Association(HAS-A) Aggregation And Composition in Java [MOST COMMONLY ASKED INTERVIEW QUESTION]

In this video of code decode we have discussed about Association Aggregation and Composition in Java in detail

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Course Description Video :

Association
Association refers to the relationship between multiple objects. It refers to how objects are related to each other and how they are using each other's functionality. Composition and aggregation are two types of association.

Composition
The composition is the strong type of association. An association is said to composition if an Object owns another object and another object cannot exist without the owner object. Consider the case of Human having a heart. Here Human object contains the heart and heart cannot exist without Human.

Aggregation
Aggregation is a weak association. An association is said to be aggregation if both Objects can exist independently. For example, a Team object and a Player object. The team contains multiple players but a player can exist without a team.

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#Association #Aggregation #Composition

[Landon_Hughes]

I had a hard time understanding this before watching this video.
Now I understand. Thank you!!

[kids-plays]

Example wise, if composition is there, you can declare part-of variable like engine as private final so that it has to be initialize to exist the car or initialize Car instance.

[wishadw]

sorry to be pedantic . The Code shown is just wrong.
In aggregation, the parent class is not responsible for its creation and will have its own life cycle . The code shown here for aggregation exhibits composition.
for Aggregation if its unclear how to do it,
The other objects are injected during construction and its also rightly called as dependency injection and only by that design aggregation can be acheived.

[amulyal]

Pretty Straight forward and catchy explanation:) Thank you

[stephanesonkeng]

Hello thanks for the video, looking at the code only, how can you differentiate between aggregation and composition?

[chetankhandave]

Once again, very nice video, but I have one question.
If there is part of relation between car and engine, so engine is tightly coupled with car. Does it mean engine's life cycle is completely depending on car? If engine's life cycle is depends on car, then there should not be getter method for engine, because if we provide getter method for engine then engine will be available outside class car also, then how can engine's life cycle depends on class Car. Please clear my doubt.

[seenuiglesias]

Simple and Best
I expect more from you about Core Java not only that do the videos on microservices, webservices also

[charan_]

Simple and to the point, thanks for the explanation.

[prateeksahu]

Really practical and crystal clear explanation

[sudiptanandi]

An association is known as Aggregation when one object uses another object. Is it Correct?

[shravanthsrinivas]

I followed most of your videos, but somehow missed this one, and this was exactly asked today for me in Oracle, couldn't answer it properly 😢

[saundaryasrivastava]

thanks alot mam for revising these concepts

[navneettripathi]

Comparable and comparator Tutorial please...with live example

[RAMCHARAN-byoq]

mam pls explain with programetically, bcz interviewer need this. thank you

[dimashtef]

I've understood the topic even in spite of your Hindu english, great explanation

[sohilusmani]

Mam composition ka ek example run karake dikha dijiye

[codewithnain]

baki sab tu thek hn mam pr ap ro q rhi hu ..

[pavankumar-vgev]

Association(HAS-A) Aggregation And Composition in Java madam pls give me code link

[gamesfun]

but this concept mostly use in android programing

[jaserq]

the relationsihip between me and my car is composition !!!!