Difference between composition and aggregation, JAVA Programming

Assignment Help:

Aggregation

Composition

Aggregation :  An  association   in  which  one  class refers to collection or a another class. This is a part of  a  whole   relationship  where  the  phase   can  exist without the whole .

e.g.: A line item is whole and the products are the phases. If a line item is deleted then the products have not be deleted .

Composition :  An  association   in  which  one  class  refers  to another class or a collection. This is a part of a whole relationship where  the  phase   cannot  implement  without  the  whole .  If  the  whole  is deleted then the parts are deleted.  For example:  An Order is a whole and the line items are the phase. If an order is removed then all the line items should be deleted as well.

Aggregations are not used to be circular.

In  a  garbage-collected  language  like  Java,  The  whole   has  the responsibility of  operating   the  garbage  collector  to  prematurely collect the part by holding reference to it.


Related Discussions:- Difference between composition and aggregation

Thread, create thread without extending anything

create thread without extending anything

What is spreadsheet and list any two jobs that it can do, What is spreadshe...

What is spreadsheet? List any two jobs that it can do? A spreadsheet is a grid which organizes data within columns and rows. Spreadsheets form it simple to display information,

File I/O, Write a program that reads both the girl and boy files into memor...

Write a program that reads both the girl and boy files into memory using arrays. Then, allow the user to input a name. The program should search through both arrays. If there is

Develop a custom android app, Develop a Custom Android App Project Descr...

Develop a Custom Android App Project Description: We want you to construct a custom Android app. Once user downloads the app and upon installation the user gets push notif

Develop an ehospital project, Develop an ehospital project Project Descr...

Develop an ehospital project Project Description: I am preparing ehopsital project.for the requires of hospital in that patient registration and billing module and stores mod

K-means clustering, i) Set the number of data points to 20 and the number o...

i) Set the number of data points to 20 and the number of clusters to 2. Check box Show History. Click on Initialize. Click on Start. Click on Step . Observe which points ch

Javaserver faces event and listener model, What is JavaServer Faces event a...

What is JavaServer Faces event and listener model? Ans) A mechanism for verifying how events emitted by JavaServer Faces UI components are handled. This model is based on the Ja

Small projects, i am doing java and want projects with solutions to practic...

i am doing java and want projects with solutions to practice more and more

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd