Before move into the collection we have to know the reason why we are move on to the collection framework.
You may have the dounts on :
1.what is framework
Think of building a house. A framework is like buying a pre‑fabricated steel skeleton: the rooms, floors, and wiring slots are pre‑decided. You still add walls, paint, furniture (your custom code) but you stay inside the skeleton.
in simple already theye have a predifined methods ,classes and interfaces we can use it as based on our needs.
2.why i need this framework
these are code reusable,
speed pugin , and more
3.what is collections
collections is framework,that have lot of interfacses and implemented classes.it is defined in jdk1.2 .collections is a group of elemnts(obj).
4.why we need collection framework
many build in methods are here so we can easily do our tasks.
code resusability.
time save more .
5.hierarchy of this collections framework
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