12 Traits as interfaces

 

After reading this lesson, you will be able to

  • Declare an interface using a trait
  • Implement classes, objects, and traits that conform to one or more interfaces
  • Define a closed set of values using sealed traits

12.1 Defining traits

12.2 Extending traits

12.3 Sealed traits

12.4 Enumeration in Scala 3

Summary

Answers to quick checks