22.8. Lambda Expressions in Collections API

Try these first

1. 1.

   What does the forEach method do in a collection?

   Hint

   Think about actions performed on each item.

2. 2.

   What does the removeIf method do?

   Hint

   Focus on conditions that trigger removal.

3. 3.

   What method allows you to iterate over elements in a collection and execute an action?

   • forEach
   • map
   • stream

   Hint

   Focus on iteration methods.

4. 4.

   True or False: The removeIf method can remove items from a collection based on a predicate defined in a lambda expression.

   • True
   • False

   Hint

   Think about the ability to filter items.

5. 5.

   Write a Java program that initializes a list of random integers between 1 and 100, removes all even numbers and sorts the list in descending order. Print the final list.

   Hint

   Think about how to define your conditions for removing and sorting.

6. 6.

   Discuss how lambda expressions impact the readability of code compared to traditional loops. Provide an example for clarity.

   Hint

   Consider how the structure of your code changes.