Java Collections Framework-Part2 | Interfaces And Classes

Topic: Java Collection Framework - Interfaces & Classes
-----------------
Collection
List
Set
Queue
Map

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[shivasubramaniam]

Notes For My Reference:
1) List (Interface)
List is a child of Collection

when to use:
1) when order is necesarry, the insertion order should be
preserved.
2) Duplicated elements are allowed.

Classes which has impletemented List:
ArrayList
LinkedList
Vector, Stack(Legacy Classes)


2) Set (Interface)
Set is a child of Collection

when to use:
1) Insertion Order is not preserved.
2) Duplicates are not allowed.

Classes which has impletemented List:
LinkedHashSet
HashSet

3) Queue (Interface)
Set is a child of Collection
FIFO Concept is used

Independent Interface called MAP (not a child interface)

4) Map
Present in key value pair.
Key and value are object.
the keys cannot be duplicated.
the values can be duplicated.

Classes:
HashMap
LinkedHashMap

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