22.6. Lambda vs Anonymous Class

Try these first

1. 1.

   What is a lambda expression?

   Hint

   Think about how it can implement a functional interface.

2. 2.

   How many methods can a lambda expression override?

   Hint

   Consider the definition of functional interfaces.

3. 3.

   Which of the following statements is true?

   • Lambda expressions require new class creation.
   • Anonymous classes can override multiple methods.
   • Both require explicit variable declaration.

   Hint

   Consider method overriding capabilities.

4. 4.

   True or False: this in a lambda expression refers to the anonymous class instance.

   • True
   • False

   Hint

   Think about scope of `this`.

5. 5.

   Given a functional interface with more than one method, can a lambda implement it? Explain your reasoning.

   Hint

   Recall the definition of functional interfaces.

6. 6.

   Consider a scenario where performance is critical. Which would you choose, a lambda or an anonymous class? Justify your choice.

   Hint

   Think of how each affects performance.