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

Program for sorting algorithm - java program, Introduction: In this pr...

Introduction: In this project, you will explore a few sorting algorithms. You will also test their efficiency by both timing how long a given sorting operation takes and count

What is java rmi, Remote Method Invocation (RMI) is the process of activati...

Remote Method Invocation (RMI) is the process of activating a method on a remotely running object. RMI offers location transparency in the sense that it gives the feel that a metho

Preemptive scheduling and time slicing, In pre-emptive scheduling, the high...

In pre-emptive scheduling, the highest priority task implements until it enters the waiting or dead states or a higher priority task comes into existence. In time slicing, a tas

Use of unicastremoteobject in rmi, What is the use of UnicastRemoteObject i...

What is the use of UnicastRemoteObject in RMI? Ans) The UnicastRemoteObject class gives support for point-to-point active object references using TCP streams. Objects that need

Simon game project, i''m trying to make a code to make the simon says game ...

i''m trying to make a code to make the simon says game and i can''t figure it outt

Java coding required, Java coding required Project Description: Need ...

Java coding required Project Description: Need to develop a website. Require Java coders urgently. Skills required are Graphic Design, HTML, PHP, Java, Website Design

Explain ftp-telnet-voip and instant messaging, Write a brief note on each o...

Write a brief note on each of the following. FTP Telnet Instant messaging VoIP FTP: File Transfer Protocol: This protocol is used to upload and download the

What is an iterator, What is an Iterator? Some of the collection classe...

What is an Iterator? Some of the collection classes give traversal of their contents via a java.util.Iterator interface. This interface permits you to walk through a collection

Write a java applet using swing components, The project is optional. It is ...

The project is optional. It is worth at least 7 bonus points beyond overall 100 points of this course. The grading will be on a pass/fail basis. Write a Java application (not ap

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