Java Programming Session 27: Collection Framework- ArrayList Introduction

Hello Everyone ,
Welcome to my channel Priyankaaz IT School
In this live session I have explained about Collection Framework and List ,Set interface and ArrauyList Class
I hope you will love it.

Array
1. Array are in fixed size
2.with respect to memory array not recommended to use.
3.w.r.t. performance array are recommended to use to use.
4.Array can hold only homogeneous data elements
5.There is no underline data structure for arrays & hence readymade method support is not available.
6.Array can hold primitive and object type data.


Collection
1.Collection are in growable in nature i.e based on our requirement we can increase and decrease.
2.with respect to memeory are recommended to use.
3.W.r.t. performance collections are not recommended
4.Collection can hold both homegeneous and hetrogeneous data elements
5.Every Collection class implemented based on some standard data structure.Hence readymade
method support is available for every requirement.
6.Collection can hold only object type.

List Vs Set
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List
List is child interface of collection .
List allowed duplicates elements
List maintain insertion order

Set
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Set is child interface of collection
Set does not allowed duplicates elements
Set does not maintain insertion order

ArrayList
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ArrayList is class implements List interface
The underline data structure is growable Array
Duplicates elements allowed
Insertion order is maintain
Null insertion is possible

ArrayList and Vector class implements RandomAccess interface so that we can access only random elements with the same speed
Hence, if our frequent operation is retrieval operation then
ArrayList is the best choice.


keep Learning!
Thanks,
Priyanka