Java Programming for Complete Beginners - Java 16 - Step 12 - Encapsulation Exercises - Better Validation and Book Class

The video tutorial discusses the concept of encapsulation in programming, focusing on how to manage speed and book copies using encapsulation techniques. It highlights the importance of validation and how encapsulation can simplify logic changes without affecting external code. The tutorial provides examples of using set methods to encapsulate logic and avoid code repetition, demonstrating encapsulation level 2, where business logic is integrated within the class.

What problem arises when there is no validation check in the speed method?

• The speed value remains constant.

• The speed value becomes too high.

• The speed value becomes zero.

• The speed value becomes negative.

How can encapsulation help in managing validation logic?

• By centralizing validation logic within a method.

• By duplicating validation logic in multiple places.

• By allowing direct access to variables.

• By removing validation logic entirely.

What is the advantage of using encapsulation when changing logic inside an object?

• It requires rewriting the entire codebase.

• It increases the complexity of the code.

• It allows changes without affecting external code.

• It makes the code less readable.

In the book example, what method is used to increase the number of copies?

• Directly modifying the variable.

• Using a temporary variable.

• Using a set method with validation.

• Using a loop to add copies.

What exercise is left for the viewer regarding the book example?

• To remove all validation logic.

• To update the bookrunner class and test methods.

• To write a new class from scratch.

• To create a graphical user interface.