OOPS in JAVA 12
Aggregation in Java
If a class have an entity reference, it is known as Aggregation. Aggregation represents HAS-A relationship.
Example:
class Employee{
int id;
String name;
Address address; //Address is a class
...
}
In such case, Employee has an entity reference address, so relationship is Employee HAS-A address.
Why use Aggregation??
For Code Reusability.
When use Aggregation??
1. Code reuse is also best achieved by aggregation when there is no IS-A relationship.
2. Inheritance should be used only if the relationship IS-A is maintained throughout the lifetime of the objects involved; otherwise, aggregation is the best choice.
Dinesh Kumar S is a 23-year-old System Administrator who enjoys playing games, listening to music and learning new technology. He is friendly and generous, but can also be very lazy and crazy.
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