Chapter 4. Encapsulation of Data

In this chapter, we will learn the different members of a class in Java 9 and how they are reflected in members of the instances generated from a class. We will work with instance fields, class fields, setters, getters, instance methods, and class methods. We will:

• Understand the members that compose a class in Java 9
• Declare immutable fields
• Work with setters and getters
• Understand access modifiers in Java 9
• Combine setters, getters, and a related field
• Transform values with setters and getters
• Use static fields and static methods to create values shared by all the instances of a class