An object of one class act as a Data member of another class. If a class has a reference of another class (also known as contained object, or entity reference), i.e. known as has-a relationship.
What is is a relationship in Java Javatpoint?
An object of one class act as a Data member of another class. If a class has a reference of another class (also known as contained object, or entity reference), i.e. known as has-a relationship.