What is has a relationship in Java?

Inheritance is one of the key features of OOP that allows us to create a new class from an existing class . The new class that is created is known as subclass (child or derived class) and the existing class from where the child class is derived is known as superclass (parent or base class).

In Java, a Has-A relationship essentially implies that an example of one class has a reference to an occasion of another class or another occurrence of a similar class . For instance, a vehicle has a motor, a canine has a tail, etc.

The dot ( . ) is used to access the object’s attributes and methods. To call a method in Java, write the method name followed by a set of parentheses (), followed by a semicolon ( ; ) . A class must have a matching filename ( Main and Main. java).

In Java, we can create Objects in various ways: