Java Collections Hierarchy Tutorial

Java collection frameworks can be divided into 2 groups. Descendants of java.util.Collection interface and descendants of java.util.Map interface.

Hierarchy of the java.util.Collection interface

Some descendants of the java.util.Collection interface

• java.util.AbstractCollection
• java.util.Set
• java.util.SortedSet
• java.util.NavigableSet
• java.util.HashSet
• java.util.TreeSet
• java.util.LinkedHashSet
• java.util.Queue
• java.util.AbstractQueue
• java.util.PriorityQueue
• java.util.concurrent.BlockingQueue
• java.util.concurrent.TransferQueue
• java.util.Deque
• java.util.ArrayDeque
• java.util.concurrent.BlockingDeque
• java.util.List
• java.util.AbstractList
• java.util.ArrayList
• java.util.LinkedList
• java.util.Vector
• java.util.Stack

Hierarchy of the java.util.Map interface

Some descendants of the java.util.Map interface

• java.util.SortedMap
• java.util.NavigableMap
• java.util.concurrent.ConcurrentMap
• java.util.concurrent.ConcurrentNavigableMap
• java.util.Dictionary
• java.util.AbstractMap
• java.util.SortedMap
• java.util.HashTable
• java.util.HashMap
• java.util.TreeMap
• java.util.LinkedHashMap
• java.util.Properties

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