22.2. Key Characteristics of Lambda Expressions

Try these first

1. 1.

   What is a lambda expression?

   Hint

   Think about the purpose of lambda expressions.

2. 2.

   What is type inference?

   Hint

   Consider how types are figured out without explicit definitions.

3. 3.

   What feature allows lambda expressions to not require separate method definitions?

   • Type Inference
   • Anonymous Inner Classes
   • Conciseness

   Hint

   Consider the implications of brevity in programming.

4. 4.

   True or False: Lambda expressions can be used in traditional object-oriented programming without modification.

   • True
   • False

   Hint

   Think about how Java combines paradigms.

5. 5.

   Create a lambda expression to concatenate two strings, and assign it to a functional interface. Demonstrate how you would use it to concatenate 'Hello' and 'World'.

   Hint

   Think about how you would implement the lambda linking to string functionalities.

6. 6.

   Discuss the internals of a lambda expression and how it relates to functional interfaces. Why is using the @FunctionalInterface annotation beneficial?

   Hint

   Consider the relationship between interfaces and classes in Java.