Practice Method References (5.7) - Java Streams and Lambda Expressions

Practice: Method References

Lesson 5.7Java Streams and Lambda Expressions

Practise this section

9 questions

Flashcard drill
3 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
Sign up to start the exercise
Quiz
3 questions · about 2 min · pass mark 70%. Hints available.
Sign up to start the quiz

6 sample questions

Question 1.
What is the syntax for a method reference?
Show hintHide hint
Think about how you would refer to a method of a class.
Question 2.
Give an example of using a method reference to print elements of a list.
Show hintHide hint
What method do you use to print elements in a collection?
3Question 3.
What is a method reference used for in Java?
- Creating methods
- Referring to methods
- Declaring methods
Show hintHide hint
Consider the purpose of a reference in programming.
4Question 4.
True or False: Method references reduce the amount of boilerplate code written.
- True
- False
Show hintHide hint
Think about the differences in the code structure.
Question 5.
Create a Java program that uses method references to sort a list of integers in reverse order, using the Collections.sort method.
Show hintHide hint
Remember how method references can change the way we think about traditional sorting methods.
Question 6.
Using method references, write a program that takes a list of names and converts them to lowercase and sorts them.
Show hintHide hint
Think about how to combine method references with other stream operations.

5 more questions in this section. Enroll free to practise them all.