What is association example?

An association is a “using” relationship between two or more objects in which the objects have their own lifetime and there is no owner. As an example, imagine the relationship between a doctor and a patient. A doctor can be associated with multiple patients.

What is association aggregation in Java?

Definition. Association refers to “has a” relationship between two classes which use each other. Aggregation refers to “has a”+ relationship between two classes where one contains the collection of other class objects.

What is association and its types in Java?

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.

What are the forms of association?

The two forms of association are Aggregation and Composition.

Why do we need association in Java?

Association manages one-to-one, one-to-many, and many-to-many relationships. In Java, the multiplicity between objects is defined by the Association. It shows how objects communicate with each other and how they use the functionality and services provided by that communicated object.

What’s the difference between association and aggregation?

Difference between Aggregation and 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.

What is difference between association aggregation and composition?

Aggregation is a weak Association. Composition is a strong Association. Aggregation means one object is the owner of another object. Composition means one object is contained in another object.

What is attribute of association?

Association of Attributes is When data is collected on the basis of some attribute or attributes, we have statistics commonly termed as statistics of attributes. It is not necessary that the objects may process only one attribute; rather it would be found that the objects possess more than one attribute.