Java Programming for Complete Beginners - Java 16 - Step 14 - Behind the Screens with Functional Interfaces - Implement

The video tutorial explains the concept of the consumer interface in Java, highlighting its role in the 'forEach' method. It discusses how a consumer is a functional interface with an 'accept' method that processes elements without returning a value. The tutorial demonstrates creating a consumer implementation for integers, emphasizing the use of lambdas and custom implementations. It concludes with a brief mention of mapping, to be covered in the next session.

What is the primary role of the Consumer interface in the 'forEach' method?

• To return a value after processing

• To consume an element and perform an action

• To filter elements based on a condition

• To map elements to a new form

Which method must be implemented when creating a custom Consumer interface?

• map

• accept

• test

• apply

In the custom implementation of the Consumer interface, what is the purpose of the 'accept' method?

• To map elements to a new type

• To return a modified element

• To print the element to the console

• To filter elements

What is the output when using a custom Consumer implementation to print integers?

• The integers are filtered

• The integers are printed twice

• The integers are returned

• The integers are mapped to strings

What is the next topic to be covered after understanding the Consumer interface?

• Mapping elements

• Filtering elements

• Sorting elements

• Reducing elements