Scala for the Impatient, 3rd Edition

Chapter 5. Classes

Topics in This Chapter A1

• 5.1 Simple Classes and Parameterless Methods

• 5.2 Properties with Getters and Setters

• 5.3 Properties with Only Getters

• 5.4 Private Fields

• 5.5 Auxiliary Constructors

• 5.6 The Primary Constructor

• 5.7 Nested Classes L1

• Exercises

In this chapter, you will learn how to implement classes in Scala. If you know classes in Java, Python, or C++, you won’t find this difficult, and you will enjoy the much more concise notation of Scala.

The key points of this chapter are:

• An accessor method with no parameters does not need parentheses.

• Fields in classes automatically come with getters and setters.

• You can replace a field with a custom getter/setter without changing the client of a class—that is the “uniform ...