How to represent optional fields?

1. How do you indicate an optional field?
2. What is an optional field?
3. How do you make a field optional in Java?

How do you indicate an optional field?

A simple way to show optional fields is to put '(optional)' within the question's label.

What is an optional field?

Optional fields are not required to save the credit as complete and have no impact on scoring. They are included to give participants the opportunity to provide additional context.

How do you make a field optional in Java?

Use null to indicate optional data within the private scope of a class. Use Optional for getters that access the optional field. Do not use Optional in setters or constructors. Use Optional as a return type for any other business logic methods that have an optional result.