Collections Framework

List

Non Concurrent

• ✅ ArrayList

• ✅ LinkedList

• ❌ Stack

Concurrent

• ❌ Vector

• ✅ CopyOnWriteArrayList

Set

Non Concurrent

• ✅ Hash Set

• ✅ LinkedHashSet

• ✅ TreeSet

• ❌ EnumSet

Concurrent

• ❌ ConcurrentSkipListSet

Map

Non Concurrent

• ✅ HashMap

• ✅ LinkedHashMap

• ✅ TreeMap

• ❌ EnumMap

Concurrent

• ✅ ConcurrentHashMap

• ✅ ConcurrentSkipListMap

Queue

Non Concurrent

Concurrent