Immutable options can simplify code and reduce chances of unanticipated and undesired state in objects. I prefer that all of my Java classes provide for immutable objects unless there is a ...

Abstract classes and interfaces in Java serve fundamentally different ... Can have any kind of instance or static variables, mutable or immutable. A class can implement multiple interfaces.

Therefore, let's create an immutable class. We'll follow the same Java Bean pattern and define ... The first step is to create an interface. For simplicity, we'll use a String to represent ...