Learn Java from Scratch - A Beginner's Guide - Step 13 - Exploring Java New Features - Switch Expression

The video tutorial introduces switch expressions in Java, highlighting their release in JDK 14. It contrasts switch expressions with traditional switch statements, emphasizing the simplification and elimination of fall-through issues. The tutorial provides examples of using switch expressions to determine the day of the week, demonstrating how they can simplify code and handle complex logic using the 'yield' keyword. The absence of fall-through in switch expressions is also discussed, showcasing the benefits of this feature in Java programming.

What is the main advantage of using switch expressions over switch statements?

• They require more code.

• They can only be used with strings.

• They eliminate the need for break statements.

• They allow for multiple return values.

Which Java version made switch expressions a standard feature?

• JDK 15

• JDK 14

• JDK 13

• JDK 12

In the basic switch expression example, what is the input type used to determine the day of the week?

• Character

• Integer

• Boolean

• String

How does a switch expression differ from a switch statement in terms of syntax?

• Switch expressions use colons instead of semicolons.

• Switch expressions use '->' instead of ':' and do not require breaks.

• Switch expressions require a default case.

• Switch expressions can only be used in loops.

What happens if a case in a switch expression is matched?

• The code falls through to the next case.

• An error is thrown.

• The switch expression restarts.

• The matched case's value is returned immediately.

What keyword is used to return a value from a block of code within a switch expression?

• return

• yield

• break

• continue

In a switch expression, what is the purpose of using braces?

• To specify a default case.

• To indicate the end of the switch expression.

• To allow for complex logic before yielding a value.

• To group multiple cases together.