You don’t have to create any Book objects to call class ... belongs to the same package (discussed later in the Java 101 series) as the class containing the member that is to be accessed.

Car(String make, String model ... you’ve largely completed your exploration of Java’s class and object language features. The next tutorial in this series dips into interfaces, a slightly ...

proposed in JEP 409 and available since Java 17, let developers limit and control how deeply a component's type hierarchy can extend. With sealed classes, a developer can essentially create a ...

To effectively use Unified Modeling Language when developing Java applications, developers must have a thorough understanding of the UML elements and how these elements map to Java. To effectively ...

You need a whole new class to implement a single method. Furthermore, the logic is separated from the point in which it is needed. This will make troubleshooting and code maintenance more difficult.