Difference between Association and Aggregation
Prerequisite – Association, Composition and Aggregation in Java
Association: An association is defined as an organization of people with a common purpose and having a formal structure. It represents a binary relationship between two objects that describes an activity. It is a relationship between objects. For example, A doctor can be associated with multiple patients.
Aggregation: An aggregation is a collection, or the gathering of things together. This relationship is represented by a “has a” relationship. In other words, aggregation is a group, body, or mass composed of many distinct parts or individuals For example, phone number list is an example of aggregation.
Difference between Aggregation and Association:
Aggregation |
Association |
Aggregation describes a special type of an association which specifies a whole and part relationship. |
Association is a relationship between two classes where one class use another. |
It in flexible in nature |
It is inflexible in nature |
Special kind of association where there is whole-part relation between two objects |
It means there is almost always a link between objects |
It is represented by a “has a”+ “whole-part” relationship |
It is represented by a “has a” relationship |
Diamond shape structure is used next to the assembly class. |
Line segment is used between the components or the class |
Last Updated :
15 Mar, 2023
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