22.10. Method References and Constructor References

Try these first

1. 1.

   What is the syntax for a method reference?

   Hint

   Think about how you would normally call a method.

2. 2.

   What purpose do constructor references serve?

   Hint

   It's related to creating new objects.

3. 3.

   What is the primary purpose of a method reference?

   • To instantiate classes
   • To refer to methods directly
   • To create lambdas

   Hint

   Think about what method references do.

4. 4.

   True or False: A constructor reference uses the syntax ClassName::methodName.

   • True
   • False

   Hint

   Consider how constructors are instantiated.

5. 5.

   Given a list of strings, use a method reference to print them all to the console.

   Hint

   Remember to use the correct method reference syntax.

6. 6.

   Create a constructor reference for a HashMap and assign it to a Supplier.

   Hint

   Think about how to instantiate new maps.