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

What is testing for equality in java, What is Testing for Equality in java?...

What is Testing for Equality in java? Testing for equality is a little trickier. You would expect to test if two numbers are equal through using the = sign. However the = sign

Need help, please fix polygon method, code below: /** * @(#)AnimationExtr...

please fix polygon method, code below: /** * @(#)AnimationExtraCredit.java * * AnimationExtraCredit Applet application * * @author * @version 1.00 2013/5/5 */ import jav

Object-based programming, JavaScript is an extremely powerful object-based ...

JavaScript is an extremely powerful object-based (or prototype-based) language. It is not a full-blown OOP (Object-Oriented Programming) language, like Java, however it is an objec

Tokenizer, To load a text-file, read it line by line, and return the total ...

To load a text-file, read it line by line, and return the total number of alphanumeric tokens it contains and skip over the comments and double-quoted strings in the text-file whil

Explain the java.net package, Explain The java.net package Each package...

Explain The java.net package Each package describes a number of classes, interfaces, exceptions, and errors. For instance, the java.net package contains these, classes, interfa

Write a function that draws a cow , Write a function that draws a cow at a ...

Write a function that draws a cow at a certain location on the screen, and use the function to draw a herd of cows

Luminous Jewels - The Polishing Game, Byteland county is very famous for lu...

Byteland county is very famous for luminous jewels. Luminous jewels are used in making beautiful necklaces. A necklace consists of various luminous jewels of particular colour. Nec

Develop a customer relationship management system, You are a newly recruite...

You are a newly recruited programmer, working for an IT company. This company won a contract to develop a Customer Relationship Management System (CRM) for a major retailer. The CR

Java conditional operator expression, Question: a) Change the following...

Question: a) Change the following example, using the Java's conditional operator expression, to solve the duplication problem. public class Demonstrate { public static voi

How do i include static files within a jsp page, Static resources should al...

Static resources should always be contained using the JSP include directive. This way, the inclusion is performed just once during the translation phase. Do note that you should al

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