8.2-1_Creating Classes

Question 1

How to specify a class is a subclass from another class?

Answer 1

By using the extends keyword …
class {ChildClassName} extends {ParentClassName} {
…
}

Question 2

What is a top-level class?

Answer 2

It’s a class that is not defined inside another class.

Question 3

What is an inner class?

Answer 3

It’s a class defined inside of another class.

Question 4

Can we apply access modifiers to Class definitions?

Answer 4

Yes, But there are some distinctions for Top-level & Inner classes

Question 5

What are the access-modifiers allowed for a Top-level class?

Answer 5

Top-level classes can only have public or default (package-private) access.

• > public access to a class indicates that it can be referenced and used in any class.
• > default (package-private) access, indicates the class can be accessed only by a class within the same package. (The lack of any access modifier)

Question 6

What are the access-modifiers allowed for an Inner class?

Answer 6

Inner-level classes: In addition to public and package-private access, can also have protected and private access.