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Java Fundamentals

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Collections Framework OverviewšŸ’¼
Collection Interface
List Interface
ArrayListšŸ’¼
LinkedList
Vector
Stack
Set Interface
HashSetšŸ’¼
LinkedHashSet
TreeSet
Queue Interface
PriorityQueue
Deque Interface
ArrayDeque
Map Interface
HashMapšŸ’¼
LinkedHashMap
TreeMap
Hashtable
Comparable Interface
Comparator InterfacešŸ’¼
Iterator
Collections Class
Concurrent Collections
Languages/Java/Collections Framework/Hashtable

Hashtable

Synchronized hash map

Hashtable

Legacy synchronized map.

Code Examples

Hashtable usage

java
1
2Hashtable<String, Integer> ht = new Hashtable<>();
3          

Use Cases

  • Legacy code

Common Mistakes to Avoid

  • Using instead of ConcurrentHashMap
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