831311

불러오는 중입니다...